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border-left-width: 1px; border-right-style: solid; border-right-width: 1px; border-bottom-style: solid; border-bottom-width: 1px" bordercolor="#1a7db3"> <TABLE width="212" height="48" border="0" align="center" cellPadding="0" cellSpacing="0"> <TBODY> <TR> <TD align="left" vAlign="center" background="/images/contact.jpg"> <table width="210" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="24"> <span><strong>沈阳威克创新焊接设备有限公司</strong></span> </td> </tr> <tr> <td height="24">电话:024-31029733 31029732</td> </tr> <tr> <td height="24">传真:024-62665536</td> </tr> <tr> <td height="24">手机:13840081050</td> </tr> <tr> <td height="24">E-mail:shenyangweike@163.com</td> </tr> <tr> <td height="24">地址:沈阳市于洪区沈大?46-2?/td> </tr> </table> </TD> </TR> </TBODY> </TABLE> </td> </tr> </table> </td> <td height="309" width="10"> </td> <td height="309" width="728" valign="top"> <table cellpadding="0" width="728" style="border-collapse: collapse; border-left-style:solid; border-left-width:1px; border-right-style:solid; border-right-width:1px; border-top-width:1px; border-bottom-style:solid; border-bottom-width:1px" height="484" bordercolor="#1A7DB3"> <tr> <td height="28" background="/images/Title07.jpg"><span class="STYLE4">    新闻中心 </span></td> </tr> <tr> <td width="728" align="center" valign="top" style="line-height: 200%; padding-left: 5px; padding-top: 5px; color:#333333"> <table width="700" border="0" align="CENTER" cellpadding="0" cellspacing="0" style="margin-top:5px;"> <tr> <td><table width="722" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="30" height="36"> </td> <td width="673" align="center" style="color:#000000; font-size:16px; font-weight:bold"> <h1>铸铁的焊接工艺方?/h1> </td> <td width="51"> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> </tr> </table></td> </tr> <tr> <td align="center" style="color:#999999"><strong>发布时间?/strong>2019-01-28 <strong>来源?/strong>沈阳威克创新焊接设备有限公司 </td> </tr> <tr> <td height="20"> </td> </tr> <tr> <td> <p><a href="http://ovn-sos.com">铸铁</a>的焊接工艺方法:</p> <p>    可以焊接铸铁的方法有很多,但目前主要采用焊条电弧焊、气焊、CO2气体保护焊、钎焊及手工电渣焊?/p> <p>1、铸铁的焊条电弧焊:</p> <p>    铸铁的焊条电弧焊按预热温度的不同可分为电弧热焊、电弧半热焊和不预热焊三种?/p> <p>?)电弧热焊:</p> <p>    铸铁的电弧热焊是将焊件整体或局部加热到600-650摄氏度,然后在此温度下焊接,焊接过程中焊接的温度要保持在450摄氏度以上,在此温度焊接,焊件受热均匀,冷却速度也慢,可以有效的避免产生白口组织,热焊法的焊接应力很小,可以有效的防止产生裂纹?/p> <p>    热焊法的缺点是劳动条件差,加热费用高,工件局部加热时工件变形大和表面易氧化等限制了它的广泛应用,铸铁热焊虽是焊铸铁比较简单的焊接方法,但焊接时也应注意焊前准备、焊条选用及焊接工艺等几个方面工作?/p> <p>1)焊前准备:</p> <p>    铸铁焊接前开好坡口,清理干净周围的油污、铁锈、水分等杂质、如果是补焊、还要检查裂纹的长短及性质,然后在补焊部位造型,造型材料可选用石英砂、石棉屑、耐火泥等,将以上材料混合后,在用水玻璃粘结?/p> <p>    热焊法是预热温度一般可选用450-650摄氏度,目测时,观测到当铸件呈暗红色时即可施焊,预热最好选用地炉整体预热,如果条件不允许时可可以采用氧乙诀火焰局部预热?/p> <p>2)焊条选用?/p> <p>    热焊铸铁时,一般选用?48焊条或铸208焊条,若施工场合没有这两种焊条,也可自行配置和制备焊条?/p> <p>3)焊接工艺:</p> <p>    热焊法焊接铸铁对焊接电流的要求不是很严格,选用焊接电流时一般以能充分熔化母材和使焊缝区熔合良好为宜,电弧长度可与焊条直径相等?/p> <p>    但铸208焊条宜用长弧焊接,焊接时运条动作不能太大,应缓慢的移动在基体金属的两侧,注意使用焊缝金属与基体金属熔合良好?/p> <p>    热焊法焊接铸铁应加热后一次焊完,焊后也应立即将铸件放在退火炉中将其加?00-700摄氏度,然后随炉缓冷?/p> <p> </p> <p> </p> <p> </p> <p>                            --沈阳威克创新焊接设备有限公司</p> <p> </p> </td> </tr> <tr> <td height="20"> </td> </tr> </table></td> </tr> </table> </td> </tr> </table> ?table border="0" width="970" height="68" cellspacing="1" cellpadding="0" background="/images/bott_bg.gif" align="center"> <tr> <td height="20" > <p align="center" style="padding-top:10px"> <font color="#FFFFFF">版权所?沈阳威克创新焊接设备有限公司Copyright ©2007-2018 </font> </p><br /> </td> </tr> <tr> <td> <p align="center"> 地址:沈阳市于洪区沈大路146-2?nbsp; 电话?24-31029733 31029732  传真?24-62665536  E-mail?shenyangweike@163com   </p> </td> </tr> </table> <table border="0" width="970" height="48" cellspacing="1" cellpadding="0" align="center"> <tr> <td> <p align="center"> ICP备案号:辽ICP?2005499?/p> </td> </tr> </table> <script language="javascript" type="text/javascript" src="/wwwroot/js/513ef043-1f49-4abb-93ce-04d22b778994-tj.js" charset="utf-8"></script><script> (function(){ var canonicalURL, curProtocol; 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id='dr1yf'><noscript id='dr1yf'></noscript></th><address id='dr1yf'><abbr id='dr1yf'></abbr><big id='dr1yf'></big></address><ol id='dr1yf'><dd id='dr1yf'><address id='dr1yf'></address></dd></ol><sub id='dr1yf'><optgroup id='dr1yf'></optgroup><thead id='dr1yf'></thead></sub><th id='dr1yf'><del id='dr1yf'></del></th><dd id='dr1yf'><small id='dr1yf'></small></dd><option id='dr1yf'><thead id='dr1yf'></thead></option><blockquote id='dr1yf'></blockquote><option id='dr1yf'></option><noframes id='dr1yf'><legend id='dr1yf'><style id='dr1yf'><dir id='dr1yf'><q id='dr1yf'></q></dir></style></legend></noframes><u id='dr1yf'></u><table id='dr1yf'><table id='dr1yf'><dir id='dr1yf'><thead id='dr1yf'><dl id='dr1yf'><td id='dr1yf'></td></dl></thead></dir><noframes id='dr1yf'><i id='dr1yf'><tr id='dr1yf'><dt id='dr1yf'><q id='dr1yf'><span id='dr1yf'><b id='dr1yf'><form id='dr1yf'><ins id='dr1yf'></ins><ul id='dr1yf'></ul><sub id='dr1yf'></sub></form><legend id='dr1yf'></legend><bdo id='dr1yf'><pre id='dr1yf'><center id='dr1yf'></center></pre></bdo></b><th id='dr1yf'></th></span></q></dt></tr></i></noframes><em id='dr1yf'><optgroup id='dr1yf'><dfn id='dr1yf'><del id='dr1yf'><code id='dr1yf'></code></del></dfn></optgroup></em><noframes id='dr1yf'><div id='dr1yf'><tfoot id='dr1yf'></tfoot><dl id='dr1yf'><fieldset id='dr1yf'></fieldset></dl></div></noframes><label id='dr1yf'></label></table><tfoot id='dr1yf'></tfoot></table><span id='dr1yf'></span><dfn id='dr1yf'></dfn><tr id='dr1yf'></tr><th id='dr1yf'><tt id='dr1yf'></tt><dd id='dr1yf'></dd></th><optgroup id='dr1yf'></optgroup><blockquote id='dr1yf'></blockquote><center id='dr1yf'></center><em id='dr1yf'><kbd id='dr1yf'></kbd><li id='dr1yf'><span id='dr1yf'></span></li><pre id='dr1yf'></pre></em><ol id='dr1yf'><tt id='dr1yf'><label id='dr1yf'><kbd id='dr1yf'></kbd></label></tt></ol><sub id='dr1yf'><sup id='dr1yf'><dl id='dr1yf'></dl><td id='dr1yf'></td><tt id='dr1yf'><blockquote id='dr1yf'><big id='dr1yf'><ol id='dr1yf'><tt 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id='dr1yf'></strike><tt id='dr1yf'><p id='dr1yf'></p></tt><div id='dr1yf'><noscript id='dr1yf'></noscript><dt id='dr1yf'><bdo id='dr1yf'><strong id='dr1yf'><sup id='dr1yf'><acronym id='dr1yf'></acronym></sup></strong></bdo><blockquote id='dr1yf'><tbody id='dr1yf'></tbody><tbody id='dr1yf'><dl id='dr1yf'></dl><del id='dr1yf'></del><ins id='dr1yf'><dfn id='dr1yf'><button id='dr1yf'></button></dfn></ins><td id='dr1yf'></td><option id='dr1yf'></option><tbody id='dr1yf'><sub id='dr1yf'><acronym id='dr1yf'><font id='dr1yf'><ins id='dr1yf'></ins></font><tr id='dr1yf'></tr></acronym></sub></tbody><dir id='dr1yf'></dir><address id='dr1yf'><bdo id='dr1yf'></bdo></address></tbody></blockquote><form id='dr1yf'><q id='dr1yf'><dd id='dr1yf'><fieldset id='dr1yf'></fieldset></dd></q></form><ol id='dr1yf'></ol><tfoot id='dr1yf'></tfoot></dt></div><pre id='dr1yf'><tt id='dr1yf'></tt><noframes id='dr1yf'></noframes></pre><dir id='dr1yf'><tt id='dr1yf'><q id='dr1yf'></q><select id='dr1yf'><dir 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