【摘要】 对 4 0Cr钢活塞端面出现的锯齿状裂纹进行了检验和分析。结果表明 ,活塞开裂的主要原因是表面淬火加热时的局部温度过高 ,导致过热、过烧更多还原

【Abstract】 The sawtooth cracks on the end-plane of 40Cr steel pistons was detected and analyzed.The results show that the reasons causing cracking is mainly due to locally over-heated and over-burnt of the piston during the surface quenching.更多还原