Fe70Cr10P13C7合金激光非晶化研究

CORROSION BEHAVIOR OF AMORPHOUS Fe70Cr10P13C7 ALLOY LAYER PREPARED BY LASER GLAZING

Ｆｅ７０Ｃｒ１０Ｐ１３Ｃ７是一种可形成非晶态的合金，它除具有比一般结构钢高得多的断裂强度外，还具有特别突出的耐腐蚀性能。用２～５ｋｗ连续波ＣＯ２激光在４０Ｃｒ钢基体上首先获得晶态的Ｆｅ７０Ｃｒ１０Ｐ１３Ｃ７宽带熔覆层，而后获得多道搭接的厚约０．２ｍｍ的非晶层。该非晶层动电位极化曲线表明，非晶态Ｆｅ７０Ｃｒ１０Ｐ１３Ｃ７的耐腐蚀性高于１Ｃｒ１８Ｎｉ９Ｔｉ不锈钢和加Ｃｒ的Ｎｉ－Ｎｂ非晶合金。

Fe70Cr10P13C7 alloy is an alloy of easy forming amorphous, which has much higher rupture strength than normal structure steels and excellent corrosion resistance. A wide cladding layer of Fe70Cr 10P13C7 was made on the 40Cr steel substrate by laser cladding with a 2kW laser,and then,transferred into amorphous layer of about 0.2mm thickness with narrow overlaps of partial crystallization by laser glazing with a 5kW laser. Potentiodynamic polarization curves show that the corrosion resistance of the amorphous Fe70Cr10P13C7 is much higher than that of the 1Cr18Ni9Ti stainless steel and amorphous Ni-Nb alloy with addition of Cr.