The process comprises: the preparation before nitriding, the preparation period, the temperature-rise period and the temperature-fallperiod of the nitriding process.
工艺过程为:氮化前的准备工作,氮化过程的准备阶段、升温阶段和降温阶段。
2
Origins of crack in JinKeng arch dam that are discussed in this article are variety, but the direct origin is that dam body suffers sudden fall of temperature in operating period.