等温淬火球墨铸铁(ADI)的低温性能与环境脆性  

Low Temperature Properties and Environmental Brittleness of Austempered Ductile Iron

作　　者：龚文邦 杨振阳 刘金城 张民堂 孙利 袁志刚 凌远征 GONG Wen-bang;YANG Zhen-yang;LIU Jin-cheng;ZHANG Min-tang;SUN Li;YUAN Zhi-gang;LING Yuan-zheng(College of Mechanical Engineering&Automation of Wuhan Textile University,Wuhan 430200,Hubei,China;Ferrous Alloys Commission of the World Foundry Organization,Shenyang 110022,Liaoning,China;Henan Aoudi Casting Co.,Ltd.,Hebi 456750,Henan,China)

机构地区：[1]武汉纺织大学机械工程与自动化学院,湖北武汉430200 [2]世界铸造组织铁基委员会,辽宁沈阳110022 [3]河南欧迪艾铸造有限公司,河南鹤壁456750

出　　处：《铸造》2022年第6期741-745,共5页Foundry

摘　　要：论述了ADI的低温冲击韧度、断裂韧度及环境脆化问题。ADI的冲击韧度随温度下降而降低,但在-40℃条件下仍保持室温冲击韧度的约70%;ADI的断裂韧度随温度下降而降低,在-60℃时具有大约室温断裂韧度的60%~80%。在有水或氢存在的环境下,当受力超过屈服极限时,ADI材料有明显的脆化现象,通常ADI零件的工作应力远小于材料的屈服强度,由水脆化引起的ADI零件失效非常少见。This paper discussed the low temperature impact toughness,fracture toughness and environmental brittleness of austempered ductile iron(ADI).The impact toughness of the ADI decreases with the decreasing of temperature,but it remains about 70%of room temperature impact toughness at-40℃.The fracture toughness of the ADI decreases with temperature and is 60%-80%of room temperature fracture toughness at-60℃.In the presence of water or hydrogen,when the force exceeds the yield strength,the ADI has obvious brittleness.However,usually the working stress of the ADI parts is much less than the yield strength of the material,and the failure of the ADI parts caused by the water brittleness is very rare.

关 键 词：ADI 低温性能 环境脆性 

分 类 号：TG132.3[一般工业技术—材料科学与工程]