Ordinary gas nitriding is quickened greatly by pre-oxidating and increasingfurnace atmosphere pressure so as to shorten production period,save power,and obtain obvi-ous economic benefit.

• 通过预氧化和增加护任，使普通气体诊氛的速度大大加快，从而缩短了生产周期，节约了能源，取得了明显的经济效益。