摘要
It can directly influence the service life of the thickened oil pump through improving the wear resistance on the internal surface of the cast iron shell.The resistance to abrasion of gray cast iron HT200 is increased through hardening the surface of cast iron which is obtained as remelting it with tungsten inert shielded gas arc.The effect of arc current and melting rate on the microstructure and wear resistance is studied.The results are compared with those of WC electrode hardfacing for cast iron with chilled treating and proves that the remelting hardening principle is a much better and cheaper technique than the others.
It can directly influence the service life of the thickened oil pump through improving the wear resistance on the internal surface of the cast iron shell.The resistance to abrasion of gray cast iron HT200 is increased through hardening the surface of cast iron which is obtained as remelting it with tungsten inert shielded gas arc.The effect of arc current and melting rate on the microstructure and wear resistance is studied.The results are compared with those of WC electrode hardfacing for cast iron with chilled treating and proves that the remelting hardening principle is a much better and cheaper technique than the others.
