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Binary alloy coating seamless steel tube top and manufacture method thereof

A technology of seamless steel pipe and double alloy, which is applied in metal material coating process, coating, metal rolling, etc., can solve the problems of complex manufacturing method, high cost, and the service life of the plug needs to be further improved. Cracks, the effect of eliminating stress concentration

Inactive Publication Date: 2009-12-09
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of manufacturing the plug is extremely complex and costly
[0003] The above traditional conventional methods are still unsatisfactory, the service life of the plug needs to be further improved, and the cost should be further reduced

Method used

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  • Binary alloy coating seamless steel tube top and manufacture method thereof
  • Binary alloy coating seamless steel tube top and manufacture method thereof
  • Binary alloy coating seamless steel tube top and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Select 3Cr2W8 as the plug base material, and obtain the casting blank;

[0021] (2) Carry out conventional mechanical processing on the plug blank, reserve 1.0mm thickness on the outer surface of the plug for the laser cladding process, and use the plug thread 7 to realize clamping and fixing before laser cladding;

[0022] (3) Adopt laser broadband cladding process, lateral powder feeding, see the applicant's authorized patent ZL200520121771.2 for the nozzle, double-barrel powder feeding method, one of which is filled with nickel-based alloy powder, and the other is filled with iron-based alloy powder;

[0023] (4) First use nickel-based alloy powder to carry out laser cladding on the top of the nose, the cladding track is a circular line, and the overlap rate is 40%;

[0024] (5) Laser cladding is carried out on the side of the nose and the working part. The cladding powder material is nickel-based alloy powder, and then the laser is used to continuously complete ...

Embodiment 2

[0029] (1) choose 20CrNi4 as the plug base material, and obtain the casting blank;

[0030] (2) Carry out conventional mechanical processing on the plug blank, reserve 3.0mm thickness on the outer surface of the plug for the laser cladding process, and use the plug thread 7 to realize clamping and fixing before laser cladding;

[0031] (3) Adopt laser broadband cladding process, side powder feeding nozzle, double-barrel powder feeding method, one of which is filled with nickel-based alloy powder, and the other is filled with iron-based alloy powder;

[0032] (4) First use nickel-based alloy powder to carry out laser cladding on the top of the nose, the cladding track is a circular line, and the overlap rate is 60%;

[0033] (5) Laser cladding is carried out on the side of the nose and the working part. The cladding powder material is nickel-based alloy powder, and then the laser is used to continuously complete the laser cladding of the straightening part and parallel part wit...

Embodiment 3

[0038](1) Select 35CrMo as the base material of the plug, and obtain the casting blank;

[0039] (2) Carry out conventional mechanical processing on the plug blank, reserve 1.5mm thickness on the outer surface of the plug for the laser cladding process, and use the plug thread 7 to realize clamping and fixing before laser cladding;

[0040] (3) Laser broadband cladding process is adopted, powder is fed laterally, and powder is fed by double cylinders, one of which is filled with cobalt-based alloy powder and the other is filled with iron-based alloy powder;

[0041] (4) Cobalt-based alloy powder is first used for laser cladding on the top of the nose, the cladding track is a circular line, and the overlap rate is 50%;

[0042] (5) Laser cladding is carried out on the side of the nose and the working part. The cladding powder material is cobalt-based alloy powder, and then the laser is used to continuously complete the laser cladding of the straightening part and parallel part ...

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Abstract

A binary alloy coating seamless steel tube top and a manufacture method belong to the field of laser processing. Aiming at solving the easy peel-off of molybdenum alloy of a molybdenum alloy top, prolonging service life and reducing cost, the invention melts and coats nickel-base or cobalt-base alloy coating at the nose or working part of the top, melts and coats iron-base alloy coating at the straightening part and the parallel part to obtain a binary alloy coating seamless steel tube top; the preparation of the top has the following steps of manufacturing the top by adopting a casting manner, performing mechanical processing on the cast top and reserving melt thickness of 1.0-3.0mm on the external surface of the top for laser melt process; using nickel-base or cobalt-base alloy to perform laser melt on the top end of the nose part; performing laser melt on the lateral of the nose part as well as the working part with nickel-base or cobalt-base alloy as melt powder, finishing laser melt on the straightening part and the parallel part with iron-base alloy incessantly; performing strain-removal treatment, namely performing mechanical processing of top nose spiracle and finishing laser coating polishing and grinding.

Description

technical field [0001] The invention relates to a plug of a seamless steel pipe piercing machine and a laser cladding surface coating technology, and belongs to the technical field of laser processing. Background technique [0002] The pipe piercing machine plug is one of the parts that are consumed in large quantities in the production of seamless steel pipes by hot rolling, and its service life is directly related to the production efficiency and economic benefits of steel pipe enterprises. In the production process of seamless steel pipes, the plug needs to advance in a spiral manner and must bear great axial and radial stress. Due to the joint action of high temperature and friction, the plug is easily damaged, and the inner surface of the tube blank is damaged, resulting in a Tube surface quality is poor. The failure mode of the plug is mainly due to the collapse of the nose and the fatigue cracking of the working part near the bottom of the nose, that is, the collapse...

Claims

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Application Information

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IPC IPC(8): B21B25/00C22C19/05C22C19/07C22C38/54B23P15/00C23C24/10C21D9/00C21D11/00
Inventor 杨胶溪左铁钏刘华东丁啸雷丽
Owner BEIJING UNIV OF TECH
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