Laser strengthening process for tapered surface of pick body

Abstract

The invention discloses a laser strengthening process for a tapered surface of a pick body, which is characterized by comprising the following steps: 1) surface treatment on the tapered surface of the pick body: carrying out oil and rust removal on the surface of the pick at room temperature, then cleaning the surface by alcohol; 2) presetting of a composite ceramic material: uniformly coating the composite ceramic material on the tapered surface of the pick body, wherein the composite ceramic material comprises the following elements in percentage by weight: 50 to 96 percent of Fe, 1 to 7 percent of Mg, 3 to 30 percent of B and 0 to 13 percent of M which is one or more of Si, Cu, Ni, W, Cr, La, Mn, Ce, Zn, V and Zr; and 3) laser strengthening processing on the tapered surface of the pickbody: re-melting the composite ceramic material with the tapered surface of the pick body by a laser device, wherein the laser power is 5000 W, the scanning speed is 300mm / min, the lapping rate is 35percent, and the spot diameter is 1.8 mm. In the invention, the production process of high-performance coatings is innovated by combining the good robustness of metals with the high hardness, high chemical stability and high abrasive resistance of coating materials, and the Rockwell hardness of the pick subjected to treatment is over HRC70.

Description

technical field [0001] The invention belongs to the technical field of laser alloy surface strengthening, in particular to a laser strengthening process for the conical surface of a pick tooth body used on a coal mining unit. Background technique [0002] The pick is a key part for directly cutting coal and rock on the mining unit. The pick pick is a conical body with a hard alloy head inlaid at the tip of the cone. The premature wear of the pick parent body greatly shortens the life of the pick. Therefore, improving the wear resistance of the pick end is the key to prolonging the service life. Picks often produce a lot of sparks when cutting coal and rocks. These sparks are very easy to detonate the gas or coal dust in the coal mine, and major coal mine safety accidents occur. In order to prevent these sparks from igniting the gas or coal dust, coal shearers or Roadheaders are equipped with water spray systems, but in actual production, the water spray nozzles are easily ...

AI Technical Summary

Problems solved by technology

Picks often produce a lot of sparks when cutting coal and rocks. These sparks are very easy to detonate the gas or coal dust in the coal mine, and major coal mine safety accidents occur. In order to prevent these sparks from igniting the gas or coal dust, coal shearers or Roadheaders are equipped with water spray systems, but in actual production, the water spray nozzles are easily blocked and lose their effect, which greatly affects the safety of coal mine production