Click to edit Master title style,Click to edit Master text styles,Second level,E N G I N E E R E D,S Y S T E M S,Materials for valve cover and oil pan gaskets,Vehicle Components,Trelleborg Forsheda,内容,ASTM D2000,定义,AEM,vs,ACM,的性能对比,在油中的压缩永久变形,(CS),空气中的压缩应力松弛,(CSR),油中的压缩应力松弛,(CSR),耐流体性能,结论,ASTM D2000 Classification,AEM vs.ACM,性能比较,如果要达到同等性能,两者的价位相比,,AEM,更低,添加硫化剂的,ACM,的储存期是,2,周,AEM,是,3,个月,.,工作温度范围,AEM,:,-30 to+150,,,ACM-20 to+140.,AEM,出色的低温柔韧性能使它在低温下可以保持很好的密封性能,.,AEM,的拉伸强度,伸长率和撕裂强度等性能全面好于,ACM,.,AEM vs.ACM,Properties,新型,ACM,有更好的,压缩永久变形,(CS).,AEM,的,压缩应力松弛,(CSR,).,AEM,的耐侯和耐臭氧性能更好,.,一般,ACM,的耐油性能更好,.,压缩永久变形,in oil,15 W 40,T=125C,油中的压缩永久变形,15 W 40,T=175C,压缩应力松弛,压缩应力松弛 测试的是恒定压缩应变下保持的压缩作用力(及密封力),与长时间压缩永久变形相比更接近实际情况,OEMs,用,CSR,对密封件和胶管用原材料评价分级,压缩应力松弛,for AEM 50,CSR,比较,CSR,in,Castrol,SLX 0W30 Super,Longlife,II,T=150 C,CSR,in Mobil SAE 5W40 Cecilia 20,T=150 CAEM vs.ACM,耐流体性能,拉伸强度变化,DAF spec.42021/42025,耐流体性能,伸长率变化,DAF spec.42021/42025,耐流体性能,硬度变化,DAF spec.42021/42025,耐流体性能,体积变化率,%,DAF spec.42021/42025,结论,AEM,是最适合发动机密封件和油箱盖垫片的材料,因为,:,价格,工作温度范围,物理性能,动态疲劳寿命,CSR,耐磨性,耐侯性和耐臭氧性,