预拉伸对TRIP钢微观组织及成形性能的影响
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中图分类号：TG142.1 文献标识码：A DOI：10.7535/hbkd.2025yx04009
Influence of pre-stretching on microstructure and formability of TRIP steel
LIU Po1，WANG Runzheng 2，3 ，LI Wang²，4，CHEN Longmao¹，MA Haikun 2，4
LI Qing5，6，HAN Pengbiao²，3
（1.Guangxi Key Laboratoryof Special Engineering Equipment and Control，Guilin Universityof Aerospace Technology， Guilin，Guangxi 541004，China;
2.Scholof Materials ScienceandEnginering，Hebei UniversityofScienceand Technology，Shijiazuang，Hebei O5oo18，China; 3.Hebei Key Laboratory of Material Near-Net Forming Technology，Shijizhuang，Hebei O5oo18，China;
4．Hebei Short Process Steelmaking Technology Innovation Center，Shijiazhuang，Hebei O5o018，China; 5.Hebei Aerospace Superally Industry Technology Research Institute，Xingtai，Hebei O5480o，China; 6.Zhong Hang Shang Da Superalloys Company Limited，Xingtai，Hebei O548oo，China）
Abstract：To study theefectof pre-deformation onmartensitictransformationand microstructuralevolution in transformationinduced plasticity（TRIP）stels，andtoivestigate theformingablityofTRIPsteels，theTRIP590stelplate was selected as the testingmaterial，and pre-stretching in the range of 0～0.12 was applied on two sizes of specimens（standard specimenand wide specimen）.Tensile testing and microstructure observation wereconductedonthe pre-stretched specimens. The efectof pre-stretching on the anisotropy and bulging propertiesof wide specimens wasanalyzed.The results show that pre-stretchingcausesacertaindegreeofmartensitictransformationinTRIPsteel，andalargerprestretching producesmore dislocations，bringing inincreaseinmaterialstrengthanddecreaseinplasticity；Thehighestproductof strengthandelongation is obtained at pre-stretchofO.O2；Thelargerpre-stretchalsohasanefectonmaterialanisotropy，and elongationof the 90∘ oriented specimenisaliter higher;the peak loadandcuppingvalue gradualldecrease with increaseof pre-stretch.Moderate pre-stretching canimprove theoverallperformanceof the TRIPsteel，whileexcesivepre-stretchingreducesitsformability， which provides reference for structure design and formability of TRIP.
Keywords：ferous metalsadtheirallys；martensitephasetransformation；TRIPstel；microstructure；prestretching；cupbulging
目前，汽车工业发展迅速，汽车的安全问题愈发重要，这就对汽车用钢的强度和塑性提出了更高的要求，先进汽车用钢的开发展现出巨大的发展潜力和需求[1-2]。（剩余11866字）