Disk shearing blade and method for manufacturing the same

Abstract

A disc scissors blade and its manufacturing method, the composition weight percentage of the material of the disc scissors blade is: C: 0.40-0.70%, Si: 0.50-1.2%, Mn: 0.20-0.50%, Ni: 1.00-1.50% %, Cr: 4.00-6.00%, Mo: 0.50-2.00%, V: 0.30-1.50%, Nb: 0.10-0.80%, P≤0.02%, S≤0.02%. The method introduces an electroslag remelting process into a common manufacturing method of disc shears, and increases the temperature of quenching and tempering heat treatment and final heat treatment. The disc scissors have good wear resistance and deformation resistance, and are suitable for slitting or trimming hot-rolled high-strength thick steel plates. In addition, the disc shear blade of the present invention also has a good use effect on disc shears in other similar working conditions, and can also be applied to disc shears for stripping or edge trimming of cold-rolled strip steel, and also has a promotional effect on non-ferrous metal disc shears. value and application prospects.

Description

technical field [0001] The present invention relates to a metallurgical machinery blade and its manufacturing method. Specifically, the present invention relates to a disc scissors blade and its manufacturing method. The disc scissors blade of the present invention is suitable for slitting hot-rolled high-strength thick steel plates. or trimming. Background technique [0002] With the rapid development of my country's railway, bridge, construction, petroleum, automobile, and home appliance industries, the proportion of high-strength hot-rolled commercial steel products continues to increase. These steel products include: pipeline steel, automobile girder plates, high-strength container plates, and high-strength engineering machinery. Steel, tool steel, knife die saw blade steel and other series of varieties. [0003] Due to the high internal stress of the incoming high-strength steel plate, the poor shape and section quality, the shearing production is difficult, and it is e...

AI Technical Summary

Problems solved by technology

[0013] Disc scissors blades are less hard and wear-resistant due to the absence of other strong carbide forming elements; or

[0014] In order to improve the hardness of the blade and meet the requirements of blade use, the quenching temperature and tempering temperature during quenching and tempering heat treatment, and the quenching temperature and tempering temperature during final heat treatment have to be reduced in the production process, resulting in the thermal deterioration of its structure and hardness. Poor stability and retention, only applicable to the operating conditions of cold disc shears; or

[0015] Due to the lack of wear-resistant alloy carbide phase, the wear resistance and scratch resistance of the material are poor, so when the disc scissors are used to cut high-strength thick steel plates, they are prone to edge flanging, chipping, and failure. Uniform wear and fluting, rapid passivation phenomena, resulting in frequent downtime for blade replacement; or,

[0016] The diameter of the disc scissors is small, about 300mm, generally only used for cutting ordinary thin steel plates, not suitable for cutting high-strength thick steel plates, etc.