Laser cladding wear-resisting and heat fatigue-resisting alloy coating process for manufacturing hot rolled seamless steel tube rolling mill retained mandrel

A technology of restraint mandrel and laser cladding, which is applied in the field of anti-thermal fatigue alloy coating and preparation of hot-rolled seamless steel pipe mill restraint mandrel wear-resistant field, which can solve the problems of not seeing and not being able to adapt, and achieve the finished product High efficiency, small machining allowance and low energy consumption

Inactive Publication Date: 2011-03-30
SHENYANG DALU LASER COMPLETE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for other specific equipment components, such as special structures such as the stop mandrel of the hot-rolled seamless steel pipe mill, the existing laser cladding process is obviously unable to adapt
[0015] According to the applicant's search and verificatio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0044] Laser cladding manufacturing process of stop mandrel of hot-rolled seamless steel pipe mill:

[0045] 1. Working layer machining and surface cleaning

[0046] The purpose of mechanical processing is to reserve the thickness of the working layer required for laser cladding. Surface cleaning is an important process to ensure the bonding strength between the coating and the substrate. The oil stains on the limiting mandrel are removed with solvents or cleaning agents. The rust layer can be removed by grinding or sandblasting.

[0047] 2. Laser cladding processing

[0048] 1) Selection of alloy powder and adjustment of automatic powder feeding device

[0049] According to the working condition of the restraining mandrel, cobalt-based alloy powder is selected. The chemical composition of cobalt-based alloy powder is: C: 0.2-0.3%, Cr: 25-30%, Ni: 2-4%, Mo: 4.5 -6.5%, Si: 0.7-1.5%, the balance is Co.

[0050] Adjust the powder feeding rate of the automatic powder feeding d...

Embodiment 2

[0060] The manufacturing process of the laser cladding of the stop mandrel of the hot-rolled seamless steel pipe rolling mill of the present invention:

[0061] 1. Working layer machining and surface cleaning

[0062] The purpose of mechanical processing is to reserve the thickness of the working layer required for laser cladding. Surface cleaning is an important process to ensure the bonding strength between the coating and the substrate. The oil stains on the limiting mandrel are removed with solvents or cleaning agents. The rust layer of the rod can be removed by grinding or sandblasting.

[0063] 2. Laser cladding processing

[0064] 1) Selection of alloy powder and adjustment of automatic powder feeding device

[0065] According to the working condition of the restraining mandrel, cobalt-based alloy powder is selected. The chemical composition of cobalt-based alloy powder is: C: 0.2-0.3%, Cr: 25-30%, Ni: 2-4%, Mo: 4.5 -6.5%, Si: 0.7-1.5%, the balance is Co.

[0066] A...

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PUM

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Abstract

The invention discloses a laser cladding wear-resisting and heat fatigue-resisting alloy coating method for manufacturing a hot rolled seamless steel tube rolling mill retained mandrel, which is characterized by comprising the following steps: carrying out surface cleaning on greasy dirt and rustyscale of a retained mandrel; selecting cobalt-base alloy powder; adopting laser equipment and an automatic powder delivering device; carrying out laser cladding processing on the surface of the retained mandrel so as to form a 0.2-2mm coating with high-temperature oxidation resistance, heat fatigue resistance and heat abrasion resistance; and carrying out high temperature tempering processing on the retained mandrel after being subject to the laser cladding processing so as to decrease the coating after being subject to the laser cladding processing and the residual stress after the gene matrix is transformed. The laser cladding alloy coating of the invention is even and compact, has the characteristics of high production efficiency, low energy consumption, small machining allowance of a cladding layer, high yield and low comprehensive cost and the like.

Description

technical field [0001] The invention relates to a wear-resistant and anti-corrosion method for metallurgical equipment components, in particular to a process for preparing a wear-resistant and thermal fatigue-resistant alloy coating of a hot-rolled seamless steel pipe rolling mill stop mandrel using laser cladding technology. C23C24 / 10(2006.01) I technical field in the IPC International Patent Classification. Background technique [0002] my country's seamless steel pipe industry has experienced the fastest development in history in recent years. As an important tool and mold in the pipe rolling mill-mandrel, its demand has also increased significantly. Experts in the industry believe that during the "Eleventh Five-Year Plan" period, with the continuous production of domestic construction and new production lines, it is estimated that the domestic consumption of mandrels in my country will be around 15,000 to 20,000 tons in 2010. [0003] Among the production costs of seaml...

Claims

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Application Information

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IPC IPC(8): C23C24/10
Inventor 陶兴启陈海涛
Owner SHENYANG DALU LASER COMPLETE EQUIP
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