TC4鈦鍛件(jian)(jian)缺(que)陷(xian)的(de)(de)存在(zai)，有(you)的(de)(de)會(hui)影(ying)(ying)響后(hou)續(xu)(xu)工(gong)序處理質量(liang)(liang)或加工(gong)質量(liang)(liang)，有(you)的(de)(de)則嚴重影(ying)(ying)響鈦鍛件(jian)(jian)、鈦合金鍛件(jian)(jian)的(de)(de)性能及(ji)使(shi)用(yong)，甚(shen)至極大地(di)降低所制成品件(jian)(jian)的(de)(de)使(shi)用(yong)壽(shou)命，危及(ji)安(an)全(quan)。因(yin)此為(wei)了(le)保證或提(ti)高鈦鍛件(jian)(jian)的(de)(de)質量(liang)(liang)，除在(zai)工(gong)藝上加強質量(liang)(liang)控制，采取相(xiang)應(ying)措(cuo)施(shi)杜絕鈦鍛件(jian)(jian)缺(que)陷(xian)的(de)(de)產生外，還應(ying)進行必要(yao)的(de)(de)質量(liang)(liang)檢驗(yan)，防(fang)止(zhi)帶有(you)對(dui)后(hou)續(xu)(xu)工(gong)序（如(ru)熱處理、表面處理、冷加工(gong)）及(ji)使(shi)用(yong)性能有(you)惡劣影(ying)(ying)響的(de)(de)缺(que)陷(xian)的(de)(de)鈦鍛件(jian)(jian)流人后(hou)續(xu)(xu)工(gong)序。經質量(liang)(liang)檢驗(yan)后(hou)，還可以根據缺(que)陷(xian)的(de)(de)性質及(ji)影(ying)(ying)響使(shi)用(yong)的(de)(de)程度對(dui)已制鈦鍛件(jian)(jian)采取補救(jiu)措(cuo)施(shi)，使(shi)之(zhi)符合技(ji)術標準或使(shi)用(yong)的(de)(de)要(yao)求。

因此，鈦(tai)鍛(duan)(duan)(duan)件(jian)(jian)質(zhi)(zhi)(zhi)量(liang)(liang)(liang)檢驗(yan)從某(mou)種意(yi)義上(shang)講，一方(fang)面是(shi)(shi)對已制鈦(tai)鍛(duan)(duan)(duan)件(jian)(jian)的(de)(de)(de)(de)(de)質(zhi)(zhi)(zhi)量(liang)(liang)(liang)把關，另一方(fang)面則是(shi)(shi)給鍛(duan)(duan)(duan)造工(gong)藝指(zhi)出改進方(fang)向，從而(er)保證鈦(tai)鍛(duan)(duan)(duan)件(jian)(jian)質(zhi)(zhi)(zhi)量(liang)(liang)(liang)符合鈦(tai)鍛(duan)(duan)(duan)件(jian)(jian)技(ji)術(shu)標準的(de)(de)(de)(de)(de)要求，并滿(man)足設計、加工(gong)、使用上(shang)的(de)(de)(de)(de)(de)要求。鈦(tai)鍛(duan)(duan)(duan)件(jian)(jian)質(zhi)(zhi)(zhi)量(liang)(liang)(liang)的(de)(de)(de)(de)(de)檢驗(yan)包括(kuo)外觀質(zhi)(zhi)(zhi)量(liang)(liang)(liang)及內部質(zhi)(zhi)(zhi)量(liang)(liang)(liang)的(de)(de)(de)(de)(de)檢驗(yan)。外觀質(zhi)(zhi)(zhi)量(liang)(liang)(liang)檢驗(yan)主要指(zhi)鈦(tai)鍛(duan)(duan)(duan)件(jian)(jian)的(de)(de)(de)(de)(de)幾何(he)尺(chi)寸、形狀、表面狀況等項目的(de)(de)(de)(de)(de)檢驗(yan)；內部質(zhi)(zhi)(zhi)量(liang)(liang)(liang)的(de)(de)(de)(de)(de)檢驗(yan)則主要是(shi)(shi)指(zhi)鈦(tai)鍛(duan)(duan)(duan)件(jian)(jian)化(hua)學成分、宏觀組(zu)織、鈦(tai)鍛(duan)(duan)(duan)件(jian)(jian)顯微組(zu)織及力(li)學性能等各項目的(de)(de)(de)(de)(de)檢驗(yan)。

具體說來(lai)，鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)(duan)件(jian)(jian)(jian)的外觀質(zhi)量(liang)檢(jian)(jian)(jian)(jian)(jian)驗(yan)也就(jiu)是(shi)(shi)(shi)檢(jian)(jian)(jian)(jian)(jian)查(cha)(cha)(cha)鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)(duan)件(jian)(jian)(jian)的形狀(zhuang)、幾何尺寸是(shi)(shi)(shi)否(fou)符合圖樣的規(gui)定，鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)(duan)件(jian)(jian)(jian)的表面(mian)(mian)是(shi)(shi)(shi)否(fou)有缺(que)(que)陷(xian)(xian)，是(shi)(shi)(shi)什(shen)么性(xing)(xing)(xing)質(zhi)的缺(que)(que)陷(xian)(xian)，它們(men)的形態(tai)特征是(shi)(shi)(shi)什(shen)么。表面(mian)(mian)狀(zhuang)態(tai)的檢(jian)(jian)(jian)(jian)(jian)驗(yan)內(nei)容一般是(shi)(shi)(shi)檢(jian)(jian)(jian)(jian)(jian)查(cha)(cha)(cha)鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)(duan)件(jian)(jian)(jian)表面(mian)(mian)是(shi)(shi)(shi)否(fou)有表面(mian)(mian)裂紋、折(zhe)疊、折(zhe)皺、壓坑(keng)、桔皮(pi)、起泡、斑疤、腐(fu)蝕坑(keng)、碰傷、外來(lai)物(wu)、未(wei)充滿(man)、凹坑(keng)、缺(que)(que)肉、劃(hua)痕(hen)等(deng)缺(que)(que)陷(xian)(xian)。而(er)內(nei)部(bu)質(zhi)量(liang)的檢(jian)(jian)(jian)(jian)(jian)驗(yan)就(jiu)是(shi)(shi)(shi)檢(jian)(jian)(jian)(jian)(jian)查(cha)(cha)(cha)鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)(duan)件(jian)(jian)(jian)本身的內(nei)在質(zhi)量(liang)，是(shi)(shi)(shi)外觀質(zhi)量(liang)檢(jian)(jian)(jian)(jian)(jian)查(cha)(cha)(cha)無法發現的質(zhi)量(liang)狀(zhuang)況，它既包含檢(jian)(jian)(jian)(jian)(jian)查(cha)(cha)(cha)鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)(duan)件(jian)(jian)(jian)的內(nei)部(bu)缺(que)(que)陷(xian)(xian)，也包含檢(jian)(jian)(jian)(jian)(jian)查(cha)(cha)(cha)鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)(duan)件(jian)(jian)(jian)的力學性(xing)(xing)(xing)能(neng)，而(er)對(dui)(dui)(dui)重要件(jian)(jian)(jian)、關鍵件(jian)(jian)(jian)或大(da)型鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)(duan)件(jian)(jian)(jian)還應(ying)進行化學成分(fen)(fen)分(fen)(fen)析(xi)。對(dui)(dui)(dui)于內(nei)部(bu)缺(que)(que)陷(xian)(xian)我們(men)將通過低(di)倍檢(jian)(jian)(jian)(jian)(jian)查(cha)(cha)(cha)、斷口檢(jian)(jian)(jian)(jian)(jian)查(cha)(cha)(cha)、高倍檢(jian)(jian)(jian)(jian)(jian)查(cha)(cha)(cha)的方法來(lai)檢(jian)(jian)(jian)(jian)(jian)驗(yan)鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)(duan)件(jian)(jian)(jian)是(shi)(shi)(shi)否(fou)存在諸(zhu)如內(nei)裂、縮孔、疏松、粗晶(jing)、白點、樹枝狀(zhuang)結晶(jing)、流線不符合外形、流線紊(wen)亂、穿(chuan)流、粗晶(jing)環、氧化膜、分(fen)(fen)層、過熱、過燒(shao)組(zu)織(zhi)等(deng)缺(que)(que)陷(xian)(xian)。而(er)對(dui)(dui)(dui)于力學性(xing)(xing)(xing)能(neng)主要是(shi)(shi)(shi)檢(jian)(jian)(jian)(jian)(jian)查(cha)(cha)(cha)常溫(wen)抗拉強度(du)、塑(su)性(xing)(xing)(xing)、韌性(xing)(xing)(xing)、硬度(du)、疲勞強度(du)、高溫(wen)瞬時斷裂強度(du)、高溫(wen)持(chi)久(jiu)強度(du)、持(chi)久(jiu)塑(su)性(xing)(xing)(xing)及高溫(wen)蠕(ru)變(bian)強度(du)等(deng)。

由于鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)件(jian)制成零(ling)件(jian)后，在使用(yong)過程中其受力情況、重(zhong)要程度、工作條件(jian)不(bu)(bu)(bu)同(tong)(tong)(tong)，其所用(yong)材(cai)料和冶金(jin)工藝(yi)也(ye)不(bu)(bu)(bu)同(tong)(tong)(tong)，因此不(bu)(bu)(bu)同(tong)(tong)(tong)的(de)(de)(de)部位依據上述情況并(bing)按照本部門的(de)(de)(de)要求將(jiang)(jiang)鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)件(jian)分出類(lei)(lei)別(bie)，不(bu)(bu)(bu)同(tong)(tong)(tong)的(de)(de)(de)部門，不(bu)(bu)(bu)同(tong)(tong)(tong)的(de)(de)(de)標準對鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)件(jian)的(de)(de)(de)分類(lei)(lei)也(ye)是不(bu)(bu)(bu)同(tong)(tong)(tong)的(de)(de)(de)。但(dan)不(bu)(bu)(bu)管怎么(me)，對于鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)件(jian)質量檢(jian)驗(yan)(yan)(yan)(yan)的(de)(de)(de)整(zheng)體(ti)來說都離(li)不(bu)(bu)(bu)開兩大類(lei)(lei)檢(jian)驗(yan)(yan)(yan)(yan)，即(ji)外觀質量和內部質量的(de)(de)(de)檢(jian)驗(yan)(yan)(yan)(yan)，只不(bu)(bu)(bu)過鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)件(jian)的(de)(de)(de)類(lei)(lei)別(bie)不(bu)(bu)(bu)同(tong)(tong)(tong)，其具(ju)體(ti)的(de)(de)(de)檢(jian)驗(yan)(yan)(yan)(yan)項目(mu)、檢(jian)驗(yan)(yan)(yan)(yan)數量和檢(jian)驗(yan)(yan)(yan)(yan)要求不(bu)(bu)(bu)同(tong)(tong)(tong)罷(ba)了(le)。例如，有的(de)(de)(de)工業部門將(jiang)(jiang)結構鋼、不(bu)(bu)(bu)銹鋼、耐熱(re)鋼鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)件(jian)分成Ⅳ類(lei)(lei)進行檢(jian)驗(yan)(yan)(yan)(yan)，有的(de)(de)(de)部門將(jiang)(jiang)鋁合金(jin)鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)件(jian)與(yu)模鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)件(jian)按其使用(yong)情況分成Ⅲ類(lei)(lei)進行檢(jian)驗(yan)(yan)(yan)(yan)，還有的(de)(de)(de)部門將(jiang)(jiang)鋁合金(jin)、銅合金(jin)鈦(tai)(tai)(tai)鍛(duan)(duan)(duan)件(jian)分成Ⅳ類(lei)(lei)進行檢(jian)驗(yan)(yan)(yan)(yan)。