【摘要】 对不同基体球铁的抗热疲劳性作了实验研究。结果表明，在活塞使用温度范围内，下贝氏体基体具有很高的耐热疲劳性；加入合金元素有利于基体的抗热疲劳性提高；回火则使基体的抗热疲劳性下降。更多还原

【Abstract】 The resistance to thermal fatigue on ductile iron is studied in detail. The results reveal that,in the range of piston working temperature,the resistance to thermal fatigue of lower bainite is best,adding alloy elements Cu,Mo is beneficial to it,tempering is harmful to it.更多还原