NEWS
為保證不銹(xiu)(xiu)鋼無縫管整(zheng)個(ge)圓(yuan)柱范圍內的缺(que)陷檢(jian)(jian)測，需要不銹(xiu)(xiu)鋼管與探頭之間做相對螺旋運動。探頭靜止不動，不銹(xiu)(xiu)鋼無縫鋼管螺旋前進(jin)是(shi)相對較為簡(jian)單(dan)(dan)的檢(jian)(jian)測方式(shi)，該檢(jian)(jian)測機構(gou)(gou)在(zai)國內出現的歷史較長，優勢與劣(lie)勢都非常明顯(xian)。主要優點在(zai)于設備結構(gou)(gou)簡(jian)單(dan)(dan)，成本(ben)較低，缺(que)點在(zai)于檢(jian)(jian)測速度較慢，通(tong)常情況下...
不銹鋼(gang)管進行超聲(sheng)波探傷(shang)前需要做一些準備(bei)工作，首先根(gen)據待(dai)測(ce)件(jian)結(jie)構(gou)、檢(jian)測(ce)要求、現場(chang)條件(jian)等因素來選擇儀器、探頭(tou)、試塊，然后調節儀器并(bing)確(que)定(ding)檢(jian)測(ce)靈敏(min)度，測(ce)定(ding)表面耦合(he)損耗與補償，選定(ding)耦合(he)劑、掃查方式，之后才可以開始對待(dai)測(ce)件(jian)進行缺陷(xian)的測(ce)定(ding)、記錄、等級評(ping)定(ding)，最后對儀器和探頭(tou)系統復核。...
不(bu)銹鋼最常用(yong)(yong)的(de)力學性(xing)能試(shi)(shi)(shi)驗(yan)(yan)有(you)硬(ying)(ying)度(du)(du)試(shi)(shi)(shi)驗(yan)(yan)、靜拉伸試(shi)(shi)(shi)驗(yan)(yan)和沖擊試(shi)(shi)(shi)驗(yan)(yan)。根據不(bu)銹鋼熱處理類型(xing)的(de)不(bu)同(tong)，經常采用(yong)(yong)的(de)有(you)布氏硬(ying)(ying)度(du)(du)試(shi)(shi)(shi)驗(yan)(yan)、洛氏硬(ying)(ying)度(du)(du)試(shi)(shi)(shi)驗(yan)(yan)、維氏硬(ying)(ying)度(du)(du)試(shi)(shi)(shi)驗(yan)(yan)等。1.布氏硬(ying)(ying)度(du)(du)試(shi)(shi)(shi)驗(yan)(yan)布氏硬(ying)(ying)度(du)(du)試(shi)(shi)(shi)驗(yan)(yan)是對一(yi)定直徑的(de)硬(ying)(ying)質合(he)金球（過去(qu)也(ye)常用(yong)(yong)鋼球）施加試(shi)(shi)(shi)驗(yan)(yan)力壓(ya)人試(shi)(shi)(shi)樣表面，經規定的(de)保持時(shi)間后，卸除試(shi)(shi)(shi)驗(yan)(yan)力，再測量試(shi)(shi)(shi)...
硝酸(suan)試驗(yan)是1930年首先由(you)Huey提(ti)出并(bing)經過后人(ren)不斷改進(jin)發展起來的(de)。因此，有時(shi)又把這一方法叫做Huey試驗(yan)。美國(guo)廣泛使用這一定(ding)量方法檢驗(yan)晶間(jian)腐蝕的(de)敏感性。硝酸(suan)腐蝕試驗(yan)的(de)機理目前還(huan)沒有完全弄清楚，它(ta)可能是由(you)下面幾種不同的(de)作用引起的(de)。 1.硝酸(suan)試驗(yan)是在氧化...
1926年(nian)Hatfeild曾采(cai)用硫(liu)酸－硫(liu)酸銅溶液試(shi)驗敏(min)化不銹鋼(gang)(gang)的晶間(jian)腐(fu)蝕。后來(lai)Strauss等人做(zuo)了(le)改進，最后發(fa)展成為一(yi)種常(chang)用的檢(jian)驗奧氏體不銹鋼(gang)(gang)晶間(jian)腐(fu)蝕的標準試(shi)驗方法。不銹鋼(gang)(gang)在(zai)硫(liu)酸－硫(liu)酸銅試(shi)驗中的腐(fu)蝕電(dian)位在(zai)＋0.3~+0.58V范圍內（相對于標準氫電(dian)極）。在(zai)這(zhe)一(yi)電(dian)...
金(jin)屬腐(fu)(fu)(fu)(fu)(fu)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)可分為全面(mian)腐(fu)(fu)(fu)(fu)(fu)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)和局部(bu)腐(fu)(fu)(fu)(fu)(fu)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)。局部(bu)腐(fu)(fu)(fu)(fu)(fu)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)主要包(bao)括晶間腐(fu)(fu)(fu)(fu)(fu)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)、縫隙腐(fu)(fu)(fu)(fu)(fu)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)、孔(kong)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)、應(ying)力腐(fu)(fu)(fu)(fu)(fu)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)開(kai)裂，選擇性(xing)腐(fu)(fu)(fu)(fu)(fu)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)等。不銹鋼和耐(nai)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)合(he)金(jin)雖(sui)然是以(yi)耐(nai)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)為目(mu)的(de)，但(dan)對(dui)于各(ge)種形式的(de)腐(fu)(fu)(fu)(fu)(fu)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)，不一定都具(ju)(ju)有優良的(de)耐(nai)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)性(xing)，不同材(cai)(cai)料對(dui)不同類型的(de)腐(fu)(fu)(fu)(fu)(fu)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)介質具(ju)(ju)有不同的(de)耐(nai)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)性(xing)。判斷材(cai)(cai)料耐(nai)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)性(xing)的(de)試驗(yan)方法，也按腐(fu)(fu)(fu)(fu)(fu)蝕(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)(shi)...
