摘要
车架管通过窄带钢高频直流电阻焊管后进行冷弯加工成型,在冷弯加工过程中出现开裂现象。通过金相显微镜、扫描电镜、能谱仪等相关试验手段,对造成车架管开裂的原因进行检验分析,认为钢材中的保护渣卷入、硅酸盐夹杂物超标、焊缝处的过热组织、冷加工硬化程度过高等均可能导致车架管开裂。针对不同开裂方式进行研究,提出采取优化炼钢工艺、轧制冷却工艺、焊接工艺等整改措施,有效控制了车架管开裂缺陷,开裂缺陷率由原来的25.5%降至2.7%,提高了成材率。
Narrow strip steel was used to make the frame tubes. The crack occurred to Q195 when frame tubes were formed. The cause of frame tube cracking is studied by the means of scanning electron microscope,OM,EDS. The result shows that the reason of frame tube crack is Fluxes involved,silicate inclusions Excessive,welds tissue overheating and the degree of cold work hardening is high. It aimed at the crack of different way to research and put forward some measures to improve. Many rectification measures like optimizing the steelmaking process,cooling process after rolling and the welding process were proposed according to the researches on various crack modes. Finally,the crack defect frame tube was effectively controlled. The crack defect rate was reduced from initial 25. 5% to 2. 7%,which led to the improvement of the yield.
出处
《钢铁钒钛》
CAS
北大核心
2015年第3期122-126,共5页
Iron Steel Vanadium Titanium
关键词
车架管
冷弯开裂
夹杂物
frame tubes
cold blending crack
inclusion
