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齿轮锻坯经等温正火处理后,能获得晶粒度为5～8级均匀分布的珠光体和铁素体组织,硬度散差小,机加工性能优良,渗碳淬火变形小等优点。因此,齿轮锻坯的等温正火已越来越得到汽车行业的重视,等温正火设备也因此得到了广泛的应用。目前社会上普遍使用的是推杆式等温正火设备。此设备对质量在3 kg以上、在料筐中装一到二层的大件非常适用,设备的优良性能也能充分体现。但对于体积小、质量在3 kg以下的齿轮锻坯件的等温正火,推杆式等温正火设备却存在一些不足。几年来,通过对推杆式等温正火设备
After being isothermally normalized, gear forging can obtain pearlite and ferrite structure with uniform distribution of grain size of 5 ~ 8 grade, small hardness dispersion, excellent machinability and small deformation of carburizing and quenching. Therefore, isothermal orthognal gear forging has been getting more and more attention of the automotive industry, isothermal and normalizing equipment has also been widely used. Currently widely used in the community is putter-type isothermal normalizing equipment. The device is more than 3 kg for mass, and it is very suitable for the large one to two layers in the basket. The excellent performance of the device can also be fully reflected. But for the small size, the mass below 3 kg gear forging blanks isothermal normalizing, putter-type isothermal normalizing equipment, there are some shortcomings. Over the past few years, through the push-rod isothermal normalizing equipment