Molybdenum-free low-cost hot working die steel

A hot work die steel, low-cost technology, applied in the field of tooling and die, can solve the problems of rising smelting cost, and achieve the effects of good tempering resistance stability, low cost and good economic benefits

Inactive Publication Date: 2008-08-13
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Molybdenum-free low-cost hot working die steel

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Embodiment Construction

[0018] According to the chemical composition range designed above, 3 furnaces of the steel of the present invention and 1 furnace of comparative steel (H13) were smelted on a 25kg vacuum induction furnace, and their specific chemical compositions are shown in Table 1. Molten steel is cast into ingots and forged into φ16mm, □15mm rods. After the example steel and the comparison steel were annealed, they were processed into samples, which were quenched and tempered (quenched at 1050°C and tempered at 510-650°C). The mechanical properties at room temperature are shown in Tables 2-7.

[0019] The steel of the invention has comprehensive mechanical properties equivalent to those of the contrast steel, and has higher impact toughness than the contrast steel. After quenching and tempering at 510-650°C, the hardness, strength and tempering resistance stability of the steel of the present invention are equivalent to those of the comparison steel.

[0020] 1. After quenching (the quenc...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/26
Inventor 马党参陈再枝刘建华张晨周健
Owner CENT IRON & STEEL RES INST
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