首页>
外国专利>
Method of reinforcing of railway wheels and railway wheels with hardening of the working surface
Method of reinforcing of railway wheels and railway wheels with hardening of the working surface
展开▼
机译:通过硬化工作面来加强铁路车轮和铁路车轮的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
FIELD: machine building.;SUBSTANCE: metal surface strengthening is carried out by means of low temperature plasma arc of direct action. As plasma generating gas there is used argon, mixture of argon with helium, and mixture of argon with carbon containing gases. Also, heating is performed with magnetic oscillation of arc with triangle shape of voltage pulse, scanning amplitude 20-45 mm and distance of treatment 10-30 mm. A strengthened surface layer consists of several sub-layers: at depth of 0.2-0.8 mm - structure of martensite with inclusions of upper bainite, - from 0.8 to 1.8 mm - trosto-martensite structure, - from 1.8 to 2.5 mm - sorbitic-martensite structure, - from 2.5 to 3 mm - sorbite, - over 3 mm - ferrite-pearlite structure of basic metal.;EFFECT: raised efficiency of strengthening process, 3 times increased wear resistance of strengthened working zone of wheel, 3 times reduced probability of development of hydrogen metal brittleness and tendency to brittle fracture.;2 cl, 1 tbl
展开▼