不鏽鋼焊條試用注意事項

摘要：<span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";"><span style="font-size:small;">不鏽鋼焊條試用注意事項</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">1</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、鉻不鏽鋼具有一定的耐蝕</span><span style="font-family:'Times New Roman';"><span lang="EN-US">(</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">氧化性酸、有機酸、氣蝕</span><span style="font-family:'Times New Roman';"><span lang="EN-US">)</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、耐熱和耐磨性能。通常用於電站、化工、石油等設備材料。鉻不鏽鋼焊接性較差，應注意焊接工藝、熱處理條件及選用合適電焊條。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">2</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、鉻</span><span style="font-family:'Times New Roman';"><span lang="EN-US">13</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">不鏽鋼焊後硬化性較大，容易產生裂紋。若采用同類型的鉻不鏽鋼焊條</span><span style="font-family:'Times New Roman';"><span lang="EN-US">(G202</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、</span><span style="font-family:'Times New Roman';"><span lang="EN-US">G207)</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">焊接，必須進行</span><span style="font-family:'Times New Roman';"><span lang="EN-US">300</span></span><span style="font-family:宋體;mso-bidi-font-family:宋體;">℃</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">以上的預熱和焊後</span><span style="font-family:'Times New Roman';"><span lang="EN-US">700</span></span><span style="font-family:宋體;mso-bidi-font-family:宋體;">℃</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">左右的緩冷處理。若焊件不能進行焊後熱處理，則應選用鉻鎳不鏽鋼焊條</span><span style="font-family:'Times New Roman';"><span lang="EN-US">(A107</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、</span><span style="font-family:'Times New Roman';"><span lang="EN-US">A207)</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">3</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、鉻</span><span style="font-family:'Times New Roman';"><span lang="EN-US">17</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">不鏽鋼，為改善耐蝕性能及焊接性而適當增加適量穩定性元素</span><span style="font-family:'Times New Roman';"><span lang="EN-US">Ti</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、</span><span style="font-family:'Times New Roman';"><span lang="EN-US">Nb</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、</span><span style="font-family:'Times New Roman';"><span lang="EN-US">Mo</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">等，焊接性較鉻</span><span style="font-family:'Times New Roman';"><span lang="EN-US">13</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">不鏽鋼好一些。采用同類型的鉻不鏽鋼焊條</span><span style="font-family:'Times New Roman';"><span lang="EN-US">(G302</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、</span><span style="font-family:'Times New Roman';"><span lang="EN-US">G307)</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">時，應進行</span><span style="font-family:'Times New Roman';"><span lang="EN-US">200</span></span><span style="font-family:宋體;mso-bidi-font-family:宋體;">℃</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">以上的預熱和焊後</span><span style="font-family:'Times New Roman';"><span lang="EN-US">800</span></span><span style="font-family:宋體;mso-bidi-font-family:宋體;">℃</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">左右的回火處理。若焊件不能進行熱處理，則應選用鉻鎳不鏽鋼焊條</span><span style="font-family:'Times New Roman';"><span lang="EN-US">(A107</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、</span><span style="font-family:'Times New Roman';"><span lang="EN-US">A207)</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">4</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、鉻鎳不鏽鋼焊條具有良好耐腐蝕性和抗氧化性，廣泛應用於化工、化肥、石油、醫療機械製造。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">5</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、鉻鎳不鏽鋼焊接時，受到重複加熱析出碳化物，降低耐腐蝕性和力學性能。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">6</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、鉻鎳不鏽鋼藥皮有鈦鈣型和低氫型。鈦鈣型可用於交直流，但交流焊時熔深較淺，同時容易發紅，故儘可能采用直流電源。直徑</span><span style="font-family:'Times New Roman';"><span lang="EN-US">4.0</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">及以下可用於全位置焊件，</span><span style="font-family:'Times New Roman';"><span lang="EN-US">5.0</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">及以上用於平焊及平角焊。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">7</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、焊條使用時應保持乾燥，鈦鈣型應經</span><span style="font-family:'Times New Roman';"><span lang="EN-US">150</span></span><span style="font-family:宋體;mso-bidi-font-family:宋體;">℃</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">乾燥</span><span style="font-family:'Times New Roman';"><span lang="EN-US">1</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">小時，低氫型應經</span><span style="font-family:'Times New Roman';"><span lang="EN-US">200</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">～</span><span style="font-family:'Times New Roman';"><span lang="EN-US">250</span></span><span style="font-family:宋體;mso-bidi-font-family:宋體;">℃</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">乾燥</span><span style="font-family:'Times New Roman';"><span lang="EN-US">1</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">小時</span><span style="font-family:'Times New Roman';"><span lang="EN-US">(</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">不能多次重複烘乾，否則藥皮容易開裂剝落</span><span style="font-family:'Times New Roman';"><span lang="EN-US">)</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">，防止焊條藥皮粘油及其它臟物，以免致使焊縫增加含碳量和影響焊件質量。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span style="font-size:small;"><span style="font-family:'Times New Roman';"><span lang="EN-US">8</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">、為防止由於加熱而產生睛間腐蝕，焊接電流不宜太大，比碳鋼焊條較少</span><span style="font-family:'Times New Roman';"><span lang="EN-US">20%</span></span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman";">左右，電弧不宜過長，層間快冷，以窄焊道為宜。</span></span> </p> <span style="font-family:宋體;font-size:small;"> </span> <p style="margin:0cm 0cm 0pt;"> <span lang="EN-US"><span style="font-family:'Times New Roman';font-size:small;"> </span></span> </p> <span style="font-family:宋體;font-size:small;"> </span>