CN1059364C - Pouring protective slag for electric slag centrifugal casting - Google Patents
Pouring protective slag for electric slag centrifugal casting Download PDFInfo
- Publication number
- CN1059364C CN1059364C CN95110010A CN95110010A CN1059364C CN 1059364 C CN1059364 C CN 1059364C CN 95110010 A CN95110010 A CN 95110010A CN 95110010 A CN95110010 A CN 95110010A CN 1059364 C CN1059364 C CN 1059364C
- Authority
- CN
- China
- Prior art keywords
- slag
- centrifugal casting
- electroslag
- weight percentage
- blast furnace
- 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.)
- Expired - Fee Related
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Manufacture Of Iron (AREA)
Abstract
本发明公开了一种电渣离心铸造用浇注保护渣，它由高炉水渣、萤石和工业纯碱组成。其配比按重量百分比计为：65-70∶15-20∶15-20，高炉水渣成分为CaO、SiO2、MgO、Al2O3，其组分按重百分比计为：34-37∶38-47∶8-10∶8-12。具有熔化温度低，导热系数小，氧化性低等特点，可广泛应用于钢厂电渣冶金技术中。The invention discloses a pouring mold slag for electroslag centrifugal casting, which is composed of blast furnace slag, fluorite and industrial soda ash. Its ratio is calculated by weight percentage: 65-70: 15-20: 15-20, and the components of blast furnace slag are CaO, SiO 2 , MgO, Al 2 O 3 , and its components are calculated by weight percentage: 34-37 :38-47:8-10:8-12. It has the characteristics of low melting temperature, low thermal conductivity and low oxidation, and can be widely used in electroslag metallurgy technology in steel mills.
Description
本发明涉及电渣冶金技术领域，特别是一种电渣离心铸造用浇注保护渣。The invention relates to the technical field of electroslag metallurgy, in particular to casting mold slag for electroslag centrifugal casting.
电渣离心铸造是八十年代由乌克兰巴顿电焊研究所发明的一项新技术。它适用于生产环类、套类、管类带中空的各种黑色和有色金属铸件。是将有衬电渣炉精炼出的钢水，带渣浇注到离心铸造机内凝固成型。由于整个铸件是在渣的保护下动态凝固而成。因此，获得的铸坯不仅表面质量好，而且内部组织致密，其性能达到同钢种锻件水平，生产工序简化，成本降低。研究表明，炉渣对铸件凝固质量起关键作用。然而目前浇注用渣是利用有衬电渣溶炼的渣，由于熔炼时炉渣的作用是发热和精炼，而浇注时其作用是成型、保温等。因此，两者之间对渣性能要求明显不同，在现有工艺中为了使渣在浇注时有良好的流动性，要把渣温提高到1800℃以上，这种方法虽然满足了浇注时渣皮成型的需要，但渣温太高不仅加剧了渣对炉衬的浸蚀，增加了电耗，而且使得钢液温度升高，增加了钢液的吸气，同时也增强了对模具的热冲击，而且过高的钢水温度增加了铸件表面裂纹的倾向。另外由于熔炼渣熔点很高，使得浇注后铸件外表面渣皮太厚，影响了表面质量和传热，同时铸件内表面熔渣过早凝固影响了铸件有害气体的排出和非金属夹杂物的去除。因此，利用熔炼渣作为电渣离心铸造用浇注保护渣是不合理的。Electroslag centrifugal casting is a new technology invented by Ukrainian Barton Electric Welding Institute in the 1980s. It is suitable for the production of various ferrous and non-ferrous metal castings with rings, sleeves, and tubes with hollow holes. It is to pour the molten steel refined from the lined electroslag furnace into the centrifugal casting machine with slag to solidify and form. Because the whole casting is dynamically solidified under the protection of slag. Therefore, the cast slab obtained not only has good surface quality, but also has a compact internal structure, and its performance reaches the level of forgings of the same steel type, the production process is simplified, and the cost is reduced. Studies have shown that slag plays a key role in the solidification quality of castings. However, at present, the slag used for casting is slag smelted by lining electroslag. Since the function of slag during smelting is heating and refining, the function of slag during pouring is molding and heat preservation. Therefore, the performance requirements of the slag are obviously different between the two. In the existing process, in order to make the slag have good fluidity during pouring, the slag temperature must be raised to above 1800°C. Although this method meets the requirements of the slag skin during pouring. Forming needs, but too high slag temperature not only intensifies the erosion of slag on the furnace lining, increases power consumption, but also increases the temperature of molten steel, increases the suction of molten steel, and also enhances the thermal shock to the mold. Moreover, the excessively high molten steel temperature increases the tendency of casting surface cracks. In addition, due to the high melting point of smelting slag, the slag skin on the outer surface of the casting is too thick after pouring, which affects the surface quality and heat transfer. At the same time, the premature solidification of the slag on the inner surface of the casting affects the discharge of harmful gases and the removal of non-metallic inclusions. . Therefore, it is unreasonable to use smelting slag as casting mold slag for electroslag centrifugal casting.
鉴于保护渣现有技术存在的不足，本发明的目的是提供一种氧化性低，导热系数小，粘度值小，熔化温度低的电渣离心铸造用浇注保护渣。In view of the deficiencies in the prior art of mold flux, the object of the present invention is to provide a pouring mold flux for electroslag centrifugal casting with low oxidizability, small thermal conductivity, low viscosity value and low melting temperature.
为达到上述目的，本发明是通过以下技术方案实现的。In order to achieve the above object, the present invention is achieved through the following technical solutions.
保护渣由高炉水渣、萤石和工业纯碱组成。其含量配比按重量百分比：65-70％∶15-20％∶15-20％。Mold flux is composed of blast furnace slag, fluorite and industrial soda ash. Its content ratio is by weight percentage: 65-70%: 15-20%: 15-20%.
高炉水渣主要成分为：CaO、SiO2、MgO、Al2O3，组分按重量百分比：The main components of blast furnace slag are: CaO, SiO 2 , MgO, Al 2 O 3 , the components are by weight percentage:
CaO，38-47％∶SiO2，34-37％∶MgO，8-10％∶Al2O3，8-12％。 CaO , 38-47%: SiO2 , 34-37%: MgO, 8-10%: Al2O3 , 8-12%.
高炉水渣是高炉炼铁的废物，目前主要用于水泥原料，价格十分便宜，数量多，其特点是碱度低，因而渣性质趋于长渣，而且熔化温度也较低约1320℃，保温性能好。渣中氧化铁低，杂质元素磷含量低，因而适用于作保护渣的基料。添加萤石和工业纯碱是起熔剂作用，可降低保护渣的熔化温度和粘度。Blast furnace slag is the waste of blast furnace ironmaking. At present, it is mainly used as cement raw material. The price is very cheap and the quantity is large. It is characterized by low alkalinity, so the slag tends to be long slag, and the melting temperature is also low, about 1320 ° C. Good performance. The iron oxide in the slag is low, and the impurity element phosphorus content is low, so it is suitable for the base material of mold slag. Adding fluorite and industrial soda ash acts as a flux, which can reduce the melting temperature and viscosity of mold flux.
其制备方法是：1、固态渣，将上述几种原料按比例称重混匀，用电渣炉在石墨坩埚内予熔，冷却后破碎碾磨到100目以下，并在每公斤渣料中加100克硅铁粉(75％Si)并混合均匀。在应用时保护渣量为钢水重量的3-5％，先将渣料放在模内，再注入钢水进行离心浇注。Its preparation method is as follows: 1. Solid slag, weigh and mix the above-mentioned several raw materials in proportion, pre-melt in a graphite crucible with an electroslag furnace, crush and grind it to below 100 mesh after cooling, and mix it in every kilogram of slag material Add 100 grams of ferrosilicon powder (75% Si) and mix well. During application, the amount of mold slag is 3-5% of the weight of molten steel, and the slag is first placed in the mold, and then molten steel is injected for centrifugal casting.
2、液态渣，将为钢水重量5-8％的炉渣，在石墨坩埚内熔化至1550℃，先浇渣后浇钢水进行离心浇注。2. The liquid slag is the slag of 5-8% of the molten steel weight, which is melted to 1550°C in the graphite crucible, and the slag is first poured and then the molten steel is poured for centrifugal casting.
本发明与现有技术相比具有如下优点：Compared with the prior art, the present invention has the following advantages:
1、因为氧化性低、熔化温度低一般为1000-1200℃，渣与金属之间界面张力大，导热系数小，因此，显著改善铸件内部质量，内部组织致密，无夹渣、气孔，缩孔等宏观缺陷，机械性能可达到同钢种锻件水平。在铸件外表面形成均匀渣皮，这种铸件表面光洁可达到电渣重熔水平。1. Because of low oxidation and low melting temperature, generally 1000-1200°C, the interfacial tension between slag and metal is large, and the thermal conductivity is small. Therefore, the internal quality of the casting is significantly improved, the internal structure is dense, and there is no slag inclusion, porosity, and shrinkage cavity. And other macroscopic defects, the mechanical properties can reach the level of forgings of the same steel type. A uniform slag skin is formed on the outer surface of the casting, and the surface of this casting can reach the level of electroslag remelting.
2、由于浇注保护渣是在炉外单独配制而成，因此不会对有衬电渣炉的炉衬产生任何不良影响，因而炉衬寿命长。2. Since the pouring mold slag is prepared separately outside the furnace, it will not have any adverse effects on the lining of the lined electroslag furnace, so the lining life is long.
以下提供本发明实施例。Examples of the present invention are provided below.
实施例一：Embodiment one:
保护渣由高炉水渣，萤石和工业纯碱组成。其配比按重量百分比计：65∶20∶15，高炉水渣主要成分为：CaO、SiO2、MgO、Al2O3，其组分按重量百分比为：34∶44∶10∶12。Mold flux is composed of blast furnace slag, fluorite and industrial soda ash. The ratio is 65:20:15 by weight percentage, the main components of blast furnace slag are: CaO, SiO 2 , MgO, Al 2 O 3 , and its components are 34:44:10:12 by weight percentage.
实施例二：Embodiment two:
保护渣组分同实施例一，基配比为按重量百分比计：70∶15∶15：Mold powder components are the same as in Example 1, and the base ratio is by weight percentage: 70:15:15:
高炉水渣主要成分为：CaO、SiO2、MgO、Al2O3，其组分按重量百分比为37∶47∶8∶8。The main components of blast furnace slag are: CaO, SiO 2 , MgO, Al 2 O 3 , and its composition is 37:47:8:8 by weight percentage.
实施例三：Embodiment three:
保护渣组分同实施例一，其配比按重量百分比计为68∶15∶17。The mold flux components are the same as those in Example 1, and the ratio is 68:15:17 by weight percentage.
高炉水渣主要成分为：CaO、SiO2、MgO、Al2O3，其组分按重量百分比为：35∶45∶8∶12。The main components of blast furnace slag are: CaO, SiO 2 , MgO, Al 2 O 3 , and its composition by weight percentage is: 35:45:8:12.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110010A CN1059364C (en) | 1995-01-17 | 1995-01-17 | Pouring protective slag for electric slag centrifugal casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110010A CN1059364C (en) | 1995-01-17 | 1995-01-17 | Pouring protective slag for electric slag centrifugal casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1127175A CN1127175A (en) | 1996-07-24 |
| CN1059364C true CN1059364C (en) | 2000-12-13 |
Family
ID=5077441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95110010A Expired - Fee Related CN1059364C (en) | 1995-01-17 | 1995-01-17 | Pouring protective slag for electric slag centrifugal casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1059364C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965519A (en) * | 2012-11-22 | 2013-03-13 | 河南省西保冶材集团有限公司 | Carburizing bearing steel electroslag remelting casting powder |
| CN104439194B (en) * | 2014-11-19 | 2017-02-01 | 北京天力创玻璃科技开发有限公司 | Anti-oxidation protective agent for composite roll |
| CN110964976A (en) * | 2019-11-13 | 2020-04-07 | 中煤张家口煤矿机械有限责任公司 | Steel for chain wheel and preparation method and application thereof |
| WO2021142624A1 (en) * | 2020-01-14 | 2021-07-22 | 泰安特夫德新材料科技有限公司 | Method for centrifugally casting composite steel pipe by means of slag |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068764A (en) * | 1992-07-14 | 1993-02-10 | 冶金工业部钢铁研究总院 | Centrifugal casting molten-slag |
| CN1069212A (en) * | 1991-08-12 | 1993-02-24 | 北京科技大学 | Induction centrifugal electroslag casting abnormity hollow casting |
| CN1107766A (en) * | 1994-12-23 | 1995-09-06 | 冶金工业部钢铁研究总院 | centrifugal casting slag |
-
1995
- 1995-01-17 CN CN95110010A patent/CN1059364C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069212A (en) * | 1991-08-12 | 1993-02-24 | 北京科技大学 | Induction centrifugal electroslag casting abnormity hollow casting |
| CN1068764A (en) * | 1992-07-14 | 1993-02-10 | 冶金工业部钢铁研究总院 | Centrifugal casting molten-slag |
| CN1107766A (en) * | 1994-12-23 | 1995-09-06 | 冶金工业部钢铁研究总院 | centrifugal casting slag |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1127175A (en) | 1996-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104057051B (en) | A kind of production method of small square billet continuous casting bearing steel | |
| CN101745615B (en) | Function protecting material of continuous casting crystallizer for large square low-carbon steel | |
| CN102851574B (en) | Heatproof alloy vermicular cast iron and method for preparing same | |
| CN1302126C (en) | Method for producing low-carbon high-sulfur (sulfur-phosphorous) easy-to-cut structural steel continuous casting billet | |
| CN117845143B (en) | High-quality free-cutting die steel casting blank and preparation method thereof | |
| CN101220413A (en) | Technique for smelting ferroferrite with sponge iron | |
| CN1203204C (en) | Shaped dual-layer graphite-cast iron mould | |
| CN1059364C (en) | Pouring protective slag for electric slag centrifugal casting | |
| CN102051492A (en) | Method for removing iron impurity from magnesium alloy by using Al-B intermediate alloy | |
| CN102839292A (en) | Aluminum iron alloy with ultra-low carbon, ultra-low titanium and high silicon contents for deoxidizing aluminum silicon killed steel and manufacturing method of aluminum iron alloy | |
| CN105401063A (en) | As-cast malleable cast iron cylinder sleeve produced through centrifugal casting and production process of as-cast malleable cast iron cylinder sleeve | |
| CN109604540B (en) | Ferrosilicon or ferrochromium ingot casting machine | |
| CN110484809B (en) | Composite hammer head, preparation method thereof and composite hammer head casting model | |
| CN116422853B (en) | A kind of die steel and its continuous casting production method | |
| CN1037246C (en) | Special hollow casting made by inductive electroslag with centrifugal method | |
| CN109082494A (en) | A method of utilizing high purity ferrosilicon powder production silicon strontium alloy | |
| CN101637807B (en) | Big square billet heavy rail steel functional protective material | |
| CN109967706A (en) | Ultra low carbon IF steel function protecting material of continuous casting crystallizer | |
| CN116393666A (en) | Covering slag for continuous casting of high-carbon cutting tool steel and preparation method thereof | |
| RU2697136C1 (en) | Cast iron modification method | |
| CN111996335A (en) | Composition and processing method of cored wire core powder for high-aluminum steel production | |
| RU2002847C1 (en) | Process for manufacturing ferro-silicon-manganese-aluminum alloy | |
| CN1189271C (en) | Spheroidal graphite cast iron mould cavity inoculation block and its production technology | |
| CN106048402B (en) | Heat-resistant anti-fatigue vermicular cast iron, pig mold and preparation method thereof | |
| SU1420058A1 (en) | Cast iron |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |