Semi-high speed steel copper soldering inlaid steel cutting blade and manufacturing method thereof

Abstract

The invention discloses a semi-high speed steel copper soldering inlaid steel cutting blade and a manufacturing method thereof, which belong to the field of mechanical blades. The cutting blade is manufactured by welding a semi-high speed shear steel on a cutter body through copper soldering, wherein the semi-high speed shear steel comprises the following chemical elements by weight percent: 0.56-0.65% of C, 0.40-0.60% of Si, 0.25-0.40% of Mn, 6.0-6.8% of Cr, 1.6-2.5% of W, 4.2-5.2% of Mo, 0.7-0.9% of V, 0.1-0.2% of Nb, 0.3-0.4% of one of Co or Ni, no more than 0.02% of S, no more than 0.025% of P and the balance of Fe. The method for preparing comprises: smelting the semi-high speed shear steel, carrying out forging rolling at 870 DEG C-1080 DEG C, and then annealing; secondarily, heating to 1160 DEG C-1180 DEG C, carrying out copper soldering to inlay steel, and quenching at the same time; and finally, tempering. The cutting blade has the same hardness as the original high speed steel copper soldering inlaid steel cutting blade, but has higher sharpness, and is easy for cutter sharpening, and the material cost and the technological cost are lowered.

Description

technical field [0001] The invention relates to the technical field of mechanical blades, more specifically, to a semi-high-speed steel copper-brazed paper-cutting blade and a preparation method thereof. Background technique [0002] The use performance of the paper cutting blade should not only have high sharpness and wear resistance, but also have good impact resistance and certain thermal hardness. [0003] In the past, paper cutting blades were mainly steel-inlaid paper cutting blades made of CrWMn steel and high-speed steel as blade steel. The steel-inlaid paper cutter with CrWMn steel as the blade steel has a hardness of HRC61~63, which is mainly used for cutting paper with low hardness; the steel-inlaid paper cutter with W18Cr4V or W6Mo5Cr4V2 high-speed steel as the blade steel has a hardness of HRC64~ 66, mainly used for cutting high-quality high-strength paper or cardboard and other paper cutters. At present, there are two methods for inserting the blade steel int...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiencies of low sharpness and poor sharpening performance of high-speed steel-inlaid paper-cutting blades in the prior art, and provide a semi-high-speed steel-copper-brazed steel-inlaid paper-cutting blade and a preparation method thereof. The paper cutting blade prepared by the designed blade steel material has a hardness of HRC64-66, and its sharpness and sharpening performance are significantly better than the steel-inlaid paper cutting blade made of high-speed steel as the blade steel, and the alloy amount cost of the blade steel is reduced

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