热空气老化对汽车悬置用NR疲劳的影响研究  

Study on the effect of hot air aging on the fatigue of NR for automotive suspension

作　　者：王伟健 郑挺 李咏斌 Wang Weijian;Zheng Ting;Li Yongbin(Guangzhou Automobile Group Co.LTD.Automotive Engineering Institute,Guangzhou 511434,Guangdong,China)

机构地区：[1]广州汽车集团股份有限公司汽车工程研究院,广东广州511434

出　　处：《橡塑技术与装备》2024年第10期18-22,共5页China Rubber/Plastics Technology and Equipment

摘　　要：以某汽车悬置用NR硫化胶为研究对象。分别研究了90℃、100℃、110℃条件下200 h的热空气老化对7个不同拉伸倍数(1.6、1.8、2.0、2.2、2.4、2.6、2.8)的单轴动态拉伸疲劳次数的影响。通过试验研究发现:NR的疲劳次数随着热老化温度的升高呈现明显的下降趋势,但1.6拉伸倍数不同温度下,疲劳次数保持率均≥80%。温度为110℃或拉伸倍数≥2.4则出现急剧下降。Taking NR vulcanizing rubber for a certain automobile suspension as the research object,this paper studied the effect of 200 hours of hot air aging at 90℃,100℃,and 110℃on the uniaxial dynamic tensile fatigue times of 7 different stretching ratios(1.6,1.8,2.0,2.2,2.4,2.6,2.8).Through experimental research,it was found that the fatigue frequency of NR showed a significant downward trend with the increase of thermal aging temperature;However,at different temperatures,the fatigue cycle retention rate of 1.6 stretch times is≥80%;When the temperature is 110℃or the stretching ratio is≥2.4,a sharp decrease occurs.

关 键 词：天然橡胶 热空气老化 拉伸疲劳 

分 类 号：TQ332[化学工程—橡胶工业]