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GB/T2651-2008焊接強度試驗機拉伸測試

作者：來源：发布日期： 2020.10.20

信息摘要：

GB/T2651-2008焊接強度試驗機拉伸測試

GB/T2651-2008是金屬材料熔化焊和压焊接头的拉伸试验程序规定，试验参照GB/T228标准，采用拉力试验机来协助完成。

焊接接头的拉伸试验（包括全焊缝拉伸试验）试验的目的是测定焊接接头（焊缝）的强度（抗拉强度σb，屈服点σs）和塑性（伸长度δ，断面收缩率φ），并且可以发现断口上的某些缺陷（如白点）。

試驗穩定一般爲常溫條件下，即23度左右。

取樣的位置：試樣應從焊接接頭垂直于焊縫軸線方向截取，試樣加工完成後，焊縫的軸線應位于試樣平行長度部分的中間。
試樣的制備按GB/T2651-2008規定進行。

試驗時，按照GB/T228規定，用試驗機對試樣逐漸連續加載，直至試樣破壞，求得相關力學參數。試驗報告一般需要顯示如下參數：試樣編號、尺寸/直徑、最大載荷、抗拉強度、斷口位置等。

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The Curate, of course, had heard nothing about the Clockwork man's other performances; he had scarcely heeded the hints thrown out about the possibility of movement in other dimensions. It seemed to him, in the uncertain light of their surroundings, that the Clockwork man's right arm gradually disappeared into space. There was no arm there at all. Afterwards, he remembered a brief moment when the arm had begun to grow vague and transparent; it was moving very rapidly, in some direction, neither up nor down, nor this way or that, but along some shadowy plane. Then it went into nothing, evaporated from view. And just as suddenly, it swung back into the plane of the curate's vision, and the hand at the end of it grasped a silk hat. Good fitting is often not so much a question of skill as of the standard which a workman has fixed in his mind, and to which all that he does will more or less conform. 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