A kind of quenching and tempering prehardening treatment method of martensitic stainless steel large steel plate
The technology of a martensitic stainless steel and a treatment method is applied in the field of pretreatment, which can solve the problems of high equipment requirements and serious environmental pollution, and achieve the effects of less environmental pollution, good metallographic structure and hardness of the steel plate, and not easy to crack.
Active Publication Date: 2020-03-06
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology
[0004] However, the current oil quenching process in the prior art has high requirements for equipment and serious environmental pollution. Therefore, it is desired to obtain a quenching and tempering pre-hardening treatment method, which can be used for large martensitic stainless steel plates (eg: BM4Cr13) Water quenching pre-hardening treatment, the metallographic structure and hardness value of the steel plate obtained after treatment meet the production requirements
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Embodiment 1-6
[0030] Table 1 lists the mass percentages of each chemical element in the large martensitic stainless steel steel plates of Examples 1-6.
[0031] Table 1. (wt%, the balance is Fe and other unavoidable impurity elements except P and S)
[0032] Numbering C Si mn S P Cr Ni Example 1 0.3922 0.418 0.58 0.0024 0.0148 12.813 0.063 Example 2 0.4081 0.434 0.567 0.0007 0.0151 12.938 0.063 Example 3 0.3952 0.444 0.549 0.0012 0.0155 12.734 0.061 Example 4 0.4173 0.423 0.495 0.0008 0.0175 12.739 0.061 Example 5 0.4068 0.457 0.556 0.0012 0.0105 12.828 0.059 Example 6 0.3935 0.455 0.526 0.0014 0.0124 12.55 0.059
[0033] The martensitic stainless steel large-scale steel plate of embodiment 1-6 is processed by quenching and tempering prehardening treatment method described in the present invention, comprises steps:
[0034] (1) Anneal the rolled steel plate: heat up to the annealing temperature of...
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Abstract
The invention discloses a quenching and tempering pre-hardening treatment method for a martensitic stainless steel large steel plate. The quenching and tempering pre-hardening treatment method comprises the following steps of (1) annealing a rolled steel plate; (2) water quenching; and (3) tempering and quenching and tempering treatment. When the martensitic stainless steel large steel plate is treated according to the quenching and tempering pre-hardening treatment method of the martensitic stainless steel large steel plate, the steel plate is not easy to crack, and the obtained steel plate has a good metallurgical structure and good hardness. As the quenching and tempering pre-hardening treatment method adopts water quenching instead of oil quenching, compared with the prior art, the production cost is greatly saved; and in addition, as oil quenching is not adopted, the environmental pollution is small.
Description
technical field [0001] The invention relates to a pretreatment method, in particular to a prehardening treatment method. Background technique [0002] At present, the use of BM4Cr13 (4Cr13) corrosion-resistant plastic mold steel large steel plate pre-hardened delivery requirements, but because BM4Cr13 (4Cr13) is a high-Cr high-alloy steel, and BM4Cr13 (4Cr13) is martensitic stainless steel, for martensitic stainless steel In terms of size, the larger the size, the more prone to cracking and fracture in water quenching. For this type of steel, the hardness requirement is between 30-36HRC, and the size requirements of the steel plate: the thickness meets 60-200mm, the width meets 1150-1350mm, and the length meets 2000-10000mm. [0003] Therefore, for large martensitic stainless steel plates (for example: BM4Cr13), the quenching and tempering treatment method of oil quenching + tempering process is generally used, because the oil quenching process can prevent cracking, so that...
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IPC IPC(8): C21D1/25C21D1/60C21D6/00
CPCC21D1/25C21D1/60C21D6/004
Inventor 周金方吴时清
Owner BAOSHAN IRON & STEEL CO LTD