Cu227銅227                        符合GB   ECuSn-B磷青銅電焊條                 相當(dāng)AWS  ECuSn-C______________________________________________________________________________  說明：Cu227是錫磷青銅為焊芯、藥皮為低氫型的銅合金焊條。有*定的強度，良好的塑性、耐沖擊性、*磨性及耐腐蝕性能。其特點是焊接工藝性能良好，通用性大。采用直流電源，焊條接正極，電弧穩(wěn)定，成型美觀。用途：用于焊接純銅、黃銅、磷青銅等同種及異種金屬外，還可廣泛用于堆焊磷青銅軸襯、船舶推進器葉片等，也可用于鑄鐵的焊補及堆焊。

焊接電流：3.2mm 120-140A；4.0mm 150-170A熔敷金屬化學(xué)成分（%）______________________________________________________________________________Sn          P          Pb         Cu        Si+Mn+Fe+Al+Ni+Zn7.0-9.0    ≤0.30     ≤0.02      余量           ≤0.50______________________________________________________________________________熔敷金屬機械性能（參數(shù)值）______________________________________________________________________________實驗項目             抗拉強度          延伸率MPa              % ______________________________________________________________________________保證值               ≥270             ≥12______________________________________________________________________________參考電流：DC+______________________________________________________________________________焊條直徑（mm）          3.2               4.0               5.0______________________________________________________________________________焊接電流（A）           90-120            110-160           150-200______________________________________________________________________________注意事項：1、焊前焊條*須在200℃左右烘焙1小時。焊件表面的水份、油污、氧化物等雜質(zhì)*須清除干凈方可施焊。2、焊前需預(yù)熱溫度，磷青銅為150-250℃，純銅為450℃，碳鋼為200℃。3、焊后用平頭錘錘擊焊縫，清除應(yīng)力，改善焊縫質(zhì)量。