Molybdenum-free low-cost hot working die steel

Abstract

The invention belongs to the field of tool and die, specifically to a molybdenum-free low-cost hot die steel. The chemical compositions of the steel (weigh%) are: C: 0.38-0.42%, Si: 0.9-1.1%, S<=0.030%, P<=0.030%, Mn: 0.3-0.5%, W: 1.9-2.2%, Cr: 4.8-5.2%, V: 0.25-0.45%, Nb: 0.08-0.15% and Fe and unavoidable impurities: the residue. The steel of the invention can be used as a substitute for high-alloy-containing H13, has similar comprehensive performance to H13, superior temper resistance, no molybdenum and low chromium; the rational alloy ratio saves cost more than 20%, compared with H13 steel, thus having better economical benefit.

Description

technical field [0001] The invention belongs to the field of tools and molds. It is mainly used in the manufacture of hot extrusion abrasive tools and core rods, forging dies for die forging hammers, forging press dies, die inserts for precision forging machines, and die-casting dies for aluminum, copper and their alloys. It particularly relates to a molybdenum-free low-cost hot work die steel. Background technique [0002] With the development of machinery manufacturing industry, higher requirements are put forward for the performance and economic cost of hot work die steel. H13 steel is the most widely used and most representative hot work die steel. V is the main strengthening element, which has good strength and toughness, while maintaining high thermal fatigue resistance, so it can withstand high temperature tension, compression and impact, and can also withstand high temperature wear, oxidation and periodic temperature changes of shock and heat And so on. However, t...

AI Technical Summary

Problems solved by technology

However, steel contains relatively high content of molybdenum and vanadium and other precious elements. In recent years, the price of molybdenum and vanadium alloys has risen sharply, resulting in a sharp increase in the smelting cost of H13 steel.

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