Nbfc dispersion strengthened corrosion resistant nickel chromium molybdenum alloy and its manufacturing method, steel material having corrosion resistance and abrasion resistant surface surfacing weld layer, manufacturing method thereof, and cold tool

摘要

PROBLEM TO BE SOLVED: To provide an alloy and a steel combining cold wear resistance and corrosion resistance and not conventionally present, methods for producing them, and a relatively inexpensive cold tool produced from the alloy and steel.SOLUTION: As a steel 1 in which a build-up weld layer 3 is formed on the surface of a metallic material to be formed into a base material 2 by a plasma powder build-up welding technique such as build-up welding, a mixture obtained by dispersing a small amount of the fine particles of niobium carbide with the average particle diameter below 45 m into a Hastelloy is applied upon the welding, thus the wear resistance provided in the niobium carbide is imparted without damaging the wear resistance characteristically provided in the Hastelloy. Further, as the alloy in which the fine particles of the niobium carbide below 45 m are dispersed into the Hastelloy, it is a new NbC dispersion strengthened Hastelloy combining corrosion resistance and wear resistance.