High-bending-resistance, high-strength and high-toughness die steel and manufacturing method thereof

A manufacturing method and die steel technology, applied in the field of cold stamping die materials, can solve the problems of unsatisfactory bending resistance and anti-fracture ability, and achieve the effects of low alloying element content, refined microstructure and reduced manufacturing cost

Inactive Publication Date: 2016-04-13
BAOSTEEL SPECIAL STEEL CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the chemical element design of traditional cold work steel, its chemical composition has appropriately reduced the Cr content, but it is still high. It is because tungsten element is added to improve the performance of the steel. The C content is still high, and the bending resistance and fracture resistance are not good. ideal

Method used

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  • High-bending-resistance, high-strength and high-toughness die steel and manufacturing method thereof
  • High-bending-resistance, high-strength and high-toughness die steel and manufacturing method thereof
  • High-bending-resistance, high-strength and high-toughness die steel and manufacturing method thereof

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Experimental program
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Embodiment 1

[0076] In this example, the composition and weight percentage of the cold work die steel are as follows:

[0077] C0.73%, Si0.79%, Mn0.83%, Cr2.30%, Mo0.55%,

[0078] V0.46%, Ni0.33%, P0.013%, S0.010%, Fe balance.

[0079] The ratio of the chemical composition of the high bending strength and toughness mold steel in this embodiment is melted in the induction furnace, and the steel ingot cast into it is placed in the electroslag remelting device as a consumable electrode, and the electroslag remelting is carried out, and the liquid metal The slag layer passing through the slag pool falls into the water-cooled crystallizer below, and then re-solidifies into steel ingots. When the above-mentioned solidified steel ingots enter the heating furnace of the radial forging machine, the temperature is controlled at 790°C, and the heating rate is controlled at 90°C / h. Heating to 1150°C and keeping it warm for 1.5 hours, then forging to become a high flexural toughness die steel. The ini...

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Abstract

The invention relates to high-bending-resistance, high-strength and high-toughness die steel and belongs to the technology of cold stamping die materials. The problem that existing die steel is poor in bending resistance and fracture preventing capacity is solved. The die steel comprises, by weight, 0.68%-0.78% of C, 0.75%-0.85% of Si, 0.8%-1.0% of Mn, less than 0.015% of P, less than 0.015% of S, 2.2%-2.5% of Cr, 0.40%-0.60% of Mo, 0.40%-0.50% of V, 0.30%-0.40% of Ni, and the balance Fe. Compared with the prior art, the die steel is advantageous in that the content of C, Cr, Mo, V, P and S is reduced, the content of Si is increased, the content of Ni is controlled, and thus the structure segregation condition of the steel is greatly relieved, and the bending resistance, fracture preventing capacity and other performance indexes of the high-strength and high-toughness cold work die steel are improved.

Description

technical field [0001] The invention relates to cold stamping die material technology, in particular to a high bending resistance tough die steel and a manufacturing method thereof. Background technique [0002] Cold punching dies are used for punching loads, impact forming, bending, cold heading and other processes of metal or non-metallic materials. The working objects are at room temperature, and the working conditions of the dies are quite harsh. The cold stamping die steel usually selected requires sufficient strength, toughness, bending resistance and wear resistance. For large-load cold extrusion and cold heading forging dies, materials are required to have higher bending and fracture resistance. [0003] At present, the most widely used cold work die steel material in the domestic and foreign mold material market is high-carbon high-chromium cold work die steel 1.2379 steel (component mass percentage: C: 1.5-1.6%, Si: 0.10-0.40%, Mn: 0.15~0.45%, Cr: 11.0~12.0%, Mo:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C22C33/04C22B9/18
Inventor 续维张恒
Owner BAOSTEEL SPECIAL STEEL CO LTD
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