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Semi-high-speed steel

A semi-high-speed steel, weight percentage technology, applied in the field of semi-high-speed steel, can solve the problems of poor sharpening and low sharpness, achieve low cost, improve smoothness, reduce material costs and process costs

Inactive Publication Date: 2016-06-08
CHONGQING GUIKUN MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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 blade steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] A semi-high-speed steel composed of the following chemical elements in weight percentage: C: 0.56-0.65%, Si: 0.40-0.60%, Mn: 0.25-0.40%, Cr: 6.0-6.8%, W: 1.6-2.5% %, Mo: 4.2-5.2%, V: 0.7-0.9%, Nb: 0.1-0.2%, Co0.3-0.4%, S≤0.02%, P≤0.025%, and the rest is Fe.

[0021] Further, it is composed of the following chemical elements in weight percentage: C: 0.58-0.62%, Si: 0.48-0.52%, Mn: 0.28-0.38%, Cr: 6.12-6.60%, W: 1.82-2.28%, Mo: 4.45~4.94%, V: 0.76~0.81%, Nb: 0.13~0.16%, Co or Ni: 0.32~0.38%, S≤0.02%, P≤0.025%, and the rest is Fe.

[0022] The preparation steps of a semi-high-speed steel copper brazing inlaid steel paper cutting blade are as follows:

[0023] (1) Production of semi-high-speed steel blade steel: use induction furnace or induction furnace to produce semi-high-speed steel blade steel through electroslag remelting. The semi-high-speed steel blade steel is composed of the following chemical elements in weight percentage: C: 0.56 ~0.65%, Si: 0.40~0.60%, Mn: 0....

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Abstract

The invention discloses a semi-high-speed steel. The semi-high-speed steel is prepared from the following chemical elements in percentage by weight: 0.58-0.62% of C, 0.48-0.52% of Si, 0.28-0.38% of Mn, 6.12-6.60% of Cr, 1.82-2.28% of W, 4.45-4.94% of Mo, 0.76-0.81% of V, 0.13-0.16% of Nb, 0.32-0.38% of Co or Ni, S which is less than or equal to 0.02%, P which is less than or equal to 0.025%, and the balance being Fe. According to the semi-high-speed steel disclosed by the invention, the hardness of a paper cutting blade made from the semi-high-speed steel is the same as that of an original copper-brazed steel-inlaid paper cutting blade made from high-speed steel, but the sharp degree of the paper cutting blade made from the semi-high-speed steel is higher, the paper cutting blade made from the semi-high-speed steel is easy to sharpen, and the material cost and the technology cost are reduced.

Description

technical field [0001] The invention relates to the technical field of mechanical blades, more specifically, to a semi-high-speed steel. 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] It is very important to maintain the sharpness and sharpness of the cutting edge when the paper cutting blade is cutting. The carbides in the mouth are easy to fall off, which will not only reduce the sharpness, but also easily cause chipping during shearing. In recent years, we have researched, investigated, analyzed and demonstrated that if a suitable semi-high-speed steel blade steel is used, the number of carbides in the blade steel is reduced to between 3% and 8%, and the hardness of the matrix is ​​quenched and tempered while maintaining the level of high-speed steel, it will It is beneficial to improve the sharpness, durabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/30C22C38/48
Inventor 钟传梅
Owner CHONGQING GUIKUN MACHINERY CO LTD
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