What is obtained with the forging waste heat normalizing and controlled cooling technique is the coarse stable structure in a 20CrMnTi gear, but its cutability is good.

余热正火和常规的正火处理后，再经同样的工艺进行渗碳、淬火和回火处理，试验证明：其渗层和心部的组织、晶粒械性能均同。

Single chamber high pressure gas quenching vacuum furnace,double chamber and multichamber vacuum furnaces implementing the acetylene low pressure carburizing were briefly introduced.

简要介施乙炔低压渗碳的单室高压气淬真空炉,双室多室真空炉。

The mathematic model of one dimensional multi stage carburation is obtained and it can describe every physical phenomenon in carburation.

该文建立多段法渗碳的一维数学模型,用此数学模型能够清晰地描述渗碳过程中每一时段的物理行为。

"carburize:To treat, combine, or impregnate with carbon, as when casehardening steel."

使渗碳,碳化:使与碳一起处理,使与碳混合或使充满碳,如将钢的表面粹火硬化.