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鍛造合金(jin)鋼(gang)中的奧氏體(ti)變量

文章來源：sjzwx 更新時間：2014-02-07 09:52:10

 熱(re)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)變(bian)(bian)(bian)的(de)(de)(de)(de)應(ying)(ying)變(bian)(bian)(bian)量，合金鋼中(zhong)(zhong)的(de)(de)(de)(de)奧(ao)(ao)氏(shi)(shi)(shi)體(ti)發生強(qiang)烈(lie)的(de)(de)(de)(de)應(ying)(ying)變(bian)(bian)(bian)硬化(hua)。這(zhe)些過(guo)(guo)(guo)程(cheng)(cheng)導致(zhi)了(le)熱(re)加(jia)(jia)(jia)工(gong)亞(ya)(ya)(ya)結(jie)(jie)構(gou)(gou)的(de)(de)(de)(de)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)成(cheng)(cheng)。這(zhe)種(zhong)亞(ya)(ya)(ya)結(jie)(jie)構(gou)(gou)具有高(gao)位錯(cuo)密度，均勻分布或形(xing)(xing)(xing)(xing)(xing)(xing)(xing)成(cheng)(cheng)脆狀亞(ya)(ya)(ya)結(jie)(jie)構(gou)(gou)豹特(te)(te)征(zheng)。隨(sui)著形(xing)(xing)(xing)(xing)(xing)(xing)(xing)變(bian)(bian)(bian)程(cheng)(cheng)度的(de)(de)(de)(de)增加(jia)(jia)(jia)，(達到對應(ying)(ying)于(yu)建(jian)立強(qiang)化(hua)和軟(ruan)化(hua)過(guo)(guo)(guo)程(cheng)(cheng)之間動平衡(heng)的(de)(de)(de)(de)變(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)程(cheng)(cheng)度￡。二)，盡管純(chun)強(qiang)化(hua)仍是主要的(de)(de)(de)(de)，但動態(tai)多(duo)邊化(hua)也(ye)在(zai)發展，象發生在(zai)等軸亞(ya)(ya)(ya)晶(jing)粒那樣，形(xing)(xing)(xing)(xing)(xing)(xing)(xing)成(cheng)(cheng)一(yi)定取向的(de)(de)(de)(de)多(duo)邊形(xing)(xing)(xing)(xing)(xing)(xing)(xing)亞(ya)(ya)(ya)晶(jing)界，并(bing)且隨(sui)著應(ying)(ying)變(bian)(bian)(bian)的(de)(de)(de)(de)增加(jia)(jia)(jia)多(duo)邊化(hua)范圍的(de)(de)(de)(de)體(ti)積(ji)增加(jia)(jia)(jia)。亞(ya)(ya)(ya)晶(jing)粒邊界進(jin)一(yi)步完(wan)善，且包(bao)括奧(ao)(ao)氏(shi)(shi)(shi)體(ti)的(de)(de)(de)(de)熱(re)變(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)及(ji)隨(sui)后冷(leng)卻(que)的(de)(de)(de)(de)鋼的(de)(de)(de)(de)高(gao)攝機(ji)械(xie)處(chu)理(IITMl)，目的(de)(de)(de)(de)在(zai)于(yu)通過(guo)(guo)(guo)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)成(cheng)(cheng)完(wan)全(quan)發展的(de)(de)(de)(de)亞(ya)(ya)(ya)結(jie)(jie)構(gou)(gou)，提高(gao)奧(ao)(ao)氏(shi)(shi)(shi)體(ti)的(de)(de)(de)(de)機(ji)械(xie)性(xing)(xing)能，(例如耐高(gao)溫鋼和抗腐(fu)蝕(shi)鋼)并(bing)且由于(yu)遺(yi)傳(chuan)影響著奧(ao)(ao)氏(shi)(shi)(shi)休轉變(bian)(bian)(bian)產(chan)(chan)物的(de)(de)(de)(de)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)態(tai)和亞(ya)(ya)(ya)結(jie)(jie)構(gou)(gou)特(te)(te)性(xing)(xing)，因(yin)而也(ye)提高(gao)奧(ao)(ao)氏(shi)(shi)(shi)休轉變(bian)(bian)(bian)產(chan)(chan)物(馬氏(shi)(shi)(shi)體(ti)，貝氏(shi)(shi)(shi)體(ti)，珠(zhu)光體(ti))的(de)(de)(de)(de)機(ji)械(xie)性(xing)(xing)能。亞(ya)(ya)(ya)結(jie)(jie)構(gou)(gou)是決(jue)定結(jie)(jie),#Y，從(cong)而也(ye)是決(jue)定奧(ao)(ao)氏(shi)(shi)(shi)體(ti)轉變(bian)(bian)(bian)產(chan)(chan)物的(de)(de)(de)(de)全(quan)部(bu)機(ji)械(xie)性(xing)(xing)能的(de)(de)(de)(de)重(zhong)(zhong)要因(yin)索。j正(zheng)是這(zhe)個(ge)原因(yin)，對有關(guan)奧(ao)(ao)氏(shi)(shi)(shi)休組(zu)織的(de)(de)(de)(de)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)成(cheng)(cheng)特(te)(te)征(zheng).及(ji)在(zai)IITMT循(xun)環中(zhong)(zhong)的(de)(de)(de)(de)熱(re)變(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)條件下，奧(ao)(ao)氏(shi)(shi)(shi)體(ti)組(zu)織的(de)(de)(de)(de)變(bian)(bian)(bian)化(hua)特(te)(te)點給的(de)(de)(de)(de)極大(da)的(de)(de)(de)(de)關(guan)注(zhu)。熱(re)變(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)中(zhong)(zhong)奧(ao)(ao)氏(shi)(shi)(shi)體(ti)結(jie)(jie)構(gou)(gou)的(de)(de)(de)(de)轉變(bian)(bian)(bian)可以(yi)從(cong)變(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)應(ying)(ying)力(li)的(de)(de)(de)(de)相應(ying)(ying)變(bian)(bian)(bian)化(hua)，即通過(guo)(guo)(guo)應(ying)(ying)用(yong)應(ying)(ying)力(li)—應(ying)(ying)變(bian)(bian)(bian)圖形(xing)(xing)(xing)(xing)(xing)(xing)(xing)來(lai)判別。建(jian)立起奧(ao)(ao)氏(shi)(shi)(shi)體(ti)中(zhong)(zhong)亞(ya)(ya)(ya)結(jie)(jie)構(gou)(gou)的(de)(de)(de)(de)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)成(cheng)(cheng)和熱(re)變(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)圖的(de)(de)(de)(de)關(guan)系，對選擇HTMT過(guo)(guo)(guo)程(cheng)(cheng)中(zhong)(zhong)熱(re)變(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)(de)最佳(jia)規(gui)范特(te)(te)別重(zhong)(zhong)要。本文(wen)涉及(ji)到合金鋼中(zhong)(zhong)奧(ao)(ao)氏(shi)(shi)(shi)休在(zai)熱(re)變(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)中(zhong)(zhong)亞(ya)(ya)(ya)結(jie)(jie)構(gou)(gou)的(de)(de)(de)(de)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)成(cheng)(cheng)，以(yi)及(ji)A溫變(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)曲線與有關(guan)的(de)(de)(de)(de)工(gong)藝過(guo)(guo)(guo)程(cheng)(cheng)間的(de)(de)(de)(de)相互關(guan)系。還考慮了(le)通過(guo)(guo)(guo)熱(re)壓(ya)試P所得到的(de)(de)(de)(de)數(shu)據，在(zai)每道軋(ya)制中(zhong)(zhong)模擬亞(ya)(ya)(ya)結(jie)(jie)構(gou)(gou)形(xing)(xing)(xing)(xing)(xing)(xing)(xing)成(cheng)(cheng)的(de)(de)(de)(de)可能性(xing)(xing)。