公(gong)司主營：筒類鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)，異型鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)，不銹鋼鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)，筒類鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)加(jia)(jia)工(gong)(gong)，碳(tan)鋼鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)，合金鋼鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)，304鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)造，316鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)，316L鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)，軸鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)，非標件(jian)(jian)(jian)(jian)(jian)(jian)鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)加(jia)(jia)工(gong)(gong)，環鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)加(jia)(jia)工(gong)(gong)，大口徑法(fa)(fa)蘭，對焊法(fa)(fa)蘭，筒類鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)加(jia)(jia)工(gong)(gong)定制，法(fa)(fa)蘭環鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)等，歡迎來電咨詢！筒類鍛(duan)(duan)(duan)(duan)(duan)(duan)(duan)件(jian)(jian)(jian)(jian)(jian)(jian)加(jia)(jia)工(gong)(gong)

以下內(nei)容(rong)由本公司為(wei)您提供，今天我們(men)來分享筒類鍛(duan)件加工的(de)內(nei)容(rong)，希望(wang)對大(da)家有所幫助：

不銹鋼鍛件出現裂紋缺陷(xian)的原因？

表面裂(lie)(lie)紋(wen)(wen)是(shi)因(yin)鍛造溫度(du)過(guo)高或錘(chui)擊速度(du)過(guo)快(kuai)，筒類鍛件加(jia)工費用，使坯料發生過(guo)燒或過(guo)熱而引起的，裂(lie)(lie)口(kou)較(jiao)寬，斷口(kou)凹凸不平，組織粗大呈(cheng)(cheng)暗灰色。低倍(bei)組織中裂(lie)(lie)紋(wen)(wen)端為鋸(ju)齒形，與流線無關。高倍(bei)觀(guan)察裂(lie)(lie)紋(wen)(wen)沿(yan)晶界伸展，再(zai)結晶完全，無夾雜及其他冶(ye)金缺陷。鍛造溫度(du)過(guo)低，錘(chui)擊過(guo)重時，在坯料側(ce)表面與錘(chui)擊方向呈(cheng)(cheng)三角形裂(lie)(lie)紋(wen)(wen)，斷口(kou)平齊有金屬(shu)光澤。高倍(bei)觀(guan)察，裂(lie)(lie)紋(wen)(wen)穿晶并有加(jia)工硬化現象。

內部(bu)裂(lie)紋(wen)(wen)(wen)(wen)一(yi)種是在(zai)(zai)自(zi)由(you)鍛時(shi)(shi)(shi)發生的(de)(de)(de)。在(zai)(zai)圓截(jie)面(mian)坯料拔長(chang)、滾圓時(shi)(shi)(shi)，由(you)于送進量(liang)太(tai)大(da)(da)，壓下量(liang)太(tai)小，金屬(shu)橫向(xiang)流(liu)動激烈而產生橫向(xiang)拉應(ying)力，愈接近心部(bu)拉應(ying)力愈大(da)(da)，引(yin)起內部(bu)縱向(xiang)裂(lie)紋(wen)(wen)(wen)(wen)。另一(yi)種內部(bu)裂(lie)紋(wen)(wen)(wen)(wen)則(ze)是由(you)合金內部(bu)過分粗(cu)大(da)(da)的(de)(de)(de)金屬(shu)間化合物或(huo)夾雜物在(zai)(zai)鍛造(zao)時(shi)(shi)(shi)阻礙著金屬(shu)的(de)(de)(de)規則(ze)流(liu)動，在(zai)(zai)其周圍引(yin)起的(de)(de)(de)微(wei)裂(lie)紋(wen)(wen)(wen)(wen)。通常此種裂(lie)紋(wen)(wen)(wen)(wen)都要(yao)在(zai)(zai)不(bu)銹(xiu)鋼鍛件加工(gong)后才能表露出來。前一(yi)種縱向(xiang)裂(lie)紋(wen)(wen)(wen)(wen)的(de)(de)(de)防(fang)止方(fang)(fang)法是在(zai)(zai)圓坯料拔長(chang)時(shi)(shi)(shi)，先(xian)打四方(fang)(fang)后打八方(fang)(fang)后滾圓，每次壓下量(liang)要(yao)大(da)(da)于20%。后一(yi)種裂(lie)紋(wen)(wen)(wen)(wen)的(de)(de)(de)防(fang)止方(fang)(fang)法是要(yao)對鍛造(zao)毛坯嚴格檢查，控(kong)制(zhi)組織不(bu)合格的(de)(de)(de)坯料進入車問。

以上就是(shi)關于(yu)筒類鍛件加工的分(fen)享，希望能給(gei)大(da)家提(ti)供到幫助，了解(jie)更多關于(yu)筒類鍛件加工的問(wen)題歡迎來(lai)電(dian)咨詢，如您需要，竭誠為您服務(wu)。

公(gong)司(si)主營：筒(tong)類鍛(duan)(duan)(duan)件(jian)(jian)(jian)，異型(xing)鍛(duan)(duan)(duan)件(jian)(jian)(jian)，不(bu)銹鋼鍛(duan)(duan)(duan)件(jian)(jian)(jian)，筒(tong)類鍛(duan)(duan)(duan)件(jian)(jian)(jian)加工(gong)(gong)(gong)，碳鋼鍛(duan)(duan)(duan)件(jian)(jian)(jian)，合金鋼鍛(duan)(duan)(duan)件(jian)(jian)(jian)，304鍛(duan)(duan)(duan)件(jian)(jian)(jian)鍛(duan)(duan)(duan)造(zao)，316鍛(duan)(duan)(duan)件(jian)(jian)(jian)，316L鍛(duan)(duan)(duan)件(jian)(jian)(jian)，軸鍛(duan)(duan)(duan)件(jian)(jian)(jian)，非標件(jian)(jian)(jian)鍛(duan)(duan)(duan)件(jian)(jian)(jian)加工(gong)(gong)(gong)，環(huan)鍛(duan)(duan)(duan)件(jian)(jian)(jian)加工(gong)(gong)(gong)，大口徑(jing)法(fa)蘭(lan)，對焊法(fa)蘭(lan)，法(fa)蘭(lan)環(huan)鍛(duan)(duan)(duan)件(jian)(jian)(jian)等，歡迎來電咨詢！筒(tong)類鍛(duan)(duan)(duan)件(jian)(jian)(jian)加工(gong)(gong)(gong)

以(yi)下內(nei)容(rong)由本(ben)公司(si)為您提供(gong)，今(jin)天(tian)我們來(lai)分享筒類鍛件加工的內(nei)容(rong)，希望(wang)對大家有(you)所幫助：

自(zi)由鍛(duan)件的缺陷有哪些？

自由鍛件(jian)的缺陷(xian)有氧化、脫碳、過熱、過燒和(he)裂紋(wen)。

氧化(hua)：金屬(shu)坯(pi)料在加熱時(shi)與爐中氧化(hua)性氣(qi)體反(fan)應生成(cheng)氧化(hua)物的(de)現象稱(cheng)為氧化(hua)。氧化(hua)皮的(de)產(chan)生，不但造成(cheng)金屬(shu)的(de)燒損，筒類鍛(duan)件加工(gong)廠家，而且降低鍛(duan)件表面質量(liang)和(he)尺寸(cun)精度。當氧化(hua)皮壓(ya)入(ru)鍛(duan)件內(nei)深度超過機械加工(gong)余量(liang)時(shi)，能(neng)導致鍛(duan)件報廢(fei)。

脫碳(tan)(tan)(tan)(tan)：加熱(re)時金屬(shu)坯(pi)(pi)料表(biao)(biao)層(ceng)(ceng)的碳(tan)(tan)(tan)(tan)與氧等介(jie)(jie)質發生化(hua)學反應造成表(biao)(biao)層(ceng)(ceng)碳(tan)(tan)(tan)(tan)元(yuan)素降(jiang)低(di)的現象稱為脫碳(tan)(tan)(tan)(tan)。脫碳(tan)(tan)(tan)(tan)會使表(biao)(biao)層(ceng)(ceng)硬度下降(jiang)，耐(nai)磨(mo)性(xing)降(jiang)低(di)。如脫碳(tan)(tan)(tan)(tan)層(ceng)(ceng)厚度小于機械加工(gong)余量，不會對(dui)鍛件造成危害；反之則影響鍛件質量。采用(yong)快速加熱(re)、在坯(pi)(pi)料表(biao)(biao)層(ceng)(ceng)涂(tu)保護涂(tu)料、在中性(xing)介(jie)(jie)質或還原(yuan)性(xing)介(jie)(jie)性(xing)中加熱(re)都(dou)能(neng)減緩脫碳(tan)(tan)(tan)(tan)。

過熱：金屬坯料(liao)由加(jia)熱溫(wen)(wen)度(du)過高或高溫(wen)(wen)下保溫(wen)(wen)時(shi)(shi)間太長引起晶粒粗大的(de)現象(xiang)稱為(wei)過熱。過熱會使坯料(liao)塑(su)性(xing)下降(jiang)，鍛件的(de)力(li)學(xue)性(xing)能降(jiang)低(di)。為(wei)此，要嚴格控制(zhi)加(jia)熱溫(wen)(wen)度(du)，盡可(ke)能縮短(duan)高溫(wen)(wen)階段(duan)的(de)保溫(wen)(wen)時(shi)(shi)間來(lai)預防過熱的(de)產生。

過(guo)(guo)燒(shao)：金(jin)屬坯料(liao)加熱溫(wen)度超過(guo)(guo)始鍛(duan)溫(wen)度過(guo)(guo)多(duo)，使(shi)晶粒邊(bian)界(jie)出現氧化(hua)及熔(rong)化(hua)的(de)(de)現象(xiang)稱為(wei)過(guo)(guo)燒(shao)。過(guo)(guo)燒(shao)后，材料(liao)的(de)(de)強(qiang)度嚴(yan)(yan)重(zhong)下降，塑(su)性很差，一經(jing)鍛(duan)打即(ji)破碎變成廢料(liao)，是無法挽救的(de)(de)。因此，要嚴(yan)(yan)格執行(xing)正確的(de)(de)操作規(gui)范。

裂(lie)紋：大(da)(da)型鍛件加(jia)熱(re)(re)時，如(ru)果(guo)裝爐溫(wen)度(du)(du)過(guo)(guo)高或加(jia)熱(re)(re)速度(du)(du)過(guo)(guo)快(kuai)，則鍛件心(xin)部與表層(ceng)溫(wen)差過(guo)(guo)大(da)(da)，造成(cheng)內應(ying)力過(guo)(guo)大(da)(da)，導致產(chan)生(sheng)裂(lie)紋。因此(ci)，對大(da)(da)型鍛件加(jia)熱(re)(re)時，要(yao)防止裝爐溫(wen)度(du)(du)過(guo)(guo)高和加(jia)熱(re)(re)速度(du)(du)過(guo)(guo)快(kuai)，一般應(ying)采用防熱(re)(re)措施。

如果大家有什么疑問或者想要了解更多筒類鍛件加工資訊，歡迎大家給小編來電或者留言！

公司主營：筒類鍛(duan)(duan)件(jian)(jian)(jian)，異型鍛(duan)(duan)件(jian)(jian)(jian)，不銹鋼(gang)鍛(duan)(duan)件(jian)(jian)(jian)，筒類鍛(duan)(duan)件(jian)(jian)(jian)加(jia)工，碳鋼(gang)鍛(duan)(duan)件(jian)(jian)(jian)，合(he)金鋼(gang)鍛(duan)(duan)件(jian)(jian)(jian)，304鍛(duan)(duan)件(jian)(jian)(jian)鍛(duan)(duan)造，316鍛(duan)(duan)件(jian)(jian)(jian)，316L鍛(duan)(duan)件(jian)(jian)(jian)，廣東筒類鍛(duan)(duan)件(jian)(jian)(jian)加(jia)工，軸(zhou)鍛(duan)(duan)件(jian)(jian)(jian)，非標件(jian)(jian)(jian)鍛(duan)(duan)件(jian)(jian)(jian)加(jia)工，環鍛(duan)(duan)件(jian)(jian)(jian)加(jia)工，大口(kou)徑法蘭，對焊法蘭，法蘭環鍛(duan)(duan)件(jian)(jian)(jian)等，歡(huan)迎來(lai)電(dian)咨詢！筒類鍛(duan)(duan)件(jian)(jian)(jian)加(jia)工

以下(xia)內(nei)容(rong)由本公司為您提供(gong)，今(jin)天我(wo)們來分享筒類鍛(duan)件加工的(de)內(nei)容(rong)，希望對大(da)家有所(suo)幫助：

鍛(duan)件(jian)常用的冷卻方法：

鍛(duan)件的冷(leng)卻(que)(que)是指(zhi)鍛(duan)件從(cong)終鍛(duan)溫(wen)度(du)至(zhi)室(shi)溫(wen)的冷(leng)卻(que)(que)。冷(leng)卻(que)(que)方(fang)式選擇(ze)(ze)不當，可能由于應力過大(da)產(chan)生裂紋、網狀碳化物和白點而影響產(chan)品質量，甚(shen)至(zhi)使鍛(duan)件報廢。所以我們對待(dai)不同(tong)的鍛(duan)件要選擇(ze)(ze)相應的冷(leng)卻(que)(que)方(fang)法(fa)，接下(xia)來是鍛(duan)件的幾種(zhong)冷(leng)卻(que)(que)方(fang)法(fa)。

噴霧(wu)冷(leng)卻。利用(yong)風(feng)機的風(feng)把(ba)從(cong)水管流出的水霧(wu)化(hua)后(hou)吹到(dao)鍛件上(shang)進行冷(leng)卻。

風冷。鍛件用吹(chui)風冷卻。

空(kong)冷。鍛(duan)件均勻(yun)地(di)(di)擺在(zai)(zai)地(di)(di)面上在(zai)(zai)靜止(zhi)的空(kong)氣中冷卻(que)。注(zhu)意不(bu)要放(fang)在(zai)(zai)潮濕的地(di)(di)上或(huo)金屬板上，也不(bu)要放(fang)在(zai)(zai)有穿堂(tang)風的地(di)(di)方，以(yi)防止(zhi)鍛(duan)件局部冷卻(que)過快(kuai)引起缺陷(xian)。

如果大家有什么疑問或者想要了解更多筒類鍛件加工資訊，歡迎大家給小編來電或者留言！