Production technology of cold working die steel material

Abstract

The invention provides a cold-working die steel material, which comprises the following trace elements in percentage by weight: 0.95 to 1.05 percent of C, 0.35 to 0.45 percent of Mn, 0.55 to 0.65 percent of Si, 7.55 to 8.5 percent of Cr, 0.45 to 0.55 percent of Mo, 0.35 to 0.45 percent of V, less than or equal to 0.025 percent of S, and less than or equal to 0.025 percent of P. The cold-working die steel material has simple technical process and easily-controlled operation, adopts alloying and modification treatment, has good hardenability, stable temper resistance, higher wear resistance andgood processability, can improve work efficiency, reduce production cost, reduce or avoid moulds from breaking and cracking, and has long service life, high performance-price ratio and wide application.

Description

Manufacturing process of cold work die steel material technical field The invention belongs to the technical field of metal materials and processing, in particular to the scope of mold manufacturing and use, and relates to cold-working die steel and its manufacturing method. Background technique Since the middle of the 20th century, since the world's technological powers used high-alloy steel to make molds, the manufacturing technology of mold steel has been developing continuously. The excellent performance of high-alloy steel has been recognized by the society, but problems in the use and manufacturing process have also been prepared Troubled by people, such as brittleness, difficulty in cold working, serious cracking tendency in heat treatment, small and difficult forging interval, easy aggregation of carbides into blocks, serious soft spots, etc. In the process of mold manufacturing and use, reducing the difficulty of manufacturing, improving work efficiency, reducing ...

AI Technical Summary

Problems solved by technology

In the past, people often used Cr12 and Cr12MoV as the first choice for cold work die steel, especially Cr12 is a high-carbon high alloy. Although it has high strength and hardness after heat treatment, its cracking phenomenon is more serious, which is the main reason for mold failure.

In addition, the forging process range of Cr12 is relatively narrow, and the carbides are not easily broken or distributed in blocks, which is easy to cause stress concentration, so that the mold is damaged by non-human factors, thus forming Cr12. The original price is not high, but the manufacturing and use costs are not high. low set

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