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

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...

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 verification: there is no domestic precedent for the use of laser cladding technology to complete the wear-resistant and thermal fatigue-resistant alloy coating of the stop mandrel of the hot-rolled seamless steel pipe rolling mill, and no relevant reports have been seen abroad.