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1·Ductile iron, flame hardening, alloy iron direct hardfacing.

球墨铸铁，火焰淬火铸铁，合金铸铁的直接堆焊。

2·Stated mold material of case flame hardening and application examples.

最后介绍了火焰淬火用模具材料，并列举了实际应用实例。

3·Flame hardening and induction hardening are the methods usually used to harden larger gears.

火焰淬火和感应淬火是经常在大型齿轮上使用的热处理方法。

4·This paper introduces the design of taper bore flame hardening machine, fixtures, nozzles block and the methods to determine hardening temperature and phase balancing time.

介绍了内锥孔火焰淬火机床、工装和喷头的设计以及淬火加热温度和相平衡时间的确定方法。