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WO2018192180A1 - Articulation artificielle forgée ainsi que nouveau procédé de production et nouvelle utilisation de produit métallique - Google Patents

Articulation artificielle forgée ainsi que nouveau procédé de production et nouvelle utilisation de produit métallique Download PDF

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Publication number
WO2018192180A1
WO2018192180A1 PCT/CN2017/103633 CN2017103633W WO2018192180A1 WO 2018192180 A1 WO2018192180 A1 WO 2018192180A1 CN 2017103633 W CN2017103633 W CN 2017103633W WO 2018192180 A1 WO2018192180 A1 WO 2018192180A1
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WIPO (PCT)
Prior art keywords
forged
forging
mold
production process
magnetic field
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/103633
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English (en)
Chinese (zh)
Inventor
赵京晨
王开国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Gangxin Institute Of Metallurgical Technology
Beijing Jinshiyongchuang Technology Development Co Ltd
Beijing Jiuzhanghongtu Technology & Trade Co Ltd
Zhuozhou New Aviation Zhuoli Precision Technology Co Ltd
Original Assignee
Beijing Gangxin Institute Of Metallurgical Technology
Beijing Jinshiyongchuang Technology Development Co Ltd
Beijing Jiuzhanghongtu Technology & Trade Co Ltd
Zhuozhou New Aviation Zhuoli Precision Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Gangxin Institute Of Metallurgical Technology, Beijing Jinshiyongchuang Technology Development Co Ltd, Beijing Jiuzhanghongtu Technology & Trade Co Ltd, Zhuozhou New Aviation Zhuoli Precision Technology Co Ltd filed Critical Beijing Gangxin Institute Of Metallurgical Technology
Publication of WO2018192180A1 publication Critical patent/WO2018192180A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/002—Hybrid process, e.g. forging following casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/02—Use of electric or magnetic effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould

Definitions

  • the present application relates to the technical field of forged metal products, and in particular relates to a novel production process and use of a forged artificial joint and metal products.
  • the products currently obtained in this new production process are superior in strength, wear resistance and corrosion resistance in the same kind of products.
  • the existing traditional production process has lost the space to further improve the quality of the product.
  • the industry began to study the use of ceramic artificial joints as an example. However, the brittleness of ceramic artificial joints is difficult to break through and it has not been put into practical use. Metal artificial joints are still in commercial use.
  • the new production process has, in principle, broken through the fatal limitations of traditional production processes and demonstrated the potential to unimaginably improve product quality.
  • the present application aims to provide a novel production process and use of a forged artificial joint and a metal product, and a method for directly casting a forged blank by using a deep subcooled fine crystal casting furnace to solve the existing casting.
  • the problem of uneven grain size effectively improves product quality.
  • Step 1 Casting a fine crystal blank for forging using a deep subcooled fine grain casting furnace
  • Step 2 Cutting and grinding the whole set of fine crystal blanks to obtain a fine crystal forged blank, and then cleaning the obtained fine crystal forged blanks;
  • Step 3 The fine crystal forged blank obtained in the step 2 is placed in a heat treatment furnace for heating;
  • Step 4 The fine-grained forging blank heated in step 3 is placed in a forging die for forging;
  • Step 5 Take the forged product from the forging die and trim and polish it to obtain the finished product.
  • the deep subcooled fine crystal casting furnace mainly comprises: a melting crucible, a mold, a constant magnetic field magnetic pole, a mold carrying turntable, and the melting crucible is located above the casting mold.
  • the constant magnetic field magnetic pole is located around the mold, the mold carrying turntable is located at a lower end of the mold, and is fixedly connected with the mold;
  • the melting crucible is provided with an alternating current induction coil and a direct current a steady magnetic field; the melting crucible, the steady magnetic field pole, and the mold carrying turntable are located in the casting furnace, and the mold is placed on the mold carrying turntable from outside the furnace door by equipment.
  • the constant magnetic field magnetic pole is divided into a constant magnetic field N pole and a steady magnetic field S pole, and the stable magnetic field N pole and the steady magnetic field S pole are oppositely disposed, and the mold is located at the stable magnetic field N
  • the pole and the steady magnetic field are in the middle of the S pole.
  • the mold-carrying turntable is rotated slowly outside the furnace by a manual or electric method, and the mold-carrying turntable is input by a slow rotating shaft having a diameter of not less than 25 mm and not more than 65 mm, and the mold-carrying turntable Rotated by a ratchet.
  • the processing of the cast blank is sand cleaning, cutting, grinding, and polishing.
  • the heating temperature of the heat treatment furnace ranges from 900 ° C to 1200 ° C.
  • the forged blank is swaged using a 2 to 5 ton forging hammer.
  • novel production process can be applied to artificial joints, all metal-type medical implants other than artificial joints, and forged metal products and mechanical parts of non-medical implants.
  • the artificial joint production process can be divided into two types, one is cast type and the other is forged shape. It is currently recognized that the cast artificial joint is superior to the forged artificial joint, and the cast artificial joint has a coarse and uneven grain size, and the density is also poor; therefore, the forged artificial joint is the preferred process for producing high quality artificial joints.
  • the traditional forging artificial joint production process has many processes.
  • the specific process is: firstly casting a large steel ingot, and then casting, rolling and drawing the large steel ingot into a thin rod of a certain diameter, and then The thin rod is cut into small sections, and then the small section of the thin rod is partially thickened, and then the small section of the thin rod is bent and bent into a forged blank of the forged artificial joint, and then the blank is taken for forging. Therefore, the production of forged blanks requires a large amount of high energy-intensive work. Order, and, the blanking, rolling, drawing requires multiple hoes to the tail, wasting a lot of expensive artificial joint metal materials.
  • the forging blank made of small steel ingot will not be enough deformation, so the grain size of the forged blank is not enough. It is small, so that the grain size of the final product is not small enough.
  • a large steel ingot is cast, and then the large steel ingot is billed, rolled, drawn into a thin rod of a certain diameter, and then the thin rod is cut into small pieces, and then the small thin rod is partially thickened, and then The grain size of the forged blank of the forged artificial joint is small, but the deformation storage energy is relatively high, and the deformation texture is fine grain structure, which has strong directionality.
  • the strength of the product is directional. For example, the longitudinal strength is high, but the lateral strength is not high. If the annealing temperature is too high, the grain size driven by the deformation storage energy will increase, and the strength will decrease.
  • the new production process of the present application directly casts a forged blank having a very fine and uniform grain size, and the final product forged from the blank is not only a finer grain size, but also because the fine grain of the forged blank used is balanced.
  • the solidified equiaxed grains therefore, have no storage energy and texture directivity due to deformation, so the metal structure is stable.
  • this new process is to forge a direct casting of the blank, so the process is less, the energy consumption is less, and the material is saved. It is also worth noting that this forging process can ensure very fine grain structure of the final product with a small amount of forging deformation.
  • the metal structure is also dense after forging; thus, since the amount of deformation can be small, the chemical can be used.
  • the composition is designed with an alloy of high strength and hardness, which enables the final product to have higher strength and hardness.
  • the traditional process requires large deformation of large steel ingots, rolling, and drawing. In principle, it is not possible to use alloys with high chemical strength and high hardness.
  • the method of the present application is not only suitable for the production of metal artificial joints, but also for all metal-type medical implants other than artificial joints and forged metal products and mechanical parts of other non-medical implants, and has potential Application value;
  • the process method of the present application has less raw material consumption, less energy consumption, high product qualification rate, and is suitable for industrial production.
  • the enlightenment of the new production process is not limited to the production of metal artificial joints, and all metal-type medical implants other than artificial joints can learn from this new production process.
  • forging metal products and mechanical parts of other non-medical implants can also adopt a new production process. That is, the forging blank is not produced by the conventional process of casting, ingot rolling, drawing, and the like, but the production process of the forged product is directly produced by fine-grain casting.
  • FIG. 1 is a schematic structural view of a core portion of a deep subcooled fine grain casting furnace of the present application
  • Figure 2 is a grain structure of a conventional process casting blank
  • Figure 3 is a grain structure of a deep subcooled fine-grained casting blank of the present application.
  • Figure 4 is a product produced by the novel forging process of the present application.
  • Figure 5 is a diagram showing the state of Na 2 S corrosion resistance of a conventional process product
  • Figure 6 is a diagram showing the state of Na 2 S corrosion resistance of the product of the novel process of the present application.
  • the invention prepares a deep superfine fine crystal casting furnace, as shown in FIG. 1 , which mainly comprises a mold carrying turntable 5 , a mold 2 , a ratchet 7 , a casting bearing turntable rotating center positioning shaft 8 , a mold carrying turntable bearing wheel 6.
  • Heating element, steady magnetic field magnetic pole, melting crucible 1, melting crucible 1 is located above the mold 2, mold 2 is mounted above the mold carrying turntable 5, and a mold carrying turntable is arranged under the mold carrying turntable 5.
  • the load bearing wheel 6 and the ratchet wheel 7 are used to drive the rotation of the mold-carrying turntable 5.
  • the heating element and the constant magnetic field magnetic pole are arranged around the mold 2, and the mold-bearing turntable is arranged at the center of the lower end of the mold-bearing turntable 5.
  • the center of rotation positioning shaft 8 is used to define the center of rotation of the mold carrying carousel 5.
  • the melting crucible 1 is a crucible having a constant magnetic field or a static magnetic field and an alternating magnetic field simultaneously and separately applied to hold and melt the master alloy, and an alternating magnetic field and an alternating induction coil are applied to the melting crucible 1 .
  • the melting crucible 1 which is also called a static magnetic field, that is, more than one induction coil, and the static magnetic field induction coil can simultaneously have a resistive heating function, and the same type of furnace has only an alternating induction coil;
  • the melting crucible 1 has a structure in which the far infrared and the thermocouple are simultaneously temperature-measured, and some of the similar furnaces also have these two kinds of temperature measuring means, but cannot measure the temperature at the same time;
  • a magnetic pole is applied around the mold 2 to apply a constant magnetic field or a static magnetic field.
  • the furnace of the same type is not. The closest one is to provide a winding around the mold with a pulsed magnetic field. Meanwhile, the casting furnace of the present application is around the mold 2.
  • the value of the furnace B 1 ⁇ 2T (T-Tesla);
  • the furnace is a resistance wire, and can reach more than 1200 °C. Some furnaces of the same type have heating elements, but they are fixed and temporarily added. Less than 1200 ° C, and not the device itself;
  • the mold-carrying turntable 5 can be rotated slowly in the manual or electric mode outside the furnace, and can be stopped at any time to adjust the pouring position evenly to achieve multi-station pouring in the same furnace.
  • Some of the similar furnaces have high-speed rotating mold bearing. Turntable, but that is used for centrifugal casting; the power equipment that must be rotated at high speed due to centrifugation is very large and can only be placed outside the vacuum furnace shell. Its high-speed rotating shaft is passed into the furnace from outside the furnace, and the high-speed rotating shaft pair The damage of the vacuum seal is theoretically unavoidable.
  • the rotary transfer of the mold carrying turntable 5 is input by a slow rotating shaft with a diameter of not less than 25 mm and not more than 65 mm;
  • the maximum time is less than 1 rev / 2 seconds, which is lower than the current ability of the vacuum equipment to rotate and seal.
  • the mold-bearing turntable 5 uses a mold-bearing turntable rotation center positioning shaft 8 to define a rotation center, and the shaft does not bear the weight, and is inserted into the bottom positioning slot of the furnace, and the slot is
  • the blind hole is not connected to the outside of the vacuum furnace;
  • the lower part of the mold carrying turntable 5 is provided with a plurality of load-bearing wheels, that is, the mold-bearing turntable load-bearing wheel 6, and the periphery of the mold-bearing turntable 5 is a tooth ring that is rotated and transmitted, and the furnace is driven by the furnace.
  • the externally input rotating ratchet 7 cooperates, and the ratchet shaft leads to the outside of the furnace, that is, a slow rotating shaft for transmitting power to the casting bearing shaft; and a casting type limiting pin hole is also arranged on the bearing surface of the casting carrying turntable 5, The mold 2 is inserted into the mold limit pin hole through the fixing pin;
  • the mold 2 is placed horizontally from the outside of the furnace door by the forklift on the mold carrying turntable 5 in the furnace, and then closed. Close the furnace door, open the furnace top cover, plug the heating element resistance wire inside the furnace door into the power supply, and the mother alloy is also placed in the furnace cover by the furnace top, and the replacement of the new concrete is also the result.
  • a novel production process for forging artificial joints and metal products, and the specific steps include:
  • Step 1 Casting a fine crystal blank for forging using a deep subcooled fine grain casting furnace
  • Step 2 Sanding, cutting, grinding and polishing the cast whole set of forged fine crystal blanks to obtain fine-grained forged blanks, and then cleaning the obtained fine-grained forged blanks;
  • Step 3 The fine crystal forged blank prepared in step 2 is placed in a heat treatment furnace and heated to 900 ° C to 1200 ° C;
  • Step 4 The fine-grained forging blank heated in step 3 is placed in a forging die, and the forging is performed with a 2 to 5 ton forging hammer. After the forging is completed, the forging die is opened, and the forged artificial joint is taken out;
  • Step 5 Take the forged artificial joint from the forging die for trimming and polishing, and obtain the finished artificial joint, as shown in Fig. 4.
  • the mechanical properties and corrosion resistance of the products prepared by the present application compared with the products of the conventional forging production process are as follows. This comparison is a comparison of the mechanical properties of the old and old processes of the same alloy composition, as shown in Table 1.
  • the corrosion resistance of the product of the present application and the current process is tested by the national standard test method for medical metal materials (national standard: GB/T 17168-1997).
  • the initial comparison between the new process and the current process is not obvious, but is extended. After the corrosion time, there is a significant difference.
  • the grain structure ratio of the blank used in the novel forging process of the present application can be seen.
  • the grain structure of the existing casting process is much finer and more uniform; as can be seen from Table 1, the mechanical properties of the novel process of the present application are significantly higher than those of the prior art; as can be seen from Fig. 5 and Fig. 6,
  • the product samples of the novel process of the present application still retain a certain metallic luster, and the product samples of the current process have partially lost the metallic luster. Therefore, the Na2S corrosion resistance of the new process product is much better than the current process. .
  • the present application provides a novel production process for a forged artificial joint and a metal product.
  • the present application does not directly manufacture a forged blank by a conventional process such as casting, rolling, and drawing of a steel ingot, but directly adopts Fine grain casting manufactures forged blanks for forging production.
  • the grain size of forged blanks produced by this method is much smaller than that of general cast blanks; the uniformity of grain size can be said to be completely uniform, and the grain size is uniform throughout the casting section.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Materials For Medical Uses (AREA)

Abstract

L'invention concerne une articulation artificielle forgée et un nouveau procédé de production d'un produit métallique. Une technique de coulage de grains fins est directement utilisée pour fabriquer une ébauche de forgeage pour la production de forgeage. Le procédé comprend : étape 1 : utiliser un four de coulée à grains fins pour produire une ébauche de forgeage à grain fin pour le forgeage ; étape 2 : nettoyer l'ébauche de forgeage à grains fins produite ; étape 3 : placer l'ébauche de forgeage à grains fins obtenue à l'étape 2 dans un four de traitement thermique et chauffer celui-ci ; étape 4 : placer l'ébauche de forgeage à grains fins ayant subi un traitement thermique dans un moule de forgeage et le forger ; et étape 5 : retirer un produit forgé du moule de forgeage et réaliser un détourage et un polissage pour obtenir un produit fini. Le procédé permet à un produit fini d'avoir une résistance, une dureté, une résistance à l'usure et une résistance à la corrosion supérieures. Le procédé selon la présente invention présente moins d'étapes que les procédés de production existants de produits métalliques forgés parce qu'il ne comprend pas d'étapes telles que le crantage, le laminage et le tirage, ce qui permet de réduire la consommation de matériau et d'énergie, de réduire la pollution de l'environnement et d'assurer un taux de réussite au test élevé.
PCT/CN2017/103633 2017-04-17 2017-09-27 Articulation artificielle forgée ainsi que nouveau procédé de production et nouvelle utilisation de produit métallique Ceased WO2018192180A1 (fr)

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CN201710250062.1A CN107030234B (zh) 2017-04-17 2017-04-17 锻造型人工关节及金属制品的生产工艺及用途
CN201710250062.1 2017-04-17

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CN107042298B (zh) * 2017-04-17 2019-03-29 涿州新卓立航空精密科技有限公司 静磁致深过冷高充型能力细晶铸造炉及使用方法
CN107030234B (zh) * 2017-04-17 2018-10-19 涿州新卓立航空精密科技有限公司 锻造型人工关节及金属制品的生产工艺及用途
CN108031821A (zh) * 2017-11-10 2018-05-15 涿州新卓立航空精密科技有限公司 利用不同步弯曲获得液体深过冷的铸造炉及使用方法
CN110369654B (zh) * 2019-08-08 2020-09-25 无锡航亚科技股份有限公司 一种钛合金胫骨平台人工关节植入物的锻造方法
CN110369655B (zh) * 2019-08-08 2020-08-21 无锡航亚科技股份有限公司 一种CoCrMo胫骨平台人工关节植入物的锻造方法

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