Ferrite stainless steel CB30 material and heat treatment process thereof
A CB30, stainless steel technology, applied in the field of stainless steel material processing, can solve the problems of unstable mechanical properties, low yield strength, and easy cracking of CB30 ferritic stainless steel, so as to reduce the cost of metal charge, meet the mechanical properties, and reduce brittleness. cracking effect
Active Publication Date: 2019-10-18
鹰普(中国)有限公司
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Problems solved by technology
[0006] In order to solve the problems of unstable mechanical properties, low yield strength, low elongation, poor toughness and easy cracking of CB30 ferritic stainless steel caused by the existing heat treatment process, the invention provides a ferritic stainless steel CB30 material and its heat treatment process , which optimizes the chemical composition of the material, improves the heat treatment process, enhances the unstable mechanical properties of the material, increases the yield strength, elongation and toughness, and reduces cracking
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[0015] A ferritic stainless steel CB30 material, characterized in that the composition of each element: C≤0.30, Si≤1.00, Mn≤1.00, P≤0.04, S≤0.04, 18.00≤C≤21.00, Ni≤2.00,.
[0016] A ferritic stainless steel CB30 material heat treatment process, it comprises the following steps:
[0017] (1) Raise the temperature of the ferritic stainless steel CB30 material to 770-800°C, then keep it warm for 0.5h, and use quenching oil as the cooling liquid for cooling;
[0018] (2) Heat the cooled ferritic stainless steel CB30 material to 600-650°C, hold it for 30 minutes for tempering treatment, and then cool it to room temperature by air cooling after the heat preservation is completed. The temperature cooling rate must be greater than or equal to 200°C / min.
[0019] The following is a detailed description of the four test sticks:
[0020] The chemical composition of the CB30 material of the four existing test bars is shown in the table below
[0021]
[0022] The data obtained after ...
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The invention relates to the technical field of stainless steel material processing, in particular to a ferrite stainless steel CB30 material and a heat treatment process thereof. The material comprises not larger than 0.30 of C, not larger than 1.00 of Si, not larger than 1.00 of Mn, not larger than 0.04 of P, not larger than 0.04 of S, larger than or equal to 18.00 and smaller than or equal to 21.00 of C, and not larger than 2.00 of Ni. The heat treatment process comprises the following steps that firstly, the ferrite stainless steel CB30 material is subjected to temperature rise to 770 to 800 DEG C, heat preservation is carried out for 0.5 h, and cooling liquid is used for cooling; and secondly, the cooled ferrite stainless steel CB30 material is subjected to temperature rise to 600 to650 DEG C, heat preservation is carried out for 30 min, tempering treatment is carried out, after heat preservation is finished, through air cooling, the temperature is reduced to the normal temperature, and the temperature cooling speed needs to be larger than or equal to 200 DEG C / min.
Description
technical field [0001] The invention relates to the technical field of stainless steel material processing, in particular to a ferritic stainless steel CB30 material and a heat treatment process thereof. Background technique [0002] CB30 is a ferritic stainless steel material. Ferritic stainless steel has high yield strength, low plasticity, high thermal conductivity, low expansion coefficient, and excellent corrosion resistance and cracking performance. [0003] element C Si mn P S Cr Ni ingredients ≤0.30 ≤1.00 ≤1.00 ≤0.040 ≤0.040 18.00-21.00 ≤2.00 [0004] The pitting corrosion resistance and crevice corrosion resistance of ferritic stainless steel are better than austenitic stainless steel, but ferritic stainless steel is not as good as austenitic stainless steel in reducing acidic medium. Ferritic stainless steel is ferromagnetic and the cost is relatively low. Ferritic stainless steel is brittle at 475°C and high temperature. It als...
Claims
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Login to View More IPC IPC(8): C22C38/02C22C38/04C22C38/40C21D1/18C21D6/00
CPCC21D1/18C21D6/004C21D6/005C21D6/008C22C38/02C22C38/04C22C38/40
Inventor 贾淑利杨渭鹏陈光颜宏班景江吴雪岩
Owner 鹰普(中国)有限公司