Manufacturing method for Z210CrW12 ingots by rolling and cogging

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...

AI Technical Summary

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