摘要
利用扫描电镜对高强度螺栓断口进行了微观形貌观察与分析。结果表明,由于冶炼或浇注时,钢液内混入了耐火材料碎块,其杂质元素向晶界偏聚引起局域性的晶界脆化,从而导致螺栓在较低应力状态下发生断裂。
Based on the microanalyse, the fracture of the high strength stud bolt was analyzed by scanning electron microscope （ SEM ）. It was observed that the tramp elements in the fire-proof material particles have separated out to the crystal boundary so that lead to local brittle crystal boundary, therefore the stud bolt was broken under small stress conditions.
出处
《理化检验（物理分册）》
CAS
2006年第1期28-30,共3页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
