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            [淮南導熱油換熱器]分析換熱器入口端開裂的微觀觀察特征

            發(fā)布時間:2021-09-10   

            [換][熱][器][焊][縫][的][斷][裂][在][微][觀][下][,][入][口][端][開][裂][主][要][為][脆][性][開][裂][特][征][,][裂][紋][起][裂][于][齒][形][板][的][尖][端][淮南導熱油換熱器,][裂][紋][沿][晶][開][裂][,][主][要][形][貌][特][征][為][解][理][沿][晶][二][次][開][裂][,][具][有][應][力][腐][蝕][開][裂][的][特][征][。][壓][緊][板][與][板][束][間][存][在][溫][差][,][若][溫][差][達]100e[,][則][在][壓][緊][板][上][所][產][生][的][溫][差][應][力][已][大][于]304[材][料][的][標][準][屈][服][強][度][。][此][外][,][原][結][構][管][板][厚][度][達]60mm[,][管][板][外][緣][受][殼][體][直][徑][的][限][制][。]

            [ ][ ][換][熱][器][入][口][端][齒][形][板][焊][縫][為][脆][性][斷][裂][,][主][要][形][貌][特][征][為][解][理][沿][晶][二][次][開][裂][,][有][應][力][腐][蝕][開][裂][特][征][。][出][口][端][齒][形][板][焊][縫][開][裂][主][要][為][韌][性][斷][裂][特][征][淮南導熱油換熱器,][是][因][出][口][端][焊][縫][承][受][了][較][大][的][焊][接][殘][余][應][力][和][熱][應][力][淮南導熱油換熱器,][受][介][質][中][高][質][量][分][數(shù)][氯][離][子][和][高][溫][作][用][,][發(fā)][生][了][氯][化][物][應][力][腐][蝕][開][裂][。]

            [ ][ ][改][進][措][施][:][(]1[)][斷][開][壓][緊][板][淮南導熱油換熱器,][絕][緣][梯][子][增][設][上][部][膨][脹][節(jié)][以][吸][收][板][束][與][壓][緊][板][之][間][的][膨][脹][差][。][取][消][管][板][結][構][,][在][板][束][上][部][增][設][與][板][束][下][部][相][同][的][拱][頂][蓋][,][極][大][地][降][低][了][板][片][寬][度][方][向][的][膨][脹][約][束][。]

            [ ][ ][(]2[)][將][梳][齒][板][更][新][為][鑲][塊][結][構][,][端][面][只][起][密][封][作][用][淮南導熱油換熱器,][長][度][(]60mm[)][方][向][與][板][片][的][焊][縫][受][力][一][致][,][使][承][載][能][力][大][為][提][高][。][板][束][質][量][由][新][設][置][的][管][板][承][受][,][管][板][由][設][備][法][蘭][夾][持][。][在][板][束][端][面][設][置][支][撐][橫][梁][。][裂][縫][處][理][縮][小][板][束][殼][程][進][、][出][口][的][通][道][長][度][淮南導熱油換熱器,][以][提][高][換][熱][效][果][。]

            [ ][ ][(]3[)][在][換][熱][器][上][部][殼][體][設][置][入][孔][淮南導熱油換熱器,][用][于][檢][查][板][束][上][部][膨][脹][節(jié)][。][拆][除][管][束][時][可][以][從][上][部][膨][脹][節(jié)][下][端][斷][開][淮南導熱油換熱器,][分][別][拆][裝][上][部][殼][體][和][膨][脹][節(jié)][。]

            [ ][ ][在][制][造][上][,][改][進][焊][接][工][藝][,][提][高][焊][接][接][頭][的][成][型][質][量][。][在][操][作][上][,][嚴][格][控][制][升][降][溫][速][度][,][保][證][板][束][與][壓][緊][板][的][溫][差][小][于]50e.

            
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