A laser repair material for repairing titanium alloy valve core and valve seat

Abstract

The invention belongs to the field of laser repairing materials, particularly relates to a laser repairing material which is resistant to high temperature, corrosion and pressure and excellent in cladding performance, and specifically relates to a laser repairing material for a valve element and a valve seat in the PTA production process of the chemical industry. The laser repairing material comprises, by weight percent, 8-10% of Al, 2.5-3% of Sn, 4.5-5% of Mo, 12-13.5% of V, 12-12.5% of Cr, 0.5-1% of Mn, 2.5-4% of Ni, 2.5-3% of Cu, 0.15-0.3% of Si, 0.01-0.05% of B, less than 0.2% of Fe, lessthan 0.1% of C, less than 0.05% of H, less than 0.04% of N and less than 0.05% of O; and in addition to the components, at least three of rare earth elements, namely La, Yb, Sc2O3 and Pr2O3 are addedto the laser repairing material, wherein La accounts for 0.1-0.3%, Yb accounts for 0.1-0.3%, Sc2O3 accounts for 0.1-0.3%, Pr2O3 accounts for 0.1-0.3%, and the balance is Ti. The laser repairing material achieves repair of the valve element and the valve seat, the repairing process is easy to operate, high in adaptability, small in thermal deformation and high in normalization, the repaired valve element and the repaired valve seat meet the use requirement, and the laser repairing material has great value in reduction of the maintenance cost of the valve element and the valve seat.

Description

technical field [0001] The invention belongs to the field of laser repair materials, in particular to a laser repair material with high temperature resistance, corrosion resistance, pressure resistance, and superior cladding performance, and in particular to a laser repair of valve cores and valve seats in the PTA production process of the chemical industry Material. Background technique [0002] In the chemical industry, PTA is a product used in large quantities. The downstream polyester fiber, commonly known as polyester, is widely used in production and life in my country. my country's chemical fiber output ranks first in the world. However, the production process of the valve core and valve seat device in the production of PTA is complicated, the production cost is high, and the cycle is long. The valve core is a cylindrical rod structure, and the middle of the valve seat is a hollow structure. Both are made of titanium alloy. The valve core and valve stem have been wor...

AI Technical Summary

Problems solved by technology

[0004] At present, titanium alloy is usually used in the manufacture of foreign valve cores and valve seats, and the cost of finished products is relatively high. In addition, the material of titanium alloy products is relatively special, and it still maintains its strength and creep resistance at a temperature of 500 ° C to 600 ° C. Performance, high strength, good corrosion resistance, high heat resistance, ordinary welding methods can not fuse titanium alloy base material, there is no relevant repair method and experience, it is impossible to repair it at home and abroad, use suitable repair materials to combine Laser cladding technology laser repair valve core and valve seat, there is no precedent in China, and there are no related reports abroad