电焊机2012，Vol.42Issue(7)：55-60,6.
火焰调修工艺对转向架用钢SMA490BW性能的影响
Research on the influence of SMA490BW properties by flame adjustment for bogies
摘要
Abstract
Flame adjustment technology was employed to rectify the welding distortion of SMA490BW for bogies,and the material's morphology and properties cooled by water spraying with different heating temperature were analyzed,too.The results showed that yield strength,tensile strength and elongation all meet the standard and show ductile fracture feature,which didn't change the material properties.The yield strength,tensile strength was almost the same as before.The elongation was decreased littile.When the heating temperature was about 750℃~850℃ ,the morphology was double phase at Acl and Ac3.The cooled morphology was refined ferrite,pearlite,a small amount granular bainite and original femte.When the temperature was higher than 900℃ and Ac3 temperature,the content of bainite was increased by the austenite fast cooling,so the impact toughness decreased.The annealing process didn't influence the morphology,but can eliminate the inter stress and decreased hardness,then can improve the plastic and toughness properties.关键词
火焰调修工艺/喷水冷却/延性断裂/Ac31/退火工艺Key words
flame adjustion technology/water spraying/ductile fracture/Ac3/annealing process分类
矿业与冶金引用本文复制引用
韩永彬,张志毅,崔明,李丹丹,苟国庆..火焰调修工艺对转向架用钢SMA490BW性能的影响[J].电焊机,2012,42(7):55-60,6.基金项目
国家科技支撑计划资助项目(2009BAG12A07) （2009BAG12A07）
