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Rotary excavating tooth body surface strengthening laser dispersion alloying method

A surface strengthening and alloying technology, applied in the coating process and coating of metal materials, can solve the problems of thermal stress accumulation, reduced substrate toughness, easy peeling of the cladding layer, etc., and achieves simple operation, high hardness and resistance. abrasive effect

Inactive Publication Date: 2017-12-08
JIANGSU ZHONGKE DAGANG LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the large amount of heat input brought by the cladding process leads to the accumulation of thermal stress inside the substrate, and the toughness of the substrate is reduced. Therefore, the rotary digging teeth are prone to brittle fracture during the operation process, and the cladding layer is also easy to peel off.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A laser dispersion alloying method for strengthening the surface of a rotary digging tooth body, comprising the following steps:

[0025] (1) At room temperature, the surface of the tooth body of the rotary digging tooth is degreased and derusted. The degreasing treatment is alcohol cleaning + ultrasonic cleaning, and the derusting treatment is flame cleaning.

[0026] (2) Install the rotary digging tooth after the surface treatment in step (1) in the chuck of the laser processing machine tool, and put the WC reinforcement phase powder into the powder feeding device, and the WC powder particle size is between 50 and 100 μm;

[0027] (3) Take the height direction of the rotary digging tooth body as the feeding direction of the laser head of the laser, the laser head emits pulsed laser, the powder feeding device feeds powder synchronously, and the power density of the pulsed laser is 10 5 W / mm 2 , the laser output wavelength is 5000nm; the scanning speed is 5mm / s, the po...

Embodiment 2

[0029] A laser dispersion alloying method for strengthening the surface of a rotary digging tooth body, comprising the following steps:

[0030] (1) At room temperature, the surface of the tooth body of the rotary digging tooth is degreased and derusted. The degreasing treatment is alcohol cleaning + ultrasonic cleaning, and the derusting treatment is flame cleaning.

[0031] (2) Install the rotary digging tooth after the surface treatment in step (1) in the chuck of the laser processing machine tool, and put the WC reinforcement phase powder into the powder feeding device, and the WC powder particle size is between 50 and 100 μm;

[0032] (3) Taking the height direction of the rotary digging tooth body as the feeding direction of the laser head of the laser, the laser head emits continuous laser light, and the powder feeding device feeds powder synchronously. The continuous laser power is 2500W, the scanning speed is 3mm / s, and the powder feeding speed is 25g / min, the protec...

Embodiment 3

[0034] A laser dispersion alloying method for strengthening the surface of a rotary digging tooth body, comprising the following steps:

[0035] (1) At room temperature, the surface of the tooth body of the rotary digging tooth is degreased and derusted. The degreasing treatment is alcohol cleaning + ultrasonic cleaning, and the derusting treatment is flame cleaning.

[0036] (2) Install the rotary digging tooth after the surface treatment in step (1) in the chuck of the laser processing machine tool, and put the WC reinforcement phase powder into the powder feeding device, and the WC powder particle size is between 50 and 100 μm;

[0037] (3) Taking the height direction of the rotary digging tooth body as the feeding direction of the laser head of the laser, the laser head emits continuous laser light, and the powder feeding device feeds powder synchronously. The continuous laser power is 2500W, the scanning speed is 3mm / s, and the powder feeding speed is 25g / min, the protec...

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Abstract

The invention discloses a rotary excavating tooth body surface strengthening laser dispersion alloying method. The method comprises the following steps that (1) a rotary excavating tooth obtained after surface treatment is clamped in a chuck of a laser machining machine tool, and wild phase powder is contained in a powder feed device; and (2) the height direction of a rotary excavating tooth body is used as the feed direction of a laser head of a laser device, the laser head emits lasers, the powder feed device synchronously feeds powder, the feed speed of the laser head cooperates with the speed of rotation of the rotary excavating tooth driven by the chuck, a micro melting pool is formed on the surface of the rotary excavating tooth body according to a preset motion track, the micro melting pool coats wild phase particles in the subsequent fast cooling and solidifying process, and an alloy strengthening micro area is formed. According to the method, the toughness of a rotary excavating tooth base material can be kept, and meanwhile the surface wear resistance of the tooth body can be improved.

Description

technical field [0001] The invention belongs to the technical field of surface strengthening of materials, in particular to a laser dispersion alloying method for surface strengthening of a tooth body of a rotary digging tooth. Background technique [0002] The rotary drilling tooth is the key working part of the drill bit of the rotary drilling rig. Its root is connected with the drill bit, and the tapered surface and the hard alloy head are used as the rotary drilling working surface. Due to the strong interaction between the rotary digging teeth and the excavated objects during the operation. This makes the tapered surface of the rotary digging tooth easy to wear and eventually fail. [0003] At present, the common method to improve the wear resistance of the conical surface of the rotary digging tooth is to clad the wear-resistant layer on the surface of the conical surface to improve its wear resistance. However, the disadvantage of this method is that the large amoun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 赵树森赵钊陈峰段韧徐陈
Owner JIANGSU ZHONGKE DAGANG LASER TECH
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