金刚一号耐磨焊条W-Cr-B高铬合金焊条
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$35.00
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from NingBo
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  • 3.2mm
  • 4.0mm
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Description

Name:金刚一号耐磨焊条W-Cr-B高铬合金焊条
Commodity number :NO31790

    W-Cr-B为高铬合金焊条,号称,其中熔敷金属化学成分含铬Cr  3% 、含钨W为4 % 、含硼B为3%、  含碳C为2.5- 4.5 %、 锰Mn为1.5%、硅Si为1.5% 、其他成分8%。

    耐磨堆焊焊条,堆焊金属中含高强度的碳化物一次硬相,且硬相部分均匀密集具有较强的抗磨和抗损能力,焊接电弧温,飞溅少,熔敷率高,自动脱渣,堆焊层厚度均匀,表面平整,焊接烟尘中无氟化物等有害介质。低、中碳钢、合金钢、高猛钢均可堆焊,交直流两用,焊前无需对工件预热。

    1.焊条受潮后,需在200-350℃中烘焙1小时,草木灰中缓冷后使用。

    2.堆焊电流要适宜,详细在下面列表中。电流过小,药皮不易熔化,堆焊层粗糙,且合金不能充分熔化,得不到最佳的耐磨堆焊层;电流过大,容易烧损药皮中的合金成分,且第一层堆焊时,母材成份45号钢又会过多的熔入堆焊层,冲淡合金成分,从而降低耐磨层的硬度和使用寿命。

    3.电焊弧长一般控制在3-5mm,弧长过短药皮熔化不好,表面粗糙,弧长过长电弧燃烧不稳定,飞溅增多,易产生气孔,而且合金烧损增加。

    4.堆焊第一层适宜采用短电弧焊接,确保焊深焊透,使焊层和母材牢固的结合为一个整体,然后再堆焊一至多层,以保证耐磨层的适当厚度和硬度,减少修复的次数。

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