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?螺栓拉伸試驗方案（螺栓拉力試驗機）

作者：來源：发布日期： 2020.10.15

信息摘要：

?螺栓拉伸試驗方案（螺栓拉力試驗機）

公司名稱：某公司
試樣名稱：螺栓
執行標准：GB/T228-2002
試樣參數：直徑M16*52
試驗速度：2mm/min
試驗方法：拉伸
试验设备：螺栓拉力试验机 CMT5305
引伸计：YYV-5020
夹    具：30T螺栓专用夹具   直径：M16*1.5
制样要求：六角头螺栓   Ф151B1652    10.9级
試驗方案：①：將夾具裝上，並裝上試樣，調整橫梁後裝上引伸計。
②：對小變形位移清零
③：以2mm/min    速度运行直到试样断裂
④：出試驗報告
报告内容：①: 抗拉力
②: 抗拉强度
③：屈服強度
④：Rp0.2
⑤: 延伸率
螺栓拉伸試驗特征曲線：

螺栓力學性能：

鋼結構連接用螺栓性能等級分3.6、4.6、4.8、5.6、6.8、8.8、9.8、10.9、12.9等10余個等級，其中8.8級及以上螺栓材質爲低碳合金鋼或中碳鋼並經熱處理（淬火、回火），通稱爲高強度螺栓，其余通稱爲普通螺栓。螺栓性能等級標號有兩部分數字組成，分別表示螺栓材料的公稱抗拉強度值和屈強比值。

緊固件的拉伸力學性能檢測
由于緊固件形狀尺寸各異、大載荷需求、要求增加了緊固件拉伸試驗的難度。還要測試螺紋質量和緊固件頭強度。

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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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