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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>论电极的重要?/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>2019-03-27 <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://www.ppstonez.com">电极</a>的重要?nbsp; </p> <p>    电极是点焊当中最为关键的易损耗零件,正确选用电极是获得优质焊点提高生产率的重要手段,在选购电极时,要求制造电极的材料具有足够高的电导率、热导率和高温硬度,电极的结构必须有足够的强度和刚度,以及充分冷却的条件,此外,电极与工件间接触电阻应足够低,以防止工件表面过热熔化或工件之间的合金化?/p> <p>    在实际生产中应注意,不全是由于电极工作端面变形的加粗量超过规定才予以休整,而往往是由于电极与焊件表面发生粘损这一恶性循环现象,将使焊接生产不能继续进行,产生这一现象原因主要与电极处于苛刻的焊接工艺条件有关,因此,应对电极材料、电极形式、焊接对象(材质及结构)、机器类型等综合考虑?/p> <p>按国家要求电极标准可分为三大类:</p> <p>     1?---高电导率、中等硬度的铜及铜合金。这类材料主要通过冷作变形的方法达到其硬度要求,适用于铝及铝合金的焊接,也可用于镀层钢板的点焊,但性能不如2类合金?类合金还常用于制造不受力或低应力的导电部件?/p> <p>     2?---电导率较高(低于1类),硬件度较高(高?类)的合金,这类合金可通过准冷作变形与热处理相结合的方法达到其性能要求。与1类合金相比,它具有较高的力学性能,适中的电导率,因此是最通用的电极材料,广泛用于点焊低碳钢、低合金钢、不锈钢、高温合金、电导率低的铜合金,以及镀层钢等?/p> <p>     3?---电导率较低(低于1?类),硬度高(高??类)的合金。这类合金可通过热处理或冷作变形和热处理相结合的方法达到其要求。这类合金具有更高的力学性能,耐磨性好,软化温度高。但电导率较低,因此适用于点焊电阻率和高温强度高的材料?/p> <p> </p> <p> </p> <p> </p> <p>                               --沈阳威克创新焊接设备有限公司</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/1697bd6e-4713-4b18-8d92-1d4d4db3c92b-tj.js" charset="utf-8"></script><script> (function(){ var canonicalURL, curProtocol; 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