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有色金屬丝试验机拉伸试验GB10573-89

作者：來源：发布日期： 2020.10.20

信息摘要：

有色金屬丝试验机拉伸试验GB10573-89

有色金屬细丝是指直径不大于0.25mm的有色金屬丝材，常温下主要需测试的力学性能包括最大力、抗拉强度、断时总伸长率等性能参数，使用拉力试验机来进行测试。

試驗環境溫度爲10~35度；

裝夾試樣時要保持試樣自由下垂且平直，必要時對試樣施加預張力，其大小一般爲不超過絲材最大力的5%，也可以把被測試樣粘在紙框兩端的直線上，粘接長度及紙框寬度視夾頭大小確定；

試驗速度要求，見下表：

試驗時夾頭移動速度爲5mm/min；

規定總伸長力和規定總伸長應力的測定時，用只讀法時，被測試樣在拉伸過程中達到規定總伸長時，試驗機自動停機，並記錄相應的力；

最大力、抗拉強度的測定，試樣拉至斷裂，從拉伸曲線上確定試驗過程中的最大力，用最大力除以原始橫截面積即爲抗拉強度；

其他如斷時總伸長率等測量方式也都有相關規定，見標准原件。

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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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