Flying shear blade and preparation method thereof

Abstract

The present invention discloses a flying shear blade. The component has the weight percentage that C is 0.40-0.70, Si is 0.50-1.20, Mn is 0.20-0.50, Cr is 4.00-6.00, Mo is 0.50-2.00, V is 0.30-1.50, P is less than or equal to 0.02, S is less than or equal to 0.02, and Fe and inevitable impurity are the residual. The present invention provides a manufacture method of electric furnace smelting, and ingot casting; hydrogen removing and annealing treatment, and forging; preliminary heat treatment, rough machining, quenching and tempering heat treatment (primary quenching and high temperature tempering), semi finishing, ultimate heat treatment (secondary quenching, primary low temperature tempering, and secondary low temperature tempering), and fine finishing. By effectively controlling the material texture and the morphology, the quantity, the size and the distribution of carbonide, the quenching temperature and the tempering temperature of the quenching and tempering heat treatment, and the quenching temperature and the tempering temperature of the ultimate heat treatment are controlled, the texture crystal grains are more refined, the carbonide is distributed in a dispersed way, and simultaneously, the thermal stability and the retentivity are remarkably enhanced, thereby being advantageous for improving the operational performance of the blade.

Description

technical field [0001] The invention relates to the field of metallurgical tool materials, in particular to a flying shear blade suitable for cutting hot-rolled high-strength thick plates to length or multiple lengths and a manufacturing method thereof. Background technique [0002] With the rapid development of my country's railways, bridges, construction, petroleum, automobiles, and household appliances, the proportion of high-strength hot-rolled commercial materials continues to increase, including: pipeline steel, automobile girder plates, high-strength container plates, 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 high-strength plate incoming material, poor plate shape and cross-section quality, shearing production is difficult, and it is easy to cause chipping, uneven wear and rapid passivation of the shearing blade, resulting in frequent shutdowns to repla...

AI Technical Summary

Problems solved by technology

The blade material belongs to micro-alloyed tool steel, which is only suitable for ordinary mechanical blades