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浦东机械耐高温圆钢材质15CrMo
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<br /> 针对15CrMo钢的焊接性及现场高压管道的工作特点，<br /> <br /> <br /> 方案Ⅰ:焊接预热，采用ER80S-B2L焊丝，T1G焊打底，E8018-B2焊条，焊条电弧焊盖面，焊后进行局部热处理。<br /> <br /> <br /> 表1 焊接材料的化学成分和力学性能<br /> <br /> <br /> 型号 C Mn Si Cr Ni Mo S P δb/Mpa δ,%<br /> <br /> <br /> ER80S-B2L≤0.05 0.70.41.2 <0.20.5 ≤0.025 ≤0.025 ≤500 2515CrMo圆钢<br /> <br /> <br /> E8018-B2 0.070.7 0.3 1.1 0.5 ≤0.04 ≤0.03 550 19<br /> <br /> <br /> E309Mo-16≤0.12 0.5~2.5 0.9 22.0~25.0 12.0~14.0 2.0~3.0≤0.025≤0.035 550 25<br /> <br /> <br /> 2.2 焊前准备<br /> <br /> <br /> 试件采用15CrMo钢管,规格为φ325×25，坡口型式及尺寸见图1。<br /> <br /> <br /> 焊前用角向磨光机将坡口内外及坡口边缘50mm范围内打磨至露出金属光泽，然后用清洗干净。<br /> <br /> <br /> 试件为水平固定位置，对口间隙为4mm，采用手工钨极氩弧焊沿园周均匀点焊六处，每处点固长度应不小于20mm。焊条按表2的规范进行烘烤。<br /> <br /> <br /> 表2 焊条烘烤规范<br /> <br /> <br /> 焊条型号 烘烤温度 保温时间<br /> <br /> <br /> E8018-B2 300 ℃ 2h<br /> <br /> <br /> E309Mo-16 150 ℃ 1.5h<br /> <br /> <br /> 2.3 焊接工艺参数<br /> <br /> <br /> 按方案Ⅰ焊前需进行预热，根据Tto-Bessyo等人提出的计算预热温度公式:<br /> <br /> <br /> To=350√[C]-0.25(℃) 式中，To--预热温度，℃。<br /> <br /> <br /> [C]=[C]x [C]p [C]p=0.005S[C]x<br /> <br /> <br /> [C]x=C (Mn Cr)/9 Ni/18 7Mo/90 式中，<br /> <br /> <br /> [C]x--成分碳当量;<br /> <br /> <br /> [C]p--尺寸碳当量; S--试件厚度(本文中S=25mm);<br /> <br /> <br /> [C]x=C (Mn Cr)/9 7/90Mo=0.361<br /> <br /> <br /> [C]p=0.045 则To=138℃<br/><img src="http://oss11.huangye88.net/live/2024/08/21/ffd4c2294825da53e50957f533bb9e6b.jpg@750w_750h_90Q" /><br/>1.适用于15CrMo合金圆钢、半成品拉制的酸洗方法<br /> <br /> <br /> 现以15CrMo合金圆钢为例，叙述几种常用酸洗工艺。至于经过热处理的半成品，一般不另行剥壳去锈即直接进入酸洗。其它操作顺序则与15CrMo合金圆钢相同。<br /> <br /> <br /> (1)以剥壳、上石灰糊为主的酸洗工艺其工艺流程为。<br /> <br /> <br /> 15CrMo合金圆钢-→剥壳去锈-→酸洗-→水洗-→高压水冲洗-→上油脂石灰糊-→干燥<br /> <br /> <br /> 这种工艺过去应用很广，适用于普碳钢丝、结构钢丝、钢芯铝绞线钢丝、一般弹簧钢丝的毛坯和半成品的拉拔。缺点是粉尘多，已有被其它酸洗工艺取代的趋势。<br /> <br /> <br /> (2)以剥壳、锈化为主的酸洗工艺--其工艺流程为。<br /> <br /> <br /> 15CrMo合金圆钢-→剥壳去锈-→酸洗-→水洗-→高压水冲洗-→锈化-→沾薄石灰水-→干燥<br /> <br /> <br /> 此种拉丝粉尘较少，是当前采用较多的一种。它适用于普碳钢丝、结构钢丝、制绳钢丝、钢芯铝绞线钢丝、一般弹簧钢丝等的毛坯和半成品的拉拔。有的单位还省去锈化工序，冲洗后直接沾灰。<br /> <br /> <br /> (3)以剥壳、磷化为主的酸洗工艺。<br /> <br /> <br /> 15CrMo合金圆钢-→剥壳去锈-→酸洗-→水洗-→高压水冲洗-→磷化-→冲洗-→皂化-→干燥 有的单位将此种工艺用于一般15CrMo合金圆钢的毛坯和半成的拉拔。但在热处理时，仅适用于电接触炉，而不适用于燃料热处理炉，因其会引起马弗砖炉孔的堵塞(电接触炉则无此病)。<br /> <br /> <br /> 此种工艺并不适用予毛坯的酸洗，对于粗规格的线材，由于拉拔后残留的磷化层较厚，还会引起挂铅，尤其不利于钢丝，并且成本较高。<br /> <br /> <br /> (4)以正火、锈化为主的酸洗工艺其工艺流程为:<br /> <br /> <br /> 线材-→正火-→酸洗-→水洗-→高压水冲洗-→锈化-→沾薄石灰水-→干燥 <br /> <br /> <br /> 这种工艺与上述不同，它不剥壳去锈而需经过正火，适用于较高强度弹簧钢丝的毛坯和其他钢丝半成品的拉拔。<br /> <br /> <br /> 2.适用予成品前15CrMo合金圆钢的酸洗工艺<br /> <br /> <br /> 成品前15CrMo合金圆钢，一般指后一道热处理的钢丝.<br /> <br /> <br /> (1)以石灰糊涂层为主的酸洗工艺其工艺流程为。<br /> <br /> <br /> 热处理钢丝-→酸洗-→水洗、高压水冲洗-→浸涂油脂石灰糊-→干燥<br /> <br /> <br /> 这种酸洗工艺仍广泛用于普碳钢丝和一般中碳钢丝成品的拉拔。<br /> <br /> <br /> (2)以硫酸铜涂层为主的酸洗工艺其工艺流程为:<br /> <br /> <br /> 热处理15CrMo合金圆钢-→酸洗-→水洗冲洗-→浸涂硫酸铜-→冲洗-→中和-→干燥<br /> <br /> <br /> 此种工艺适用予普碳钢丝、一般中碳钢丝和普通弹簧钢丝成品的拉拔，但不适用于表面镀锌的钢丝。<br /> <br /> <br /> (3)以磷化涂层为主的酸洗工艺其工艺流程为:<br /> <br /> <br /> 热处理钢丝-→酸洗-→水洗、冲洗-→浸涂磷化层-→水洗、冲洗-→皂化-→干燥<br /> <br /> <br /> 这种酸洗工艺能得到良好的拉拔表面，适用于中碳以上钢丝和高强度弹簧钢丝等成品的拉拔。磷化层的厚度根据拉拔道次而定。<br/><img src="http://oss11.huangye88.net/live/2024/07/27/d5fae71b3f50062a0264f3a63cf47377.jpg@750w_750h_90Q" /><br/>圆钢和碳结钢有什么区别?<br /> 1、圆钢是指截面为圆形的实心长条钢材。其规格以直径表示，单位毫米(mm),如“ 50mm”即表示直径为50毫米的圆钢。<br /> 碳素结构钢简称碳结钢·。具体的讲就是其含碳量小于0.08%。与普碳钢相比，其质量较优，有严格的化学成分并且要求力学性能指标，磷、硫等有豁杂质含量较低的碳素结构钢。<br /> 2、外型不一样，圆钢外型光圆，无纹无肋，碳结钢表面外型有刻纹或有肋，这样就造成圆钢与混凝土的粘结力小，碳结钢与混凝土的粘结力大。<br /> 3、成份不一样，圆钢(钢)属于普通低碳钢，碳结钢筋多为合金钢。<br /> 4、强度不一样，圆钢强度低，碳结钢强度高，即直径大小相同的圆钢与其它钢筋相比，圆钢所能承受的拉力要比其它钢筋小，但圆钢的塑性比其它钢筋强，即圆钢在被拉断前有较大的变形,而在碳结钢被拉断前的变形要小得多。</p> </div> <div class="pages"> <span class="leftpage"><font>上一条 </font><a href="http://www.huangye88.com/sell/info-a73g94kqgb58da.html" target="_blank" title="枣庄Q355C镀锌工字钢电话">枣庄Q355C镀锌工字钢电话</a></span> <span class="rightpage"><font> 下一条</font><a href="http://www.huangye88.com/sell/info-052k6ri228c6fd.html" target="_blank" title="黄冈Q355B镀锌H型钢仓库">黄冈Q355B镀锌H型钢仓库</a></span> </div> </div> </div> </div> </div> <div class="list"> <h2 class="titles" style="float:left;">机械耐高温圆钢相关信息</h2> <a class="r-more" 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"http://nanjing.huangye88.com/xinxi/4678_ec3g851lo89807.html", "appid": "1549701938089057", "title": "浦东机械耐高温圆钢材质15CrMo", "images": [ "//oss11.huangye88.net/live/2024/07/27/491b038b1bd18134bed629e01e7b3c23.jpg", "//oss11.huangye88.net/live/2024/07/27/02bb88ec18f9c8b86a9de7b2d5a82580.jpg", "//oss11.huangye88.net/live/2024/07/27/987a46a757485c77feb4996fc78c3dbf.jpg" ], "description": "浦东机械耐高温圆钢材，耐高温圆钢价格/报价，2.1 焊接材料 针对15CrMo钢的焊接性及现场高压管道的工作特点， 方案Ⅰ:焊接预热，采用ER80S-B2L焊丝，T1G焊打底，E8018-B2焊条，焊条电弧焊盖面，焊后进行局部热处理。 表1 焊接材料的化学成分和力学性能 型号 C Mn Si Cr Ni Mo S P δb/M", "pubDate": "2024-10-15T14:28:52", "upDate": "2025-03-03T16:59:26" } </script> <div class="shade"></div> <div id="zdBG" style="display:none;"></div><div id="pDiv" style="display:none;" class="pop_layer"><div class="pop_bg"><table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td> <iframe scrolling="no" frameborder="0" id="zdf" name="zdf" style="display:none;" visible="false"></iframe></td></tr></tbody></table></div></div> <script 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