• <b id="nxm8h"><sub id="nxm8h"></sub></b>
    1. <source id="nxm8h"><mark id="nxm8h"><div id="nxm8h"></div></mark></source>
    2. <video id="nxm8h"><mark id="nxm8h"><div id="nxm8h"></div></mark></video><b id="nxm8h"><address id="nxm8h"><dl id="nxm8h"></dl></address></b><u id="nxm8h"></u> <tt id="nxm8h"><small id="nxm8h"><kbd id="nxm8h"></kbd></small></tt>
    3. <b id="nxm8h"><tbody id="nxm8h"><ol id="nxm8h"></ol></tbody></b>
      1. <i id="nxm8h"><sub id="nxm8h"></sub></i>
      2. <rp id="nxm8h"><mark id="nxm8h"><legend id="nxm8h"></legend></mark></rp>
      3. <source id="nxm8h"></source>

        <rp id="nxm8h"></rp>

        主頁 > 新聞動態 > 鋁鎂合金管母線安裝時對氯氣的要求

        鋁鎂合金管母線安裝時對氯氣的要求

        發布時間:2020-05-22 11:20    閱讀:

          氬氣的純度要控制在99.9%以上,其中雜質氧小于0.005%以下,氫0.005%以下,水份0.02mg/L以下,氮0.015%以下。氧、氮增多均惡化陰極霧化作用。氧超過0.3%則使鎢極燒損加劇,超過0.1%氧則使焊縫表面無光澤或發黑,氮超過0.05%熔池的流動性變壞,焊接表面成形不良。

        ? 亚洲AV无码一区二区二三区∝|一本久久a久久精品vr综合|国产成人高清精品亚洲网站|欧洲乱码伦视频免费国产
      4. <b id="nxm8h"><sub id="nxm8h"></sub></b>
        1. <source id="nxm8h"><mark id="nxm8h"><div id="nxm8h"></div></mark></source>
        2. <video id="nxm8h"><mark id="nxm8h"><div id="nxm8h"></div></mark></video><b id="nxm8h"><address id="nxm8h"><dl id="nxm8h"></dl></address></b><u id="nxm8h"></u> <tt id="nxm8h"><small id="nxm8h"><kbd id="nxm8h"></kbd></small></tt>
        3. <b id="nxm8h"><tbody id="nxm8h"><ol id="nxm8h"></ol></tbody></b>
          1. <i id="nxm8h"><sub id="nxm8h"></sub></i>
          2. <rp id="nxm8h"><mark id="nxm8h"><legend id="nxm8h"></legend></mark></rp>
          3. <source id="nxm8h"></source>

            <rp id="nxm8h"></rp>