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Production method for rolling and cogging big cast ingot of high-carbon high-alloy cold-working die steel

A technology of cold working die steel and production method, which is applied in the field of metallurgy, can solve problems such as inability to hot-process and roll billet, and achieve the effects of convenient production organization, reduced metallurgical manufacturing cost, and simple process

Inactive Publication Date: 2012-07-18
宝钢特钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide a production method for hot-working and billeting of large ingots of high-carbon and high-alloy cold-work die steels. The high-carbon and high-alloy cold-work die steels are X210CrW12 High-carbon and high-alloy cold-working die steel, the weight of the large ingot is 2-5t, thus solving the problem that the high-carbon (carbon content ≥ 2%) high-alloy cold-working die steel X210CrW12 large ingot (weight greater than 2t) cannot be hot-processed The technical problem of rolling billets is to roll out qualified X210CrW12 steel billets. At the same time, according to the production method of hot-working billets of high-carbon and high-alloy cold-work die steel large ingots of the present invention, energy consumption and energy consumption can be greatly reduced. Production Costs for Metallurgical Manufacturing

Method used

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  • Production method for rolling and cogging big cast ingot of high-carbon high-alloy cold-working die steel
  • Production method for rolling and cogging big cast ingot of high-carbon high-alloy cold-working die steel
  • Production method for rolling and cogging big cast ingot of high-carbon high-alloy cold-working die steel

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Embodiment 1

[0056] The ingot is heated and homogenized by soaking furnace hot charging (ingot weight 2.31 tons) + hot rolling in the blooming mill (800 rolling mill) for hot processing to produce X210CrW12 billet (140×140mm).

[0057] Ingot type: 2.3t ingot Ingot side length: Steel type: X210CrW12. Bloom specification: 140×140mm

[0058] During the first-fire ingot heating process before the first-fire rolling of the blooming mill, the smelting and casting of 2.31 tons of ingots is hot-sent to the soaking furnace for heating:

[0059] (A) The furnace temperature of the ingot is ≤800°C, and the temperature is kept for 1 hour;

[0060] (B) When heating up, heat up to 1180°C at a rate of ≤100°C / h;

[0061] (C) At a temperature of 1170-1180°C, heat the ingot for 3.0 hours (homogenization treatment), then turn over the ingot one by one, and keep the overturned ingot for another 1.0 hour to reduce the temperature difference between the positive and negative sides of the ingot ;

[0062] (D)...

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Abstract

The invention relates to a production method for rolling and cogging a big cast ingot of high-carbon high-alloy cold-working die steel. The production method comprises 1) hot charging the cast ingot of high-carbon high-alloy cold-working die steel; 2) homogenizing in a soaking pit including a first fire cast ingot heating procedure, which comprises (A) charging the cast ingot at temperature of 600-800 DEG C, and keeping warm for 100-150 minutes; (B) raising the temperature to 1,100-lower than 1,200 DEG C; (C) at the temperature of 1,100-lower than 1,200 DEG C, incubating for 2-5 hours; and (D) keeping the temperature difference of the female face and male face of the cast ingot smaller than 50 DEG C; and a second fire rolled piece melt-down heating, which comprises (A) heating and raising the temperature to 1,100-lower than 1,200 DEG C, and incubating for 2-3 hours; (B) keeping the temperature difference of the female face and male face of the cast ingot smaller than 50 DEG C; and 3) after the two heating procedures, respectively carrying out rolling; wherein (A) the preheating temperature of a roller is 100-200 DEG C; (B) initial rolling temperature is 1,100- lower than 1,200 DEG C, and the final rolling temperature is higher than 900 DEG C; and (C) the biting speed of the roller is 10-40r / min. The production method has the advantages that the process is simple; the ingot mold of the cast ingot is enlarged, and the production cycle is greatly shortened; the energy consumption is greatly reduced; and the cogging yield is increased.

Description

technical field [0001] The present invention relates to a production method for thermal processing of steel materials in the field of metallurgy. Specifically, the present invention relates to a production method for thermal processing of steel materials for cold-working dies. More specifically, the present invention relates to a high-carbon high-alloy cold-working The invention relates to a production method for thermal processing of large ingots of die steel. Background technique [0002] Die steel is a special alloy steel. According to its use, it can be divided into three categories: hot work die steel, cold work die steel and plastic die steel. Cold work die steel can generally be divided into two types: low alloy cold work die steel and high alloy cold work die steel (alloy content greater than 10%). [0003] High-carbon (carbon content ≥ 2%) high-alloy cold-work die steel is a special high-alloy cold-work die steel. High-carbon high-alloy cold-work die steel can with...

Claims

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Application Information

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IPC IPC(8): B21B1/06B21B37/74C21D9/70
Inventor 顾新根郑雨旸张培德王庆亮毕志勇陆超沈滨涛
Owner 宝钢特钢有限公司
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