制动鼓用含锡蠕墨铸铁的冲击韧性
Impact Toughness of Compacted Graphite Iron Containing Sn Used for Brake Drums
摘 要
研究了不同锡含量蠕墨铸铁的冲击韧性及冲击断口形貌.结果表明:锡主要以固溶的形式均匀分布在基体组织中,在石墨中的分布相对较少;随着锡含量增多,蠕墨铸铁的冲击韧性先增大后减小,锡质量分数为0.057%时,冲击功最高,为9.11 J;锡质量分数为0.003%和0.121%蠕墨铸铁的冲击断口为典型的解理断裂,断口上存在扇形河流花样,游离渗碳体和粗大的蠕虫状石墨易成为裂纹源;锡质量分数为0.028%和0.057%蠕墨铸铁的冲击断口上无解理面,为准解理断裂;适量的锡可提高蠕墨铸铁的冲击韧性,但过量后会使冲击韧性迅速恶化.
锡
元素分布
冲击韧性
compacted graphite iron
Sn
element distribution
impact toughness
Abstract
The impact toughness and impact fracture morphology of compacted graphite iron(CGI) containing Sn were investigated.The results show that Sn mainly solidly dissolved uniformly in the matrix but distributed less in the graphite.With the increase of Sn content,the impact toughness of CGI firstly increased and then decreased,and when the mass fraction of Sn was 0.057%,the impact energy was the highest,up to 9.11 J.The impact fracture of the CGIs containing 0.003% Sn and 0.121% Sn showed typical cleavage fractures and river patterns.Free cementite and bulk vermicular graphite were supposed to be the initial origins of cracks.Fracture of the CGIs containing 0.028% Sn and 0.057% Sn exhibited quasi-cleavage patterns and no cleavage facets were found.Appropriate Sn content helps to increase the impact toughness of CGI but excessive Sn speedily damages the impact toughness.
中图分类号 TG143.49
所属栏目 材料性能及其应用
基金项目
收稿日期 2013/10/27
修改稿日期 2014/11/21
网络出版日期
作者单位点击查看
备注赵靖宇(1977-),男,河南鹤壁人,工程师,硕士.
引用该论文: ZHAO Jing-yu,Lv Ye-zhe,SUN Yu-fu,SI Guang-dong,WU Yue. Impact Toughness of Compacted Graphite Iron Containing Sn Used for Brake Drums[J]. Materials for mechancial engineering, 2015, 39(3): 80～83
赵靖宇,吕烨哲,孙玉福,司光东,吴越. 制动鼓用含锡蠕墨铸铁的冲击韧性[J]. 机械工程材料, 2015, 39(3): 80～83
被引情况:
【1】张全成, "核电用蒸汽发生器减摩板的开发与性能",机械工程材料 39, 56-60(2015)
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【4】ZHANG Dao-wen,LI Zhu,HUANG Ji.Effect of rare earth alloy modification on high carbon equivalent gray cast iron of automotive brake drum[J].Journal of Wuhan University of Technology,2012(8):725-729.
【5】BEHERA A,MISHRA S C.A novel material used in automotive industry:compacted graphite iron[J].Emerging Materials Research,2012(8):1-4.
【6】GORNY M,KAWALEC M.Effects of titanium addition on microstructure and mechanical properties of thin-walled compacted graphite iron castings[J].Journal of Materials Engineering and Performance,2013(5):1519-1524.
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【8】LIM C,GOO B.Development of compacted vermicular graphite cast iron for railway brake discs[J].Metal and Materials International,2011(2):199-205.
【9】杨志超,佘小林,张建新,等.铜、锑及硅含量对厚大断面珠光体球墨铸铁组织和性能的影响[J].机械工程材料,2013,37(4):30-34.
【10】马晓丽,雷富军,刘俊英,等.铜对铸态高强度球墨铸铁性能的影响[J].铸造,2011(12):1245-1248.
【11】刘楠楠,卢德宏,刘星舟,等.合金灰铸铁成分与力学性能关系的研究[J].铸造技术,2010(4):437-439.
【12】张文超,刘晓烈,邹荣.珠光体球铁锡、锑复合处理试验研究[J].热加工工艺,2011(7):51-53.
【13】赵靖宇,吕烨哲,孙玉福,等.锡对蠕墨铸铁显微组织和力学性能的影响[J].铸造,2013,62(10):948-952.
【14】SHABAN M,MOTALLEBZADEH A,HALVAEE A,et al.Effect of Si content and Sn addition on solidification behavior and graphite morphology of compacted graphite iron[J].International Journal of Material Science Innovations,2013(2):87-100.
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