Heat treatment of stainless steel - contg boron and having austenitic grain structure

摘要

Austenitic stainless steel contg. 18% Cr and 10% Ni, stabilised with Ti and/or Nb, opt. contg. Mo, and contg. 0.002-0.015% B, comprises soln treatment at =1200 degrees C followed by rapid cooling to create conditions favourable for the subsequent precipitation of carbides and carbonitrides. The process increases the elastic limit without affecting the capacity for deformation. The steel is subsequently precipitation hardened at 600-800 degrees C opt. after hard hammering at 20 degrees C or up to 90 degrees C.