precipitation hardening(By adding elements such as 3 per cent copper or aluminium with about 1 per cent titanium to steels containing 17 per cent chromium and 4 to 8 per cent nickel, heat-treatment involving precipitation hardening and / or refrigeration at - 70°C can be applied, and strengths of up to 1500 newtons per sq. mm can be obtained. 通过向含有17% 的铬和4% ~8% 的镍的钢中加人3%的铜或铝以及约 1%的钛，还可以进行包括沉淀硬化在内的热处理和/或在 -70°C 下致冷，由此可获得强度高达1500 N/ mm² 的钢。)
alumina deposition(The benefit achieved with the doloma nozzle is the reduction in argon usage while eliminating alumina deposition on the wall of tundish nozzle. 煅烧白云石水口的优点是降低了氩气用量，同时又避免了 Al₂O₃ 在中间包水口壁上沉积。)
