WO2018001093A1 - Vibration-resistant stainless structural steel - Google Patents
Vibration-resistant stainless structural steel Download PDFInfo
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- WO2018001093A1 WO2018001093A1 PCT/CN2017/088224 CN2017088224W WO2018001093A1 WO 2018001093 A1 WO2018001093 A1 WO 2018001093A1 CN 2017088224 W CN2017088224 W CN 2017088224W WO 2018001093 A1 WO2018001093 A1 WO 2018001093A1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
Definitions
- the invention relates to the technical field of steel metallurgy, in particular to a high-strength earthquake-resistant stainless structural steel.
- Existing stainless steel varieties include austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, duplex stainless steel, and 200 series stainless steel.
- Ferritic and austenitic stainless steels in these stainless steels are generally used only for the manufacture of vessels and panels due to their low strength. When used as a structural material, since the strength is low, the amount can be increased, and the cost is greatly increased.
- Duplex stainless steel has good comprehensive performance, but the heat treatment process is difficult and the cost is too high, which is 2-3 times that of austenitic stainless steel, which limits its wide application.
- the 200 series stainless steel is widely used due to its low price, but due to its low strength, the comprehensive mechanical properties cannot meet the requirements of becoming a structural material. Martensitic stainless steel cannot be used as structural steel due to its high brittleness and welding difficulty due to its structural properties. In the past stainless steel systems, only duplex stainless steel could be used as building structural steel.
- the technical problem to be solved by the present invention is to provide a high-strength earthquake-resistant stainless structural steel.
- the main components of the stainless structural steel are: Cr content 8-15%, Ni content 1-4%, P content 0.03-0.6%, C content less than 0.1%, Fe balance.
- the stainless structural steel does not contain S, and the control O content is less than 30 ppm.
- the metallographic structure of the stainless structural steel is one or two of sorbite and bainite, and the grain size is controlled at 7-12.
- the grade of inclusions in stainless structural steel is controlled according to GB/T 10561-2005 in the four categories A, B, C and D are not more than 1.5.
- the stainless steel structural steel has a breaking strength of >600 MPa, a yield strength of >450 MPa, and an elongation of >18%.
- the stainless steel After the stainless steel is smelted by electric furnace and converter, it should be refined by AOD smelting and ladle furnace (LF), decarburization, deoxidation and desulfurization of the molten steel, and the steel is tempered and heat-treated.
- LF AOD smelting and ladle furnace
- the heat treatment process is natural cooling after rolling, and is naturally tempered at 600-770 °C.
- the stainless structural steel controls the mechanical properties of the stellite stainless steel by heat treatment, and can obtain desired properties in a wide range.
- Figure 1 is a stress-strain curve 1 of a high-strength earthquake-resistant stainless structural steel of the present invention
- Fig. 3 is a third stress-strain curve of the high-strength earthquake-resistant stainless steel structural steel of the present invention.
- the invention provides a high-strength earthquake-resistant stainless structural steel for the problems of low strength and poor corrosion resistance of the existing structural steel.
- the stainless structural steel has a Cr content of 8-15%, a Ni content of 1-4%, a P content of 0.03-0.6%, a C content of less than 0.1%, and a Fe balance, wherein the stainless structural steel does not contain S, and the control
- the O content is less than 300 ppm.
- the metallographic structure of the obtained stainless structural steel is sorbite, the grain size is 9 grades, and the grade of inclusions is controlled according to GB/T 10561-2005 in the four categories A, B, C, and D are not greater than 1.5.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
本发明涉及钢铁冶金技术领域，特别是指一种高强抗震不锈结构钢。The invention relates to the technical field of steel metallurgy, in particular to a high-strength earthquake-resistant stainless structural steel.
不锈钢现有品种包括奥氏体不锈钢、铁素体不锈钢、马氏体不锈钢、双相不锈钢、200系不锈钢。这些不锈钢中的铁素体和奥氏体不锈钢由于其强度较低，一般只用于制作器皿、面板。在用作结构材料时，由于其强度较低，只能加大用量，使成本大幅度增加。双相不锈钢有良好的综合性能，但热处理工艺难度较大，且成本过高，是奥氏体不锈钢的2-3倍，使其广泛应用受到限制。200系不锈钢由于价格低廉得到广泛应用，但是也由于强度低，综合力学性能不能满足成为结构材料的要求。马氏体不锈钢由于其组织特性导致的高脆性和焊接难度，不能够用作结构钢。在过去的不锈钢体系当中，只有双相不锈钢可以成为建筑结构钢。Existing stainless steel varieties include austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, duplex stainless steel, and 200 series stainless steel. Ferritic and austenitic stainless steels in these stainless steels are generally used only for the manufacture of vessels and panels due to their low strength. When used as a structural material, since the strength is low, the amount can be increased, and the cost is greatly increased. Duplex stainless steel has good comprehensive performance, but the heat treatment process is difficult and the cost is too high, which is 2-3 times that of austenitic stainless steel, which limits its wide application. The 200 series stainless steel is widely used due to its low price, but due to its low strength, the comprehensive mechanical properties cannot meet the requirements of becoming a structural material. Martensitic stainless steel cannot be used as structural steel due to its high brittleness and welding difficulty due to its structural properties. In the past stainless steel systems, only duplex stainless steel could be used as building structural steel.
当今对钢结构材料的长寿命、高强度、易焊接、可接受成本的要求不断增加，成为当今钢铁材料领域创造发明的主攻方向之一。Today, the requirements for long life, high strength, easy welding and acceptable cost of steel structural materials are increasing, which has become one of the main directions for the invention of steel materials in the field.
根据考察和文献资料，国际上逐步提高抗震设防等级已经是一个重要方向。从建筑安全的需要钢要有高强度，但是过高的强度带来钢的屈强比高，钢脆性高，在地震发生时容易出现脆性坍塌。所以获得低屈强比、高延伸率是当下钢铁材料的攻关目标。同时为了是建筑结构的寿命更长，更适应于各类腐蚀环境，采用不锈钢作为建筑材料已经成为趋势。According to the investigation and literature, the international improvement of the seismic fortification level has become an important direction. Steel needs high strength from the safety of construction, but too high strength leads to high yield ratio of steel, high brittleness of steel, and brittle collapse in the event of an earthquake. Therefore, obtaining a low yield ratio and high elongation is the goal of the current steel materials. At the same time, in order to make the building structure last longer and more suitable for various corrosive environments, the use of stainless steel as a building material has become a trend.
美国、日本在这方面取得一些成就，抗震建筑成为当今主流建筑。我国建筑方面地震设防等级还比较低。目前仍然大部分设定在七级以下。 The United States and Japan have made some achievements in this regard, and earthquake-resistant buildings have become mainstream buildings today. The level of seismic fortification in China's construction is still relatively low. Most of them are still set below level 7.
发明内容Summary of the invention
本发明要解决的技术问题是提供一种高强抗震不锈结构钢。该不锈结构钢主要成分为：Cr含量8-15％，Ni含量1-4％，P含量0.03-0.6％，C含量小于0.1％，Fe余量。The technical problem to be solved by the present invention is to provide a high-strength earthquake-resistant stainless structural steel. The main components of the stainless structural steel are: Cr content 8-15%, Ni content 1-4%, P content 0.03-0.6%, C content less than 0.1%, Fe balance.
其中，不锈结构钢中不含S，且控制O含量小于30ppm。Among them, the stainless structural steel does not contain S, and the control O content is less than 30 ppm.
不锈结构钢的金相组织为索氏体、贝氏体中的一种或两种，晶粒度控制在7-12级。不锈结构钢中夹杂物的级别按照GB/T 10561-2005控制在A、B、C、D四类均为不大于1.5。不锈结构钢的断裂强度>600Mpa，屈服强度>450MPa，延伸率>18％。The metallographic structure of the stainless structural steel is one or two of sorbite and bainite, and the grain size is controlled at 7-12. The grade of inclusions in stainless structural steel is controlled according to GB/T 10561-2005 in the four categories A, B, C and D are not more than 1.5. The stainless steel structural steel has a breaking strength of >600 MPa, a yield strength of >450 MPa, and an elongation of >18%.
该不锈结构钢通过电炉、转炉冶炼后应当经过AOD冶炼、钢包炉(LF)精炼，对钢水进行脱碳、脱氧、脱硫，所制得钢材回火热处理制成。其中，热处理工艺为轧制后自然冷却，在600-770℃自然回火。After the stainless steel is smelted by electric furnace and converter, it should be refined by AOD smelting and ladle furnace (LF), decarburization, deoxidation and desulfurization of the molten steel, and the steel is tempered and heat-treated. Among them, the heat treatment process is natural cooling after rolling, and is naturally tempered at 600-770 °C.
本发明的上述技术方案的有益效果如下：The beneficial effects of the above technical solution of the present invention are as follows:
该不锈结构钢通过热处理控制索氏体不锈钢的机械性能，可以在较大范围获得理想的性能。克服了奥氏体不锈钢、铁素体不锈钢的强度不高的问题；克服了普通结构钢锈蚀问题；克服了高强钢双相不锈钢的高成本问题,获得了高的断后延伸率和低的屈强比，同时具有高强度、耐锈蚀、屈强比低、断后延伸率高的特点，是一种具有良好加工性能的结构钢，具有很好的焊接性能。The stainless structural steel controls the mechanical properties of the stellite stainless steel by heat treatment, and can obtain desired properties in a wide range. Overcoming the problem of low strength of austenitic stainless steel and ferritic stainless steel; overcoming the corrosion problem of ordinary structural steel; overcoming the high cost of high-strength steel duplex stainless steel, obtaining high elongation after fracture and low yield strength Compared with the characteristics of high strength, rust resistance, low yield ratio and high elongation after fracture, it is a structural steel with good processing properties and has good welding performance.
图1为本发明的高强抗震不锈结构钢的应力应变曲线一；Figure 1 is a stress-strain curve 1 of a high-strength earthquake-resistant stainless structural steel of the present invention;
图2为本发明的高强抗震不锈结构钢的应力应变曲线二；2 is a stress-strain curve 2 of the high-strength earthquake-resistant stainless structural steel of the present invention;
图3为本发明的高强抗震不锈结构钢的应力应变曲线三。 Fig. 3 is a third stress-strain curve of the high-strength earthquake-resistant stainless steel structural steel of the present invention.
为使本发明要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。The technical problems, the technical solutions, and the advantages of the present invention will be more clearly described in the following description.
本发明针对现有的结构钢强度低、耐腐蚀性差等问题，提供一种高强抗震不锈结构钢。The invention provides a high-strength earthquake-resistant stainless structural steel for the problems of low strength and poor corrosion resistance of the existing structural steel.
该不锈结构钢中Cr含量8-15％，Ni含量1-4％，P含量0.03-0.6％，C含量小于0.1％，Fe余量，其中，不锈结构钢中不含S，且控制O含量小于300ppm。The stainless structural steel has a Cr content of 8-15%, a Ni content of 1-4%, a P content of 0.03-0.6%, a C content of less than 0.1%, and a Fe balance, wherein the stainless structural steel does not contain S, and the control The O content is less than 300 ppm.
实验中，通过铁水电炉、转炉冶炼，经过出钢、合金化后，进行AOD脱碳精炼，调整合金成，再进行LF精炼、深度脱氧、脱硫和控制夹杂物，调整钢水的温度和成分，进行连铸成板坯、圆坯、方坯等，再经过轧制成板材棒材等，最后在600-700℃保温后自然回火热处理制得不锈结构钢。In the experiment, through the molten iron electric furnace, converter smelting, after tapping and alloying, AOD decarburization refining, adjusting the alloy formation, and then performing LF refining, deep deoxidation, desulfurization and controlling inclusions, adjusting the temperature and composition of the molten steel, Continuous casting into slabs, round billets, billets, etc., and then rolling into sheet metal, etc., and finally tempered heat treatment at 600-700 ° C to obtain stainless steel.
该制得的不锈结构钢的金相组织为索氏体，晶粒度为9级，夹杂物的级别按照GB/T 10561-2005控制在A、B、C、D四类均为不大于1.5。The metallographic structure of the obtained stainless structural steel is sorbite, the grain size is 9 grades, and the grade of inclusions is controlled according to GB/T 10561-2005 in the four categories A, B, C, and D are not greater than 1.5.
该不锈结构钢热处理后的机械性能如下表1所示，其应力应变曲线如图1、图2和图3所示。The mechanical properties of the stainless structural steel after heat treatment are shown in Table 1 below, and the stress-strain curves are shown in Figs. 1, 2 and 3.
表1不锈结构钢热处理后机械性能Table 1 Mechanical properties of stainless steel structural steel after heat treatment
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明所述原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。 The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should also be considered as the scope of protection of the present invention.
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| CN201610504341.1A CN107557696B (en) | 2016-06-30 | 2016-06-30 | A kind of anti-seismic stainless steel |
| CN201610504341.1 | 2016-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116516267A (en) * | 2023-03-21 | 2023-08-01 | 王平 | Solid solution and nano-reinforced sorbite high-strength stainless structural steel and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111020364A (en) * | 2018-10-09 | 2020-04-17 | 中国电力科学研究院有限公司 | High-strength stainless steel fastener wire for power transmission and transformation engineering and production method thereof |
| CN111020401A (en) * | 2018-10-09 | 2020-04-17 | 中国电力科学研究院有限公司 | Stainless steel for power transmission and transformation engineering and production method thereof |
| CN110239165B (en) * | 2019-07-08 | 2020-06-19 | 巩义市永裕节能新材料厂 | High-strength stainless steel hollow composite plate for building construction or template and manufacturing method thereof |
| CN110408854B (en) * | 2019-08-14 | 2020-10-20 | 王平 | Bainite stainless steel and preparation method thereof |
| CN110512143A (en) * | 2019-09-09 | 2019-11-29 | 王平 | A kind of anti-seismic and fire-resistant high-strength and tough stainless structural steel and its preparation method |
| CN110578101B (en) * | 2019-10-14 | 2020-08-07 | 王平 | Marine tempered sorbite high-strength and high-toughness stainless structural steel and preparation method thereof |
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| CN103014549B (en) * | 2012-12-26 | 2015-11-18 | 振石集团东方特钢股份有限公司 | A kind of high-performance diphase stainless steel and working method thereof |
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| US4295769A (en) * | 1980-02-28 | 1981-10-20 | Armco Inc. | Copper and nitrogen containing austenitic stainless steel and fastener |
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| CN116516267A (en) * | 2023-03-21 | 2023-08-01 | 王平 | Solid solution and nano-reinforced sorbite high-strength stainless structural steel and preparation method thereof |
| CN116516267B (en) * | 2023-03-21 | 2024-03-29 | 王平 | Solid solution and nano-reinforced sorbite high-strength stainless structural steel and preparation method thereof |
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| CN107557696A (en) | 2018-01-09 |
| CN107557696B (en) | 2019-02-26 |
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