High-obdurability shear blade die steel and heat treatment method

Abstract

The invention belongs to the field of metal materials and relates to high-obdurability shear blade die steel and a heat treatment method. The high-obdurability shear blade die steel is characterized by comprising the following components in percentage by weight: 0.45 to 0.6 percent of C, 0.6 to 1.2 percent of Si, less than or equal to 0.4 percent of Mn, 4 to 6 percent of Cr, 0.6 to 1.6 percent ofMo, 0.8 to 1.5 percent of W, 0.4 to 1.1 percent of V, less than or equal to 0.03 percent of S, less than or equal to 0.03 percent of P and the balance of iron. In the heat treatment process, the quenching temperature is between 1,030 and 1,050 DEG C, the hardness requirement is 53 to 56 and the tempering temperature is 580 DEG C for two times; and the hardness requirement is 56 to 59 and the tempering temperature is 560 DEG C for two times. The high-obdurability shear blade die steel and the heat treatment method have the advantages that: the quenched and tempered is Rockwell hardness (HRC) 52 to 58; the high-obdurability shear blade die steel is applied to cold and hot share blade of a steel rolling mill; the average service life of the steel is increased by more than one time compared with that of the steel H13, H12 and H11; the price is increased by only 15 percent compared with that of the steel H13, H12 and H11; and the cost performance is greatly improved.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a high-strength toughness shear blade die steel and a heat treatment method. Background technique [0002] Since the reform and opening up, my country's steel industry has developed by leaps and bounds. Especially since the 20th century, my country's steel production has been in the leading position in the world, and the amount of shearing blades used for rolling steel round steel, steel bars, and steel plates has increased significantly. At present, the die steel used for cutting blades has a short service life and cannot meet the market demand. According to the requirements of the shearing edge for the working conditions of the shearing steel material, the shearing edge should have high strength, high toughness, and high wear resistance. [0003] At present, domestic steel rolling mills generally use 4CrW2Si, 5CrW2Si, 6CrW2Si for cold shear blades, LD die steel is al...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of insufficient toughness of the existing mold steel, easy to jump the edge or sufficient toughness of the steel, but insufficient strength and wear resistance, and low cost performance, and provide a low cost, high strength and toughness, high wear resistance, and cost performance High strength and toughness shear blade die steel can meet the needs of the steel rolling industry for hot and cold shear blades, reduce production costs and save resources

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