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焊縫的試驗機拉伸測試GB/T2652-2008

作者：來源：发布日期： 2020.10.20

信息摘要：

焊縫的試驗機拉伸測試GB/T2652-2008

GB/T2652-2008标准主要规定焊缝及熔敷金屬拉伸试验的方法和试样制备方法，试验设备为拉力试验机，拉伸试验按GB/T228标准进行。

试样应从试件的焊缝及熔敷金屬上纵向截取，加工完成后，试样的平行长度应全部由焊缝金屬组成，如图：

爲了確保試樣在接頭的正確定位，試樣兩端的接頭橫截面可做宏觀腐蝕。

取樣所采用的機械加工方法或熱處理方法不得對試樣性能産生影響。

試樣表面應避免産生變形硬化或過熱。

試驗時，用拉力試驗機逐步連續加載，直至試樣破壞，求得相關力學參數。試樣斷裂後，應檢驗斷口表面，在斷口上對試驗可能産生有害影響的缺欠都應在報告中記錄，記錄包括缺欠類型、尺寸和數量，有白點存在時，應做記錄且僅將白點的中心區域視爲缺欠。

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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. If this standard is one of exactness and precision, all that is performed, whether it be filing, turning, planing, or drawing, will come to this standard. This faculty of mind can be defined no further than to say that it is an aversion to whatever is imperfect, and a love for what [171] is exact and precise. There is no faculty which has so much to do with success in mechanical pursuits, nor is there any trait more susceptible of cultivation. Methodical exactness, reasoning, and persistence are the powers which lead to proficiency in engineering pursuits. I was the only civilian in that road, and the soldiers, with much curiosity, stared at me. Whenever I noticed an officer, I gave an elaborate military salute, and with such an air that the officers, although hesitating at first, did not fail to return the salute. The reformed system of education was to be not only moral and religious but also severely scientific. 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