油淬回火钢丝自本世纪二十年代问世以来,在国外得到广泛的应用。这主要是油淬回火钢丝具有一系列的优点:钢丝的弹性区高,最大许用应力大,从而能充分发挥材料的潜力;连续式淬回火使钢丝表面氧化脱碳极少;采用分级冷却可减小钢丝内应力;钢丝挺直性好,卷出的弹簧尺寸精度高;具有良好的松弛性能;国外采用涡流探伤可以保证表面质量。目前,我国由于对油淬回火钢丝的各种性能尚无实践数据,因此至今多沿用铅浴淬火冷 Oil quenching and tempering wire since the advent of the 20th century has been widely used abroad. This is mainly oil quenched and tempered steel wire has a series of advantages: high elastic steel wire, the maximum allowable stress, which can give full play to the potential of the material; continuous quenching and tempering the surface of the wire oxidation decarburization very little; using grading Cooling can reduce the stress within the wire; wire straightness, rolled out of the spring high dimensional accuracy; with good relaxation properties; foreign eddy current testing can ensure the quality of the surface. At present, due to the fact that there is no practical data on the various properties of oil-quenched and tempered steel wire in our country,