Steel for stamping die and method of manufacture

Abstract

The invention discloses steel used for punching die and a manufacturing method thereof. The weight percentages of the chemical composition of the steel are as follows: C, 0.35 to 0.40 wt percent; Mn, 0.30 to 0.60 wt percent; Cr, 4.70 to 5.50 wt percent; Si, 0.30 to 0.50 wt percent; Mo, 3.00 to 4.00 wt percent; V, 0.40 to 0.70 wt percent; Cu, less than or equal to 0.30 wt percent; Ni, less than orequal to 0.30 wt percent; P, less than or equal to 0.020 wt percent; S, less than or equal to 0.015 wt percent; the rest, Fe and inevitable impurity elements. The manufacturing method mainly comprises the following steps: 1) casting of ingots; 2) heating the ingots in a blooming mill furnace and carrying out heat preservation for three to five hours; 3) rolling and forging into products. The steel used for punching die produced by the invention has the advantages of improving performance indexes significantly, lowering production cost and improving the economic benefit of the products.

Description

technical field [0001] The invention relates to a stamping die steel and a metallurgical manufacturing method thereof, in particular to a stamping die steel for manufacturing cold stamping forming dies in the machinery industry and a metallurgical manufacturing method thereof. Background technique [0002] Die steel can generally be divided into three types: hot work die steel, cold work die steel and plastic die steel. The stamping die steel used in the machinery industry to manufacture cold forming stamping dies is one of the more commonly used cold work die steels. Widely used in the manufacture of stamping dies; hot work die steel is mainly used for the manufacture of hot forming dies, generally for the manufacture of aluminum alloy die-casting dies at high temperatures; plastic die steel is mainly used for the manufacture of plastic forming dies. The stamping die steel currently used in our country adopts the national standard GB / T1299-2000 alloy tool steel, the materia...

AI Technical Summary

Problems solved by technology

[0006] 2) The forging blanking process is adopted, resulting in higher production costs;

[0007] 3) Forging billet opening needs 5 fires, which increases the energy consumption and product manufacturing cost required for billet opening;

[0008] 4) The main performance indicators such as yield strength, plastic elongation, section shrinkage, and carbide unevenness are low

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