實(shi)際熱(re)(re)成(cheng)(cheng)形(xing)(xing)工(gong)藝首先(xian)(xian)把常溫(wen)下(xia)強度(du)為500~600 MPa的(de)高(gao)強度(du)硼(peng)合(he)金鋼板(ban)加熱(re)(re)到880~950℃，使(shi)之均(jun)勻(yun)奧(ao)氏體化，然后(hou)送入內部帶(dai)有(you)冷卻(que)(que)系(xi)統的(de)模具內沖(chong)(chong)壓(ya)(ya)成(cheng)(cheng)形(xing)(xing)，之后(hou)保壓(ya)(ya)快速(su)冷卻(que)(que)淬(cui)火，使(shi)奧(ao)氏體轉變(bian)成(cheng)(cheng)馬(ma)氏體，成(cheng)(cheng)形(xing)(xing)件因而(er)得(de)到強化硬化，強度(du)大(da)幅(fu)度(du)提高(gao)。比如經過模具內的(de)冷卻(que)(que)淬(cui)火，沖(chong)(chong)壓(ya)(ya)件強度(du)可以(yi)達到1500 MPa，強度(du)提高(gao)了(le)250%以(yi)上，因此該項技術又(you)被稱為“沖(chong)(chong)壓(ya)(ya)硬化”技術。實(shi)際生產中(zhong)，熱(re)(re)沖(chong)(chong)壓(ya)(ya)工(gong)藝又(you)分為兩(liang)種，即(ji)直接(jie)工(gong)藝和間接(jie)工(gong)藝。下(xia)料后(hou)，直接(jie)把鋼板(ban)加熱(re)(re)然后(hou)沖(chong)(chong)壓(ya)(ya)成(cheng)(cheng)形(xing)(xing)，主要用(yong)于形(xing)(xing)狀比較(jiao)簡單變(bian)形(xing)(xing)程度(du)不大(da)的(de)工(gong)件。對于一些形(xing)(xing)狀復雜的(de)或者拉深(shen)(shen)深(shen)(shen)度(du)較(jiao)大(da)的(de)工(gong)件，則(ze)需要采用(yong)間接(jie)工(gong)藝，先(xian)(xian)把下(xia)好料的(de)鋼板(ban)預變(bian)形(xing)(xing)，然后(hou)再加熱(re)(re)實(shi)施熱(re)(re)沖(chong)(chong)壓(ya)(ya)。對高(gao)強度(du)鋼板(ban)的(de)熱(re)(re)成(cheng)(cheng)形(xing)(xing)技術，我們需要重點關注的(de)是用(yong)鋼選擇(ze)、熱(re)(re)成(cheng)(cheng)形(xing)(xing)用(yong)鋼的(de)表面鍍層、模具設(she)計(ji)和熱(re)(re)成(cheng)(cheng)形(xing)(xing)零件的(de)檢(jian)測問題。

　　熱(re)(re)(re)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)用(yong)鋼(gang)(gang)(gang)的(de)(de)(de)(de)(de)選擇是保(bao)證熱(re)(re)(re)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)零件性(xing)(xing)能的(de)(de)(de)(de)(de)重要一環。高強度(du)鋼(gang)(gang)(gang)板(ban)的(de)(de)(de)(de)(de)熱(re)(re)(re)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)性(xing)(xing)主要分包(bao)括(kuo)以下形(xing)(xing)(xing)式：深沖成(cheng)(cheng)(cheng)形(xing)(xing)(xing)性(xing)(xing)、脹形(xing)(xing)(xing)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)性(xing)(xing)以及延(yan)(yan)伸(shen)(shen)凸(tu)緣成(cheng)(cheng)(cheng)形(xing)(xing)(xing)性(xing)(xing)等。一般認(ren)為(wei)：深沖成(cheng)(cheng)(cheng)形(xing)(xing)(xing)性(xing)(xing)取(qu)(qu)決于(yu)鋼(gang)(gang)(gang)板(ban)塑性(xing)(xing)應變(bian)化(hua)的(de)(de)(de)(de)(de)Lankford值；脹形(xing)(xing)(xing)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)性(xing)(xing)取(qu)(qu)決于(yu)鋼(gang)(gang)(gang)板(ban)的(de)(de)(de)(de)(de)延(yan)(yan)性(xing)(xing)；而(er)延(yan)(yan)伸(shen)(shen)凸(tu)緣成(cheng)(cheng)(cheng)形(xing)(xing)(xing)性(xing)(xing)取(qu)(qu)決于(yu)鋼(gang)(gang)(gang)板(ban)的(de)(de)(de)(de)(de)局部(bu)(bu)變(bian)形(xing)(xing)(xing)能和(he)顯微組(zu)(zu)織(zhi)(zhi)均(jun)勻性(xing)(xing)。B在(zai)支配延(yan)(yan)伸(shen)(shen)凸(tu)緣成(cheng)(cheng)(cheng)形(xing)(xing)(xing)性(xing)(xing)和(he)彎(wan)曲成(cheng)(cheng)(cheng)形(xing)(xing)(xing)性(xing)(xing)的(de)(de)(de)(de)(de)顯微組(zu)(zu)織(zhi)(zhi)均(jun)勻化(hua)方面(mian)起(qi)到(dao)了重要作用(yong)，故一直采(cai)用(yong)F+B和(he)B單(dan)一組(zu)(zu)織(zhi)(zhi)；而(er)且(qie)為(wei)了實現高強度(du)化(hua)目(mu)標(biao)，也采(cai)用(yong)了低碳M。馬(ma)氏(shi)體鋼(gang)(gang)(gang)中的(de)(de)(de)(de)(de)22MnB5鋼(gang)(gang)(gang)的(de)(de)(de)(de)(de)原理與此相(xiang)符，是典型(xing)的(de)(de)(de)(de)(de)熱(re)(re)(re)沖壓(ya)材料鋼(gang)(gang)(gang)，它利用(yong)鈦和(he)硼微合金化(hua)的(de)(de)(de)(de)(de)方法，通過熱(re)(re)(re)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)后急(ji)冷(leng)獲得高的(de)(de)(de)(de)(de)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)度(du)和(he)極高的(de)(de)(de)(de)(de)強度(du)。目(mu)前，熱(re)(re)(re)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)MnB鋼(gang)(gang)(gang)板(ban)在(zai)歐(ou)美和(he)日本主要汽車制造企業已經開始(shi)使用(yong)，如(ru)新(xin)型(xing)Golf V6車有(you)5個零部(bu)(bu)件用(yong)MnB鋼(gang)(gang)(gang)制成(cheng)(cheng)(cheng)，最新(xin)的(de)(de)(de)(de)(de)第(di)六代PASSAT車型(xing)有(you)9個這樣(yang)的(de)(de)(de)(de)(de)部(bu)(bu)件。圖5是寶鋼(gang)(gang)(gang)開發的(de)(de)(de)(de)(de)熱(re)(re)(re)沖壓(ya)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)用(yong)含(han)硼鋼(gang)(gang)(gang)的(de)(de)(de)(de)(de)CCT(連續(xu)冷(leng)卻相(xiang)變(bian))曲線，經過 950℃左右單(dan)相(xiang)奧氏(shi)體區(qu)的(de)(de)(de)(de)(de)加熱(re)(re)(re)保(bao)溫(wen)后，當冷(leng)卻速度(du)大于(yu)15℃/s后，鋼(gang)(gang)(gang)板(ban)的(de)(de)(de)(de)(de)組(zu)(zu)織(zhi)(zhi)轉變(bian)為(wei)全馬(ma)氏(shi)體組(zu)(zu)織(zhi)(zhi)，其硬度(du)為(wei)HV450～500，強度(du)達到(dao)1300—1500MPa。

　　熱(re)成(cheng)(cheng)形零件(jian)具有的壓(ya)潰性(xing)(xing)(xing)(xing)能(碰撞后的低的侵入)決定了其很適合用于(yu)安全(quan)件(jian)。熱(re)成(cheng)(cheng)形零件(jian)的加工通常需要(yao)經過激光切(qie)割、沖(chong)裁孔、點(dian)焊(han)、冷成(cheng)(cheng)形、裝(zhuang)配(pei)以(yi)及(ji)油漆等(deng)工序，因此對(dui)熱(re)成(cheng)(cheng)形零件(jian)需要(yao)檢測(ce)(ce)的內(nei)容很多。首(shou)先是要(yao)對(dui)熱(re)成(cheng)(cheng)形零件(jian)進行力(li)學性(xing)(xing)(xing)(xing)能檢測(ce)(ce)、形狀檢測(ce)(ce)、厚(hou)度(du)分布檢測(ce)(ce)和引入的內(nei)應(ying)力(li)檢測(ce)(ce)，還(huan)要(yao)根(gen)據不(bu)同零件(jian)的不(bu)同要(yao)求(qiu)，采用不(bu)同的方法(fa)進行實物性(xing)(xing)(xing)(xing)能檢測(ce)(ce)。對(dui)于(yu)一(yi)個合格的熱(re)成(cheng)(cheng)形零件(jian)，應(ying)當(dang)滿足高強(qiang)度(du)、輕量化和安全(quan)性(xing)(xing)(xing)(xing)的要(yao)求(qiu)，同時還(huan)應(ying)具備好的強(qiang)度(du)與(yu)韌(ren)性(xing)(xing)(xing)(xing)結合性(xing)(xing)(xing)(xing)、尺寸穩(wen)(wen)定性(xing)(xing)(xing)(xing)、可(ke)加工性(xing)(xing)(xing)(xing)(幾何尺寸穩(wen)(wen)定性(xing)(xing)(xing)(xing))、可(ke)焊(han)性(xing)(xing)(xing)(xing)以(yi)及(ji)疲勞抗力(li)等(deng)。

耐磨板|耐磨板廠家價格| 耐磨鋼板現貨——法鋼特種鋼材（上海）有限公司
//zenggaole.cn
主要經營：JFE 耐磨鋼板，JFE 高強鋼板，DILLIDUR 耐磨鋼板，DILLIMAX 高強鋼板