铌钛处理对汽车外板用烘烤硬化钢磷化特性的影响  

EFFECT OF Nb AND TI TREATMENT ON PHOSPHATE CHARACTERRISTIC OF BAKE HARDENED STEEL USED FOR OUTER SHEET OF AUTOMOBILE

作　　者：方百友[1] 何国柱[1] 张生龙[1] 王颖[1] 

机构地区：[1]宝钢新日铁汽车板有限公司技术质量管理部,上海201900

出　　处：《上海金属》2010年第4期13-15,共3页Shanghai Metals

摘　　要：在实验室模拟对比了经不同冶金工艺(加Nb及加Nb+Ti)处理的两种BH钢的磷化效果。利用扫描电镜SEM及电子探针EPMA分析发现,加Nb+Ti处理的BH钢磷化膜相对均匀稳定。结合GDS表面元素分析结果认为,相对低Mn成分及低温退火处理是获得高品质磷化膜的关键冶金影响因素。The phosphating effects of two BH steels after different processing methods （ Nb- added and Nb-Ti added） were compared by simulation test. With the analysis of SEM and EPMA, it was found that the phosphate coating of BH steel with Nb-Ti treated was more stable and homogeneous. Combined with the GDS analysis, it was concluded that low Mn content and low temperature an- nealing process was a key factor to obtain the high quality phosphate coating.

关 键 词：烘烤硬化钢 铌钛微合金化 磷化特性 MN含量 

分 类 号：TG174.445[金属学及工艺—金属表面处理]