Fixed-length shear blade and manufacturing method thereof

Abstract

The invention discloses a fixed-length shear blade and a manufacturing method of the fixed-length shear blade. The fixed-length shear blade comprises the following components by weight percent: 0.75-1.00% of C, 0.60-1.40% of Si, 0.20-0.50% of Mn, 6.50-8.00% of Cr, 2.50-4.00% of Mo, 1.80-3.50% of V, less than or equal to 0.020% of S, less than or equal to 0.020% of P, the balance of Fe and the unavoidable impurities; and the manufacturing method of the fixed-length shear blade comprises the technological process of: smelting by an induction furnace, electrode bar pouring, electroslag remelting, ingot casting, forging, preheating treatment, rough machining, hardening and tempering heat treatment, semi-finishing, final heat treatment and finish machining. The fixed-length shear blade is high in strength and wear resistance, thus guaranteeing the shock resistance of the blade.

Description

technical field [0001] The invention relates to a metallurgical machinery blade, in particular to a chipping-resistant and wear-resistant cut-to-length scissors blade and a manufacturing method thereof. Background technique [0002] With the rapid development of my country's national defense, aerospace, nuclear power and other industries, the demand for special steel strip products such as titanium and titanium alloys, superalloys, corrosion-resistant alloys, precision alloys, and special stainless steels continues to increase. Production technology has become a key development field at home and abroad. [0003] Due to the variety of special steel strip products, high product strength level, high hardness, the highest yield strength reaches 1200MPa, and the unit shear force of the product is cut to length and segmented is large, which puts forward a lot on the wear resistance and impact resistance of the blade. high demands. [0004] Chinese patent CN101144140A discloses a ...

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Problems solved by technology

The content of C element and Cr, Mo, V and other alloying elements that are easy to form carbides in the above two blade materials are relatively low, so the total amount of composite carbides in the structure does not exceed 10%, and the wear resistance is average. When it is used, the cutting edge is prone to rapid wear, chipping, edge collapse, etc., and the service life of the blade is very short, which seriously affects the product cutting quality, production cost and production efficiency.

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