【摘要】 为改善汽车的燃油经济性、减小汽车零件的质量,对汽车上大量应用的紧固件———螺栓的强度要求越来越高。但螺栓强度超过1200N/mm2时其延迟断裂的倾向增大,因此研究开发抗延迟断裂性能优良的超高强度螺栓用钢成为一项重要课题。重点介绍了国内外螺栓研究的最新成果。更多还原

【Abstract】 In order to improve fuel efficiency and reduce weight of auto parts,the requirements for mass-used fasteners in auto are becoming very high.When the strengths of bolts are above1200N/mm 2 ,the trend of delay rupture is getting obvious.So it is a task to develop super high strength bolt steel which have good anti-delay rupture performance.This paper introduces latest achievements of bolts domestic and abroad.更多还原