The vanadium/niobium microalloyed steel do not show abnormal coarsening of austenite grains when it was austenitized in the te...

• 在渗碳温度范围内长时间保温时不会发生奥氏体晶粒的异常长大;晶粒细化也使其渗碳层的组织和性能得到改善。