摘要
结合宏观裂纹和微观组织分析,通过试验来确定某铸钢轮材料的热疲劳破坏临界循环上限温度。实验发现,在循环上限温度为600℃时,试样开始出现开裂倾向;而循环上限温度为700℃时试样产生急剧破坏;低于600℃时,试样没有产生明显的热疲劳破坏。由此可以确定,600℃可大致作为该铸钢轮材料开始产生热疲劳急剧破坏时的临界循环上限温度。试验还发现表面氧化腐蚀是该铸钢材料热疲劳破坏的一种重要形式。
The maximal critical cycling temperature of thermal fatigue damage on certain cast steel wheal material was roughly measured by experiments combined with the macro crack and microstructure analysis. It was found that the samples just began to crack when the cycling maximal temperature reached 600℃ and cracked seriously at 700℃, without obvious thermal damage below 600%. Therefore it could be determined that 600% was approximately the maximal critical cycling temperature of thermal fatigue damage of this kind of cast steel wheel material. In addition, it was also found that surface oxidation corrosion was one of the important forms for the thermal fatigue damage to the material.
出处
《上海金属》
CAS
2007年第1期34-37,共4页
Shanghai Metals
关键词
铸钢轮
热疲劳裂纹
氧化腐蚀
热循环上限温度
Cast Steel Wheel, Thermal Fatigue Crack, Oxidation Corrosion, MaximalCycling Temperature
