預(yù)拉伸對(duì)TRIP鋼微觀組織及成形性能的影響

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中圖分類(lèi)號(hào)：TG142.1 文獻(xiàn)標(biāo)識(shí)碼：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，汽車(chē)工業(yè)發(fā)展迅速，汽車(chē)的安全問(wèn)題愈發(fā)重要，這就對(duì)汽車(chē)用鋼的強(qiáng)度和塑性提出了更高的要求，先進(jìn)汽車(chē)用鋼的開(kāi)發(fā)展現(xiàn)出巨大的發(fā)展?jié)摿托枨骩1-2]。（剩余11866字）