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Manufacturing method for Z210CrW12 ingots by rolling and cogging

A x210crw12, production method technology, applied in the direction of metal rolling, etc., can solve the problems of long production cycle and low metal billet rate, and achieve the effects of shortened production cycle, high metal billet rate and stable quality

Inactive Publication Date: 2005-02-23
SHANGHAI IRON & STEEL CO LTD NO 5 BAOSHAN IRON & STEEL GRP
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention develops a production method for rolling and billeting X210CrW12 steel ingots, uses a roughing mill instead of a forging press for thermal processing and billeting, and rolls qualified X210CrW12 steel billets, which solves the problem of long production cycle of X210CrW12 high-alloy tungsten-containing cold-working die steel. The problem of low metal billet rate greatly reduces the production cost of metallurgical manufacturing and meets user requirements and market needs

Method used

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Embodiment Construction

[0023] Specific implementation plan

[0024] An iron and steel company implemented the patent of the present invention, using a soaking furnace to heat X210CrW12 electric furnace steel ingots (ingot weight 1.20 tons) + blooming mill (800 rolling mill) hot-working billeting process to produce X210CrW12 high-alloy tungsten-containing cold work die billets (140×140mm). Soaking furnace heating steel ingot: (1) The ingot entering temperature is 440℃, and the temperature is kept for 120 minutes; (2) It is heated at a rate of 60℃ / h to 1165~1175℃; (3) The temperature is 1165~1175℃, and the temperature is 4.5 During the heat preservation period, the steel ingot is turned over to make the temperature of the steel ingot uniform, and the temperature difference between the positive and negative surfaces of the steel ingot is ≤25℃; (4) The steel ingot is discharged from the soaking furnace and enters the blooming mill for hot processing and rolling. Rolling and billeting of the blooming mill: (...

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Abstract

A rolling cogging manufacturing method for X210CrW12 steel ingot includes: 1) heating by uniform heating furnace, keeping temperature for 150 mins with entering temperature of steel ingot is less than or equal to 450deg.C, heating to 1170deg.C and keeping temperature for 4.5 hrs with speed is less than or equal to 80deg.C / h, turning over steel ingot and drawing charge with positive and negative face temperature differential is less than or equal to 25deg.C; 2) rolling by rolling mill, closing cooled water of roller before rolling and roller preheating; first rolling with roller speed is less than or equal to 20 / min, beginning temperature is greater than or equal to 1130deg.C, finishing temperature is greater than or equal to 1060deg.C, rolling passage 40 and drafts is less than or equal to 30mm; billet melting down and distressing annealing heat treating. It achieves low cost, simple process and good quality.

Description

Technical field [0001] The invention relates to a production method of hot-worked billeting of die steel in the metallurgical industry, in particular to a production method of hot-worked billeting of high-alloy cold-worked die steel. Background technique [0002] Die steel is a special alloy steel. According to its purpose, it can generally be divided into two categories: hot work die steel and cold work die steel; according to the alloy ratio (that is, alloy content), it can generally be divided into low alloy die steel And high-alloy (alloy content greater than 12%) die steel two major categories. High-alloy cold work die steel is a special die steel that can withstand heavier loads and has high wear resistance. It is widely used in the manufacture of cold stamping dies, cold heading dies, cold extrusion dies, wire drawing dies, and thread rolling Die and other mold materials. [0003] X210CrW12 high-alloy tungsten-containing cold work die steel is a special high-alloy cold wor...

Claims

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Application Information

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IPC IPC(8): B21B1/00B21B3/00C21D8/00
Inventor 续维顾新根陈新建黄俊春王庆亮沈燕源
Owner SHANGHAI IRON & STEEL CO LTD NO 5 BAOSHAN IRON & STEEL GRP
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