On the base of orthogonal comparison tests, influences of many kinds of factors on the cracking sensibility of plasma clad coatings have been studied in this paper.

本文采用正交对比试验，研究了多种因素对等离子熔覆铁基涂层开裂敏感性的影响。

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The cold cracking sensibility of high tensile pipeline-steel was studied by Ygroove cracking test using seven kinds of high cellulose electrode of vertical down position welding.

采用七种高纤维素型立向下电焊条，通过斜y坡口裂纹实验，对高强管线钢的冷裂敏感性进行实验研究。

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The increase of weld current can reduce the hardness and the content of upper bainite, and lower the sensibility of hydrogen cracking of the joints.

在避免烧穿的前提下增大焊接电流能够减小硬度、减少上贝氏体，从而降低氢致开裂敏感性。

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