淬火性能研究 quenching properties study

淬火特性曲线 characteristic curve of hardening

淬火敏感性 quench sensitivity ; quenching sensitivity

淬火特性 hardening characteristic ; hardenability characteristic

水溶性淬火油 aqueous quenchant

磁性淬火试验 magnetic quench test

淬火脆性 brittleness due to tempering

淬火层深均匀性良好 depth of surface hardening is great