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430不銹鋼冷軋板高溫退火過程中再結晶織構的定量分析

Quantitative analysis of the recrystallized textures of cold-rolled 430 stainless steel during high-temperature annealing

  • 摘要: 在750、800、825和850℃溫度下,利用Gleeble1500熱模擬試驗機對430不銹鋼冷軋薄板的等溫退火過程進行了詳細的實驗研究,分析了退火過程中再結晶織構和組織的變化規律,并對關鍵織構體積分數的演變進行了定量分析.結果發現:隨著退火過程的進行,α取向線上的織構強度逐漸減弱,而γ取向線上的織構強度則略有加強,并保持在較高的值;再結晶過程中,111和112<110>織構的體積分數逐漸降低,而100和隨機取向晶粒的體積分數逐漸增加.定量分析表明,退火溫度越低,完全再結晶后材料內部關鍵織構的體積分數越偏離冷軋態.最后,針對111、112<110>、100和隨機取向織構的體積分數在再結晶過程中的演變規律,建立了JMAK型再結晶織構演變動力學模型.

     

    Abstract: Variations in the recrystallized texture and microstructure of cold-rolled 430 stainless steel during isothermal annealing were investigated on a Gleeble-1500 thermal-mechanic simulator at 750, 800, 825 and 850℃, and the evolution of main textures was analyzed quantitatively. As annealing proceeds, the intensity of α-fiber orientation components decreases, but the intensity of γ-fiber components increases slightly and maintains at a higher value. The volume fraction of111 and112<110> decreases as recrystallization proceeds, while the volume fraction of100 and random orientation textures increases. Compared with the cold-rolled state, it is observed that the volume fraction of main textures has greater changes in annealing at low temperature than at high temperature. Finally, variations in the volume fraction of111,112<110>,100 and random orientation textures during recrystallization were described by a JMAK kinetics model.

     

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