Method of making aluminized strengthened steel

摘要: A steel article which is made of carbon or low alloy steel, with a prescribed chemical composition, heat treated so that its yield strength increased to minimum 60,000 psi and subsequently dipped spray covered aluminum then heated interdiffuse metal the iron in matrix, thereby forming new intermetallic layer an integral part essentially aluminum-iron alloy, all manner does not lower below psi. In preferred form invention, austenitized above critical temperature for about 15 minutes more rapidly cooled 600° F. transform austenite structure much stronger martensitic reheated 1341° temper martensite. Aluminum applied outer surface cleaned by dipping molten otherwise, again 1000° but whereupon substantial quantity interdiffuses layer. The interdiffusion process carried out without reducing level This method provides inexpensive, high-strength tool enhanced corrosion resistance.