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Quenching and tempering pre-hardening treatment method for martensitic stainless steel large steel plate

A martensitic stainless steel and processing method technology, applied in the field of pretreatment, can solve problems such as high equipment requirements and serious environmental pollution, and achieve the effects of less environmental pollution, good metallographic structure and hardness of steel plates, and preventing cracking

Active Publication Date: 2019-02-05
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Quenching and tempering pre-hardening treatment method for martensitic stainless steel large steel plate
  • Quenching and tempering pre-hardening treatment method for martensitic stainless steel large steel plate
  • Quenching and tempering pre-hardening treatment method for martensitic stainless steel large steel plate

Examples

Experimental program
Comparison scheme
Effect test

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 i...

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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...

Claims

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Application Information

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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
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