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Laser strengthening process of perforated plug

A perforated plug and laser strengthening technology, which is applied in the coating process and coating of metal materials, can solve the problems of cumbersome procedures, reduced hardness of cladding layer, and slow production efficiency, so as to reduce pollution and improve hardness and wear resistance , long service life effect

Active Publication Date: 2015-09-23
PIZHOU RUNHONG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The laser cladding process of the perforated plug in the prior art must preheat the plug and anneal after the surfacing to eliminate stress. Not only the process is cumbersome, the production efficiency is slow, but also the hardness of the cladding layer is reduced. there are certain problems

Method used

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Embodiment Construction

[0015] The specific steps of the laser strengthening process of the perforated plug in this embodiment are as follows:

[0016] A. Pre-treat the surface of the pierced plug.

[0017] Remove dust, oil, rust, etc. on the perforated plug; detect the size of each part; and clean.

[0018] B. Laser cladding the surface of the perforated plug.

[0019] Using the segmented laser cladding method, starting from the tip of the nose of the perforated plug, from front to back (the tip of the nose of the plug is the front end, and the part with the largest outer diameter of the plug is the rear end) to carry out laser cladding on the surface of the perforated plug segment by segment. First, a layer of transition alloy is clad on the surface of the perforated plug substrate, and then a layer of high-strength alloy is clad on the transition alloy layer. During the laser cladding process, the perforated plug is continuously tapped with a copper rod, so that the perforated plug vibrates to r...

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Abstract

The invention relates to a laser strengthening process of a piercing point. The laser strengthening process comprises the following steps of: smelting a transition alloy layer on the surface of a substrate of the piercing point; smelting a high-strength alloy layer on the transition alloy layer by laser, wherein alloy powder used by the transition alloy layer is an nickel-based alloy; and the alloy powder used by the high-strength alloy layer is a cobalt-based alloy. In the process, the hardness of the transition alloy layer is lower than that of the high-strength alloy layer, has the transition effect on the high-hardness and high-abrasion-resistance high-strength alloy layer, and can better remit an overlaying stress, so that a residual overlaying stress does not cause great influences on tissues of a laser smelting layer even if the point is not pre-heated and not annealed, so that the phenomenon that the performance of the smelting layer is influenced by annealing can be effectively avoided and the surface hardness and the abrasion resistance of the piercing point are greatly improved; and meanwhile, the pre-heating and annealing processes are saved and the production efficiency is improved.

Description

[0001] This application is a divisional application, the application number of the original application: 201210248964.9, the name of the invention: laser strengthening process for perforated plugs, and the application date: 2012-07-18. technical field [0002] The invention relates to a laser cladding method, in particular to a laser cladding method for the surface of a perforated plug. Background technique [0003] With the increase of my country's export of seamless steel pipes, the consumption of spare parts used in the production of seamless steel pipes is also increasing year by year. The perforated plug is a key tool for producing seamless steel pipes. The quality and service life of the perforated plug have a direct impact on the output, quality and production cost of seamless steel pipes. The temperature of the perforated plug is very high when it is working, and it bears a lot of combined stress. During use, it will fail such as deformation, collapse, sticking to st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C19/05C22C19/07
Inventor 刘勇
Owner PIZHOU RUNHONG IND CO LTD
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