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Cast steel materials

A technology of casting steel and elements, applied in heat treatment equipment, heat treatment process control, manufacturing tools, etc., can solve the problems of large crack tendency and difficulty in producing high-quality steel castings

Active Publication Date: 2007-05-30
郑州煤机格林材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional ZG27SiMn cast steel has high strength, and its biggest feature is good weldability. It can be used in low temperature or tempered state according to different requirements. The tendency is very large, and it is difficult to produce high-quality steel castings with stable performance

Method used

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Embodiment Construction

[0010] The cast steel material of the present invention is characterized in that it contains: C element 0.2-0.29, Si element 0.4-0.6, Mn element 0.8-1.1, Cr element 0.35-0.5, Ni element≤0.15, Mo element in weight percent ≤0.20, S element ≤0.040, P element ≤0.040; Normalizing once after casting, the temperature is 920°C±10°C, keep warm for 2 hours, then air cool, then put into the furnace and heat to 880°C, heat it for 1 hour and then take it out of the furnace to quench water to Room temperature, then tempering, the tempering temperature is 580°C±10°C, after holding for 2 hours, it can be cooled slowly with the furnace at 350°C, and then it can be taken out of the furnace and cooled naturally.

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PUM

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Abstract

The invention discloses a making method of cast-steel material, which comprises the following steps: allocating raw material with 0.2-0.29% C, 0.4-0.6% Si, 0.8-1.1% Mn, 0.35-0.5% Cr, not more than 0.15% Ni, not more than 0.20% Mo, not more than 0.040% S and not more than 0.040% P; casting once at 920+-10 deg.c; insulating 2h; cooling; heating to 880 deg.c; insulating 1h; quenching to indoor temperature; tempering at 580+-10 deg.c; insulating 2h; cooling to 350 deg.c; discharging. The cast steel (ZG30Cr06A) possesses excellent strength, which improves plasticity and impacting flexibility.

Description

technical field [0001] The invention relates to cast steel materials, in particular to a low-alloy, high-strength cast steel material. Background technique [0002] Steel castings are often used for some parts such as column sockets and connectors on the high-end brackets dedicated to coal mines. Since the support has to bear the weight and static load of coal and stones falling from the roof of the gob and the lower rock strata and the alternating impact dynamic load generated when the roof falls, the critical value of the brittle impact fracture resistance of the roof beam and column socket is required higher. Conventional ZG27SiMn cast steel has high strength, and its biggest feature is good weldability. It can be used in low temperature or tempered state according to different requirements. The tendency is very large, and it is not easy to produce high-quality steel castings with stable performance. Contents of the invention [0003] The object of the present invent...

Claims

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Application Information

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IPC IPC(8): C22C38/44C21D1/28C21D1/18C21D11/00
Inventor 高有进徐宗林杨以淳杨建国冯学俭顾建平阎予生秦宝进
Owner 郑州煤机格林材料科技有限公司
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