High-toughness and high-wear-resistant cold-work die steel

A technology of cold working die steel and high wear resistance, applied in the field of die steel, can solve the problems of large size, loss of toughness, serious segregation, etc., and achieve the effect of excellent comprehensive performance, high bending strength and high impact toughness

Active Publication Date: 2014-07-23
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high content of C and Cr, the M 7 C 3 Eutectic carbides are...

Method used

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Embodiment Construction

[0023] According to the chemical composition range designed by the present invention, 4 heats of the steel of the present invention were smelted on a 25kg vacuum induction furnace, and its specific chemical composition is as shown in Table 1. Molten steel is cast into ingots and forged to make 20mm bar. After the steel is annealed, it is processed into a sample, which is quenched and tempered (quenched at 1000-1150°C, tempered at 200-600°C). The mechanical properties at room temperature are shown in Tables 2-6.

[0024] The steel of the invention has better toughness under the premise of maintaining high hardness.

[0025] 1. Invention steel 1#, 2# and 3# have lower cost than the comparison steel. (See Table 1)

[0026] 2. Invention steel 4# has higher quenching hardness, tempering hardness and secondary hardening effect than the comparison steel. (See Table 2, 3, 4)

[0027] 3. After quenching at the same temperature and tempering at different temperatures, the inventio...

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Abstract

The invention discloses a high-toughness and high-wear-resistant cold-work die steel, belonging to the field of tool and die steels. The steel comprises the following chemical components in percentage by weight: 0.8-1.5% of C, 0.5-1.5% of Si, less than or equal to 0.030% of S, less than or equal to 0.030% of P, less than or equal to 1.5% of Mn, 0.8-2.5% of Mo, 8.0-11.0% of Cr, 0.1-1.0% of V, less than or equal to 1.0% of N, and the balance of Fe and inevitable impurities. Compared with the prior art, the high-toughness and high-wear-resistant cold-work die steel disclosed by the invention keeps high wear resistance, and has higher toughness and bending strength and good comprehensive performances at the same time. Compared with a Cr12 type cold-work die steel, the high-toughness and high-wear-resistant cold-work die steel reduces the Cr content, and ensures that a material has higher toughness. Compared with a Cr8 type cold-work die steel, the high-toughness and high-wear-resistant cold-work die steel increases the Cr content, increases the wear resistance, and reasonably controls the C/Cr ratio, thus achieving the purposes of obtaining a better carbide distribution state than the Cr8 type cold-work die steel, and ensuring that the material has better toughness. The content of elements Mn and Si is increased so as to improve the hardness and enhance the wear resistance. By adopting relatively high Nb<+>V composite alloying, the effects of V in the steel are increased, and the secondary hardening effect is improved.

Description

technical field [0001] The invention belongs to the technical field of die steel, and in particular relates to a high-toughness, high-wear-resistant cold-working die steel. It is suitable for blanking, stamping, cold heading, stretching, embossing die steel, and can also be used for tool and roll steel. Background technique [0002] Cold work die steel is mainly used to manufacture various dies for pressing and forming metal materials at room temperature, including blanking dies, drawing dies, bending and flanging dies, embossing dies, cold extrusion dies, cold heading dies, Rolling dies and powder pressing dies, etc. Since the processed object is a metal material and processed at room temperature, it has great difficulty in deformation. Cold work die steel is subjected to considerable compressive stress and friction during work, and must have relatively high hardness and wear resistance. In order to avoid fracture and chipping caused by impact loads, it should also have a...

Claims

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Application Information

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IPC IPC(8): C22C38/26C22C38/24
Inventor 迟宏宵马党参
Owner CENT IRON & STEEL RES INST
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