【摘要】 本文首次将趋于成熟的相变诱发塑性钢(TRIP钢)生产技术应用到钢管的生产领域,以冷拔钢管为原料,分别利用两阶段热处理和连续热处理两种方式成功开发出具有铁素体、贝氏体、残余奥氏体和少量马氏体组织的薄壁TRIP钢无缝管,并利用环形拉伸以及冷弯等试验手段对其成形性能进行了试验研究。研究结果表明,TRIP钢无缝管具有较好的冷成形性能,可以在内高压成形等领域推广应用。另外,课题组开发的连续热处理设备完全可以用来生产TRIP钢管,为未来工业生产提供了重要参考。更多还原

【Abstract】 In the present study,the production technology of transformation induced plasticity(TRIP)steel was firstly introduced in the steel tube manufacture field. The TRIP steel tubes with a microstructure of ferrite,bainite,retained austenite and a little martensite were successfully fabricated with both of the two-stage heat treatment technique and continuous heat treatment technique using a cold drawn steel tube. The ring tensile test and cold bending process were carried out to study the formability of the newly developed TRIP seamless steel tube. The results showed that the TRIP seamless steel tubes have a good cold formability,and they are available to be used in the tube hydroforming process. In addition,the equipment of continuous heat treatment developed in the current study can be used to produce TRIP steel tube and it may serve as an important reference for the industrial production of TRIP steel tube.更多还原