坡口間的焊接殘余應(yīng)力

1、坡口間的焊接殘余應(yīng)力坡口間距對應(yīng)的影響也較為明顯，從表中可以看出，坡口間距越大，應(yīng)力值也有明顯的增大，最大間隙處應(yīng)力值（為最小間隙處應(yīng)力值的3.5倍左右）。從理論上分析，坡口越大，需填充的金屬越多，焊接時(shí)熱作用時(shí)間越長，溫度也越高，因而產(chǎn)生更大的應(yīng)力。Crespondingarerelativelyobvioustheinfluenceofgroovespacingcanbeseenfromthetablethegroovespacin

2、gthegreaterthestressvaluehadincreasedobviouslythebiggestgapinstressvalue(fminimumclearancestressvalueofabout3.5times).Theeticallyanalysisgroovethegreatertheneedtofillthememetalweldingthermaleffectwhenthelongerthetimetheh

3、igherthetemperaturethushaveagreaterstress.4.3坡口間距對機(jī)械性能的影響4.3groovespacingeffectonthemechanicalproperties了Q235B），土工格柵廠家這類材料的組織在加熱時(shí)，長大傾向并不明顯。可以認(rèn)為，坡口間距對焊接接頭及熱影響區(qū)金屬組織的影響是不大的?；蛘哒f，因焊接接頭及熱影響區(qū)金屬組織所引起的焊接接頭失效現(xiàn)象的因素要比焊接缺陷和應(yīng)力變化所產(chǎn)生的影響

4、小得多。Inthecrespondingthemostslopesendminimumgrooveendmouthsamplesweretakenfmetallographicanalysiscontrastmaterialmetallographicsmalldifferencesinganizationalchange.Visiblebecausethematerialsusedfdinarycarbonstructuralstee

5、l(tubeplatethecylindertheQ235materialionareB)theganizationofthiskindofmaterialwhenheatedgrewuptendencyisnotobvious.Canthinkgroovespacingontheinfluenceoftheweldheataffectedzonemetalgroupisnotbig.becauseoftheweldheataffect