The results show that P/M valve seats using this technology has high density and high carbon content , and their microstructure are martensite , bainite and networkcarbide.
结果表明,采用该工艺可获得高密度、高碳含量、具有马氏体、贝氏体和网状碳化物组织的粉末冶金气门座。
2
The experimental results show that the uniformity of spherical carbide can be increased, the grade of networkcarbide and banded carbide can be decreased, the austenite grain can be refined.
结果表明,碳化物分布均匀性提高,碳化物网状级别及碳化物带状级别降低,奥氏体晶粒尺寸减小。
3
The results showed that the higher internal stress and serious carbidenetwork in the banded carbide in the inner roll body were the main causes of heavy back-up roll stationary cracking.