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Cold and hot shearing edge steel for shearing thick plate

A cutting edge steel and blade steel technology, applied in the field of ferrous metallurgical alloy steel cutting tool materials, can solve the problems of low wear resistance, poor toughness, restricting the service life of the cutting edge, etc., and achieve long service life, high impact toughness, and not easy to collapse. blade effect

Active Publication Date: 2009-02-18
马鞍山市申力特重工机械股份有限公司
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Problems solved by technology

[0005] In short, the existing cold shear blade and hot shear blade steel generally have a contradiction between wear resistance and toughness. The shear blade material with high wear resistance has poor toughness; the material with better toughness has low wear resistance, especially For cold shear blade steel, the contradiction is particularly prominent when cutting medium and thick plates. The contradiction between wear resistance and toughness seriously restricts the improvement of the service life of the shear blade.

Method used

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  • Cold and hot shearing edge steel for shearing thick plate
  • Cold and hot shearing edge steel for shearing thick plate
  • Cold and hot shearing edge steel for shearing thick plate

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Embodiment Construction

[0031] Let’s take a kind of cold and hot shear dual-purpose cutting edge steel——HMB steel. According to the weight percentage wt% of the alloy element composition: C: 0.35~0.60, Si: 0.25~1.50, Mn: 0.25~1.50, Cr: 3.00~ 7.00, W: 1.00~3.50, Mo: 1.00~4.50, V: 0.50~3.00, Nb: 0.50~3.00, Re: 0.05~0.15, Cu: ≤0.050, P: ≤0.025, S: ≤0.025, the rest is Fe . Within the above composition range, the content of main alloying elements and carbon should match each other according to the following formula:

[0032] C 0.033 W + 0.063 Mo + 0.19 V + 0.11 Nb + 0.06 Cr = 0.7 ~ 1.1

[0033] According to the composition and matching relationship of the alloying elements, the total content coefficient...

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Abstract

The present invention discloses one kind of cold and hot shearing edge steel for shearing thick plate and its production process. The cold and hot shearing edge steel has properly matched alloy elements and carbon. Its production process includes the following steps: designing alloy, smelting and on-the-spot sample analysis and regulation, ladle refining at 1650-1670 deg.c, casting ingot, forging rod, electroslag remelting and forging into shear edge material. The cold and hot shearing edge steel has high hardness, high strength, high wear resistance, high impact toughness and high red hardness, and is suitable for making shear for shearing cold and hot thick plate.

Description

technical field [0001] The invention belongs to black metallurgical alloy steel cutting tool materials, in particular to the production of cutting edge steel suitable for both cold shearing and hot shearing of medium and thick plates. Background technique [0002] In steel rolling production, the shearing machine is a device used to cut steel plates (slabs) into specified sizes, and plays an important role in steel plate production. The oblique blade shearing machine is the most used in the world. Its main working principle is to install the upper and lower cutting blades on the upper and lower knife tables, and the relative movement of the upper and lower knife tables drives the upper and lower shearing blades under pressure. Cut the steel plate. The cutting edge bears high-load compressive stress, friction and impact force during work, and also bears certain high temperature. Generally, the cutting edge working at room temperature to 400°C is called cold cutting edge, an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/26C22C33/04C21C7/072B22D27/04B21J1/06C21D8/00
Inventor 曹金海郭有纪高甲生
Owner 马鞍山市申力特重工机械股份有限公司
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