【摘要】：為了探索連續(xù)退火工藝對TRB板組織與性能的影響,在實驗室采用四輥可逆式冷軋機進行單厚度過渡區(qū)TRB板軋制,對軋制的DP590雙相鋼和22Mn B5熱成形鋼TRB薄板進行模擬連續(xù)退火試驗,利用光學(xué)顯微鏡和掃描電鏡,以及拉伸和硬度試驗方法研究鋼板退火后各厚度區(qū)的組織與力學(xué)性能差別.研究表明:TRB板變厚度區(qū)的最大厚度偏差為0.03 mm,長度誤差1.0 mm.TRB板在連續(xù)退火的冷卻段和過時效段,其薄區(qū)溫度較過渡區(qū)和厚區(qū)的溫度偏低57~20℃,導(dǎo)致DP590鋼板薄區(qū)的抗拉強度和伸長率較高,屈服強度與厚區(qū)的相當,而22Mn B5鋼TRB板的屈服與抗拉強度偏高.在TRB板的變厚度區(qū)內(nèi)維氏硬度波動較小.根據(jù)厚區(qū)的厚度來制定冷軋DP590雙相鋼TRB薄板的連續(xù)退火工藝,將更有利于保證鋼板的組織與力學(xué)性能,對22Mn B5熱成形鋼TRB薄板建議采用罩式退火.
[Abstract]:In order to explore the effect of continuous annealing process on the microstructure and properties of TRB sheet, four high reversible cold rolling mill was used to roll TRB plate in the transition zone of single thickness in laboratory. The microstructure and mechanical properties of rolled DP590 duplex steel and 22Mn B5 hot-formed steel TRB sheet after annealing were studied by means of optical microscope, scanning electron microscope, tensile and hardness tests. The results show that the maximum thickness deviation in the variable thickness region of TRB plate is 0.03 mm, length error. The temperature of the thin zone is 5720 鈩，

本文編號：2404482