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Extra-thick steel plate production process of plastic dies steel

A plastic mold steel and production process technology, which is applied in the field of extra-thick plastic mold steel production technology, can solve the problems of long production cycle, low yield, complex process, etc., and achieve low production cost, low level of inclusions, and high furnace temperature. uniform effect

Active Publication Date: 2015-09-16
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To overcome the problems of the existing "die casting-ingot billeting-reversible rolling mill or ingot forging process" such as difficult casting, high mold consumption, low yield, high cost, complicated process, and long production cycle, etc., Especially to improve the yield

Method used

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  • Extra-thick steel plate production process of plastic dies steel
  • Extra-thick steel plate production process of plastic dies steel
  • Extra-thick steel plate production process of plastic dies steel

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] A production process for extra-thick plates of plastic mold steel. The maximum thickness of the mold steel can reach 250mm. The production process adopts a suitable composition design and belongs to medium-carbon high-alloy steel. The chemical composition of the steel plate is C: 0.38-0.42 in mass percentage %, Si: 0.20~0.40%, Mn: 1.40~1.60%, Cr: 1.80~2.00%, Mo: 0.18~0.25%, Als: 0.01~0.04%, P≤0.015%, S≤0.005%, the rest is Fe and unavoidable impurities. Converter steelmaking, φ1000mm large round billets are continuously cast into materials, and pre-hardened plastic mold thick plates with excellent internal quality and good processing performance are obtained through reasonable heating methods, rolling processes and heat treatment systems. The specific process steps are as follows:

[0028] Use a straight arc continuous casting machine ...

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Abstract

The invention relates to an extra-thick steel plate production process of plastic die steel. The maximum thickness of the die steel can achieve 250mm. The production process comprises the following steps: adopting a proper composition design to produce the die steel belonging to middle-carbon high-alloy steel, performing steelmaking in a converter, continuously casting to form the material through a phi1000mm round billet, and obtaining a pre-hardened plastic die thick steel plate with excellent internal quality and good processing performance through a reasonable heating mode, a rolling technology and a heat-treating system. The steel plate is uniform in tissue, uniform in performance, and capable of achieving JB / 4730.3-2005 standard I level, low in occluded foreign substance, and good in steel plate processing performance.

Description

technical field [0001] The invention relates to a billet post-treatment process, in particular to a production process for extra-thick plastic mold steel using a large round billet. Background technique [0002] With the rapid development of the plastics industry, the demand for plastic mold steel has increased sharply, and the market demand for pre-hardened plastic mold steel is relatively large. Since the pre-hardened plastic mold steel reaches the hardness and performance required by the user when it is supplied by the manufacturer, the user can directly process it into a mold after obtaining the material, and it can be used directly without quenching and tempering heat treatment. It avoids defects such as deformation, cracking and decarburization caused by quenching and tempering heat treatment after mold processing, and has good strength and toughness, cutting performance and polishing performance, dimensional accuracy and other advantages. Pre-hardened plastic mold ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02C22C38/38C22C38/22
Inventor 何广霞黄军李国忠李经涛阳日隆周海燕
Owner JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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