結(jie)果表(biao)明,65錳(meng)鋼板當變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)方(fang)式由簡單(dan)剪切(qie)(qie)變(bian)(bian)(bian)(bian)為單(dan)向(xiang)拉(la)伸(shen)再(zai)變(bian)(bian)(bian)(bian)為平面應變(bian)(bian)(bian)(bian) 變(bian)(bian)(bian)(bian)為等(deng)雙拉(la)時(shi),奧(ao)(ao)氏(shi)體(ti)的(de)(de)穩(wen)定性逐(zhu)漸下(xia)降。通過EBSD觀察發(fa)現,不同(tong)(tong)變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)方(fang)式下(xia),隨著應變(bian)(bian)(bian)(bian)量(liang)的(de)(de)增(zeng)(zeng)加,奧(ao)(ao)氏(shi)體(ti)逐(zhu)漸發(fa)生畸變(bian)(bian)(bian)(bian),部分(fen)奧(ao)(ao)氏(shi)體(ti)發(fa)生馬氏(shi)體(ti)相(xiang)變(bian)(bian)(bian)(bian),鐵素體(ti)內部幾何必要位錯密度增(zeng)(zeng)加。結(jie)合織構分(fen)析、Schmid因(yin)子及外力(li)(li)(li)所做功(gong)(gong)的(de)(de)計算可(ke)知,變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)方(fang)式由單(dan)向(xiang)拉(la)伸(shen)變(bian)(bian)(bian)(bian)為平面應變(bian)(bian)(bian)(bian)再(zai)變(bian)(bian)(bian)(bian)為等(deng)雙拉(la)時(shi),奧(ao)(ao)氏(shi)體(ti)Schmid因(yin)子增(zeng)(zeng)加,同(tong)(tong)時(shi)機械外力(li)(li)(li)所做的(de)(de)功(gong)(gong)上升,兩種因(yin)素共同(tong)(tong)作用導致奧(ao)(ao)氏(shi)體(ti)的(de)(de)穩(wen)定性下(xia)降。而在(zai)簡單(dan)剪切(qie)(qie)變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)時(shi),奧(ao)(ao)氏(shi)體(ti)Schmid因(yin)子較高(gao),而機械外力(li)(li)(li)所做的(de)(de)功(gong)(gong) ,機械外力(li)(li)(li)產(chan)生的(de)(de)相(xiang)變(bian)(bian)(bian)(bian)驅動力(li)(li)(li)較小,導致簡單(dan)剪切(qie)(qie)變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)時(shi)奧(ao)(ao)氏(shi)體(ti)的(de)(de)穩(wen)定性較高(gao)。以奧(ao)(ao)氏(shi)體(ti)在(zai)不同(tong)(tong)應變(bian)(bian)(bian)(bian)速率和(he)變(bian)(bian)(bian)(bian)形(xing)(xing)(xing)(xing)(xing)(xing)方(fang)式下(xia)的(de)(de)穩(wen)定性為理論依據,利用彎曲回(hui)彈(dan)實驗研究了成(cheng)形(xing)(xing)(xing)(xing)(xing)(xing)工藝參數對中錳(meng)鋼回(hui)彈(dan)行為的(de)(de)影響(xiang)。

結果表明,彎曲變(bian)形(xing)(xing)(xing)(xing)后中(zhong)(zhong)錳(meng)(meng)(meng)鋼(gang)厚度(du)方(fang)向上發(fa)生不均勻變(bian)形(xing)(xing)(xing)(xing)。65mn錳(meng)(meng)(meng)冷(leng)軋鋼(gang)板(ban)在增(zeng)(zeng)加(jia)(jia)沖壓(ya)速(su)度(du)的(de)(de)(de)(de)(de)(de)(de)條件(jian)下,彎曲內(nei)層區(qu)(qu)域(yu)(yu)的(de)(de)(de)(de)(de)(de)(de)變(bian)形(xing)(xing)(xing)(xing)程度(du)較(jiao)低(di),導致(zhi)發(fa)生馬氏(shi)(shi)體(ti)(ti)(ti)相(xiang)變(bian)的(de)(de)(de)(de)(de)(de)(de)奧(ao)氏(shi)(shi)體(ti)(ti)(ti)體(ti)(ti)(ti)積分數減(jian)少及(ji)幾何必要位(wei)錯(cuo)密(mi)(mi)度(du)增(zeng)(zeng)加(jia)(jia)趨勢(shi)減(jian)弱(ruo)(ruo),使(shi)(shi)(shi)得(de)加(jia)(jia)工(gong)硬化(hua)(hua)能力減(jian)弱(ruo)(ruo),從而(er)(er)中(zhong)(zhong)錳(meng)(meng)(meng)鋼(gang)的(de)(de)(de)(de)(de)(de)(de)回彈(dan)(dan)角(jiao)降(jiang)低(di)。在增(zeng)(zeng)加(jia)(jia)彎曲角(jiao)度(du)的(de)(de)(de)(de)(de)(de)(de)條件(jian)下,彎曲內(nei)層區(qu)(qu)域(yu)(yu)的(de)(de)(de)(de)(de)(de)(de)變(bian)形(xing)(xing)(xing)(xing)程度(du)增(zeng)(zeng)加(jia)(jia),使(shi)(shi)(shi)得(de)發(fa)生馬氏(shi)(shi)體(ti)(ti)(ti)相(xiang)變(bian)的(de)(de)(de)(de)(de)(de)(de)奧(ao)氏(shi)(shi)體(ti)(ti)(ti)體(ti)(ti)(ti)積分數增(zeng)(zeng)加(jia)(jia)以及(ji)幾何必要位(wei)錯(cuo)密(mi)(mi)度(du)增(zeng)(zeng)加(jia)(jia),導致(zhi)加(jia)(jia)工(gong)硬化(hua)(hua)增(zeng)(zeng)加(jia)(jia),從而(er)(er)中(zhong)(zhong)錳(meng)(meng)(meng)鋼(gang)的(de)(de)(de)(de)(de)(de)(de)回彈(dan)(dan)角(jiao)增(zeng)(zeng)加(jia)(jia)。當凹模(mo)跨距增(zeng)(zeng)加(jia)(jia)時,彎曲內(nei)層區(qu)(qu)域(yu)(yu)和(he)外層區(qu)(qu)域(yu)(yu)的(de)(de)(de)(de)(de)(de)(de)變(bian)形(xing)(xing)(xing)(xing)均降(jiang)低(di),使(shi)(shi)(shi)得(de)發(fa)生馬氏(shi)(shi)體(ti)(ti)(ti)相(xiang)變(bian)的(de)(de)(de)(de)(de)(de)(de)奧(ao)氏(shi)(shi)體(ti)(ti)(ti)體(ti)(ti)(ti)積分數及(ji)幾何必要位(wei)錯(cuo)密(mi)(mi)度(du)呈現減(jian)弱(ruo)(ruo)趨勢(shi)。在相(xiang)同(tong)的(de)(de)(de)(de)(de)(de)(de)總(zong)變(bian)形(xing)(xing)(xing)(xing)條件(jian)下,凹模(mo)跨距的(de)(de)(de)(de)(de)(de)(de)增(zeng)(zeng)加(jia)(jia),使(shi)(shi)(shi)得(de)彈(dan)(dan)性變(bian)形(xing)(xing)(xing)(xing)階段所占比例增(zeng)(zeng)大,因(yin)而(er)(er)中(zhong)(zhong)錳(meng)(meng)(meng)鋼(gang)的(de)(de)(de)(de)(de)(de)(de)回彈(dan)(dan)角(jiao)增(zeng)(zeng)加(jia)(jia)。通過改(gai)變(bian)兩(liang)相(xiang)區(qu)(qu)退火工(gong)藝和(he)軋制方(fang)式研(yan)究了奧(ao)氏(shi)(shi)體(ti)(ti)(ti)體(ti)(ti)(ti)積分數和(he)織(zhi)構(gou)對中(zhong)(zhong)錳(meng)(meng)(meng)鋼(gang)彎曲回彈(dan)(dan)的(de)(de)(de)(de)(de)(de)(de)影響。結果表明,奧(ao)氏(shi)(shi)體(ti)(ti)(ti)體(ti)(ti)(ti)積分數的(de)(de)(de)(de)(de)(de)(de)增(zeng)(zeng)加(jia)(jia),使(shi)(shi)(shi)得(de)材料的(de)(de)(de)(de)(de)(de)(de)彈(dan)(dan)性模(mo)量(liang)增(zeng)(zeng)加(jia)(jia);制備不同(tong)奧(ao)氏(shi)(shi)體(ti)(ti)(ti)體(ti)(ti)(ti)積分數的(de)(de)(de)(de)(de)(de)(de)兩(liang)相(xiang)區(qu)(qu)退火工(gong)藝使(shi)(shi)(shi)得(de)中(zhong)(zhong)錳(meng)(meng)(meng)鋼(gang)具(ju)有不同(tong)的(de)(de)(de)(de)(de)(de)(de)屈(qu)服強度(du)和(he)加(jia)(jia)工(gong)硬化(hua)(hua)。

65mn錳(meng)(meng)冷軋鋼(gang)板彈(dan)性(xing)模(mo)(mo)量(liang)(liang)、屈(qu)服(fu)強(qiang)度(du)和(he)加(jia)工(gong)硬(ying)化的(de)(de)(de)差異共同導致(zhi)回(hui)(hui)彈(dan)角的(de)(de)(de)變化。在不同的(de)(de)(de)奧氏體(ti)(ti)織(zhi)構(gou)(gou)條件下(xia),中錳(meng)(meng)鋼(gang)的(de)(de)(de)彈(dan)性(xing)模(mo)(mo)量(liang)(liang)隨著(zhu)含(han)(han)<111>的(de)(de)(de)織(zhi)構(gou)(gou)組(zu)分強(qiang)度(du)的(de)(de)(de)減弱而降低;同時其加(jia)工(gong)硬(ying)化能力隨著(zhu)含(han)(han)<1-10>和(he)<001>的(de)(de)(de)織(zhi)構(gou)(gou)組(zu)分強(qiang)度(du)的(de)(de)(de)增(zeng)強(qiang)而增(zeng)加(jia)。彈(dan)性(xing)模(mo)(mo)量(liang)(liang)的(de)(de)(de)降低和(he)加(jia)工(gong)硬(ying)化能力的(de)(de)(de)增(zeng)加(jia)是回(hui)(hui)彈(dan)角增(zeng)加(jia)的(de)(de)(de)主要原因。考慮奧氏體(ti)(ti)體(ti)(ti)積(ji)分數和(he)織(zhi)構(gou)(gou)對彈(dan)性(xing)模(mo)(mo)量(liang)(liang)影響的(de)(de)(de)有限元仿(fang)真(zhen)模(mo)(mo)型,能夠(gou)更(geng)地預測實驗(yan)用中錳(meng)(meng)鋼(gang)的(de)(de)(de)回(hui)(hui)彈(dan)行為(wei),其預測的(de)(de)(de)回(hui)(hui)彈(dan)角更(geng)接(jie)近實驗(yan)測定的(de)(de)(de)回(hui)(hui)彈(dan)角。 

眾鑫42crmo冷軋耐磨錳鋼(gang)板圓鋼(gang)金(jin)屬材料(賀州市分公司)常年庫存 Q355NE鋼板充足,憑借雄厚的實力，豐富齊全的 Q355NE鋼(gang)板規格品種，完(wan)善的(de)質量保證，合(he)理的(de)價格，優(you)質的(de)服務，不斷地受到新老用(yong)戶及業(ye)內人士的(de)肯定和信任，我們(men)(men)本著及用(yong)戶之所(suo)及，想用(yong)戶之所(suo)想的(de)服務宗旨(zhi)不斷地拼搏，進取，在此對多年來支(zhi)持我們(men)(men)的(de)各行各業(ye)的(de)新老朋友表示由衷的(de)感謝，愿(yuan)我們(men)(men)今后的(de)合(he)作更加愉快！