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Stainless steel 431 smelting method

A smelting method and stainless steel technology, applied in electric furnaces, furnaces, and the improvement of process efficiency, can solve the problems of uneven quality and density, affecting hardness, and high impurity residues in steel, achieve uniform Rockwell hardness distribution, and eliminate creep stress. , the effect of reducing impurities

Inactive Publication Date: 2011-09-14
胡锦耀
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For stainless steel 431, using this process for smelting, the steel produced has high residual impurities, uneven quality and density, which affects its hardness, thus greatly affecting the quality of rolled steel. When used as special parts such as bearings and shafts , shorter life

Method used

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Embodiment Construction

[0016] In order to facilitate a further understanding of the present invention, the present invention will now be described in detail in conjunction with specific embodiments.

[0017] After the stainless steel iron material is rough smelted in the electric furnace and refined in the AOD furnace, the refined steel cup is further processed as follows:

[0018] ① Heat the out-of-the-furnace steel cup to 1600-1700°C for rapid cooling and solid solution treatment;

[0019] ② Put the above solution treated steel cup into the warehouse for 90-150 days; after completion, reheat the steel cup to 1350-1400°C, and let the steel cup cool naturally;

[0020] ③ High-frequency machine secondary refining:

[0021] a) Turn the steel cup upside down, place it on the clamp at the port of the high-frequency machine to clamp the mouth of the cup, raise the steel cup, and place a steel mold underneath;

[0022] b) Turn on the power, the steel cup melts slowly, and control the current intensity s...

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PUM

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Abstract

The invention discloses a stainless steel 431 smelting method. An electric furnace+AOD (Argon Oxygen Decarburization) furnace smelting technology is adopted; after stainless steel is refined in the AOD furnace, a discharging steel cup is heated to 1600-1700DEG C; quenching solid dissolving is carried out; after the steel cup is stored in a storage for 90-150 days, the steel cup is reheated to 1350-1500DEG C; the steel cup is naturally cooled and is secondarily refined by a high-frequency machine; the discharging steel cup is reheated to 1350-1400DEG C; after the steel cup is subjected to quenching solid dissolving, surface processing is carried out; and the steel cup is stored in a storage for 30-60 days. After above treatment, impurity residues in the stainless steel can be greatly reduced, the quality and density distribution of the stainless steel is regulated, and stainless steel quality is improved.

Description

technical field [0001] The invention relates to a stainless steel smelting method, in particular to a stainless steel 431 smelting method. Background technique [0002] At present, the smelting process of stainless steel is mainly electric furnace + AOD furnace. The electric furnace melts scrap steel, alloy and part of the molten iron, and then enters the AOD furnace for refining. For stainless steel 431, using this process for smelting, the steel produced has high residual impurities, uneven quality and density, which affects its hardness, thus greatly affecting the quality of rolled steel. When used as special parts such as bearings and shafts , with a shorter lifespan. Therefore, it is necessary to develop a new smelting method for stainless steel 431, reduce the residue of smelting impurities, and improve the quality of stainless steel 431 after refining. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the present invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C21C5/52
CPCY02P10/20
Inventor 胡锦耀
Owner 胡锦耀