Low-chromium low-cost hot working die steel

A technology of hot-working die steel and chemical composition, which is applied in the field of tool and die, can solve the problems of rising smelting costs, and achieve good anti-tempering stability and good economic benefits

Active Publication Date: 2010-06-02
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Low-chromium low-cost hot working die steel
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  • Low-chromium low-cost hot working die steel

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Embodiment Construction

[0019] According to the chemical composition range of the steel of the present invention mentioned above, 3 furnaces of the steel of the present invention and 1 furnace of comparison 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 steel of the present invention and the comparison steel are annealed, they are processed into samples, and subjected to quenching and tempering treatment (quenching at 1000°C, tempering at 510-650°C). The mechanical properties at room temperature are shown in Tables 2-5.

[0020] The steel of the present invention has comprehensive mechanical properties equivalent to the contrast steel, and has higher impact toughness than the contrast steel. After quenching, it is tempered at 510-650°C. The hardness, tensile strength, and tempering stability of the steel of the present invention are comparable to th...

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Abstract

The invention belongs to the field of tool and die, specifically to a low-chromium 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: 0.9-1.2%, Mo: 0.45-0.55%, Cr: 2.8-3.2%, V: 0.25-0.45%, Nb: 0.08-0.15% and Fe and unavoidable impurities: the balance. 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, low cost 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, and is mainly used for manufacturing hot extrusion abrasive tools and mandrels, forging dies of die forging hammers, forging press dies, die inserts for precision forging machines, die-casting dies of aluminum, copper and their alloys, etc. , especially relates to a low-chromium 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, the steel con...

Claims

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Application Information

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Patent Type & Authority Patents(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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