Corrosion resistant stainless steel,申请号US19940331801-传众专利搜索

Corrosion resistant stainless steel

申请公布号：US5496422(A)

申请号：US19940331801

申请日期：1994.10.31

申请公布日期：1996.03.05

申请人：

ISHIKAWAJIMA-HARIMA HEAVY INDUSTRIES CO., LTD.

发明人：MORISHIGE, NORIO;HIRANO, KENJI;ISHIKAWA, KIYOFUMI;FURUYA, SHUJI

分类号：B23K26/14;B23K35/30;B23K35/32;(IPC1-7):C21D1/09

主分类号：B23K26/14

摘要：The corrosion resistance inherent in stainless steel is further improved by a cladding layer provided on the surface thereof. The cladding layer is formed of a coating material which is applied onto the surface of the stainless steel and, then, burnt to be fused by laser beams. The coating material contains a larger amount of Cr than that of the stainless steel. The thus fused material and a fused portion of the stainless steel are mixed with each other to form the cladding layer of remarkable corrosion resistance due to a larger amount of Cr contained therein. The formation of the cladding layer on the inner surface of a small diameter pipe is enabled by a coating film shaping device which has a jig for shaping the applied material into a film of a uniform thickness and by a laser irradiation torch which has an arrangement for emitting the laser means radially outward from the inside of the pipe.