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High-niobium, high-wear-resistance and high-toughness cold-work die steel

A technology of cold working die steel and high wear resistance, which is applied in the field of die steel and can solve the problems of less addition, insignificant effect or deterioration of mechanical properties of steel, etc., to achieve increased utility, high secondary hardening effect, and improved material properties Effect

Inactive Publication Date: 2013-09-11
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The amount of niobium added is too small, and the effect is not achieved or the effect is not obvious
If the addition of niobium is too much, eutectic reaction will easily occur during the solidification process of molten steel, forming large-grained eutectic carbides, which will seriously deteriorate the mechanical properties of steel

Method used

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Embodiment Construction

[0025] According to the chemical composition range designed by the present invention, 3 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 into φ17mm rods. After the steel is annealed, it is processed into a sample, and after quenching and tempering treatment (quenching at 1000-1200°C, tempering at 200-600°C), the mechanical properties at room temperature are shown in Tables 2-6.

[0026] The steel of the invention has high hardness and good impact toughness.

[0027] 1. Invention steel 3# has lower total Nb+V than comparison steel 4#, which reduces costs, saves alloy elements and saves resources. (See Table 1)

[0028] 2. The invention steel has a higher quenching peak hardness than the comparison steel. (See Table 2)

[0029] 3. After quenching at the same temperature and tempering at different temperatures, the invention ste...

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Abstract

The invention discloses a kind of high-niobium, high-wear-resistance and high-toughness cold-work die steel, which belongs to the technical field of die steel. The die steel comprises the following chemical compositions in percentage by weight: 0.80-1.20% of C, 0.50-1.60% of Si, less than or equal to 0.030%, less than or equal to 0.030% of P, less than or equal to 0.40% of Mn, 0.80-1.20% of W, 1.50-2.20% of Mo, 7.80-8.20% of Cr, 0.50-1.90% of V, 1.10-2.00% of Nb, and the balance of Fe and unavoidable impurities. Compared with the prior art, the die steel disclosed by the invention has the advantages of high hardness, high wear resistance, high toughness and good comprehensive performance. The die steel disclosed by the invention is high in quenching peak hardness (65.5 HRC), high in secondary hardening hardness (63.8-64.5 HRC), and good in impact toughness (8-11J).

Description

technical field [0001] The invention belongs to the technical field of die steel, in particular to a high-niobium, high-wear-resistant, high-toughness cold-work 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] With the rapid development of industrial technology, in order to reduce product production costs, improve production efficiency and product quality, improve material utilization, save energy and reduce consumption, domestic and foreign manufacturing industries widely use mold processing technology to replace traditional cutting processes. The working conditions of the mold are harsh, and the requirements for the mold material - mold steel are very high. According to the classification of the use of the mold, the mold steel is divided into cold work mold steel, hot work mold steel and plastic mold steel. Cold work die steel is mainly used to manu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/34C22C38/26
Inventor 马党参迟宏宵
Owner CENT IRON & STEEL RES INST
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