Steel for hot tube making tool and hot tube making tool

Abstract

Abstract PURPOSE:To manufacture a steel for a hot tube making tool showing excellent durability by preparing a steel having a specified compsn. in which each content of C, Ni, Mo and W is prescribed and each content of N, O and S as impurities is prescribed. CONSTITUTION:A steel for a hot tube making tool is formed into a componental compsn. contg., by weight, >0.08 to <0.65% C, 0.1 to 2.0% Si, 0.2 to 3.0% Mn, 0.5 to 7.0% Ni, total 5.5 to 8% of one or more kinds of Mo and W, 0.005 to 0.2% sol.Al and the balance Fe with inevitable impurities, and in which the content of N, O, P and S in the impurities is each regulated to <=0.02%, <=0.01%, <=0.035% and <=0.03%. In this way, the steel for a hot tube making tool having excellent high temp. deformation resistance, cracking resistance and heat cracking resistance sufficiently satisfiable as a hot tube making tool and easy to form scales excellent in the effect of preventing seizing (lubricity, peeling resistance and wear resistance) can be obtd.

Inventors

• 👤 Yasutaka Okada
• 👤 康孝 岡田

Bibliographic Details