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?彈簧钢的力学性能测试（彈簧钢试验机）

作者：來源：发布日期： 2020.10.15

信息摘要：

?彈簧钢的力学性能测试（彈簧钢试验机）

公司名稱：某公司
材料名称：彈簧钢
執行標准：GB/T228-2002
试样参数：直径11mm    标距/跨距50mm
試驗速度：5mm/min
試驗方法：拉伸
引伸计：YYU-5050
夹    具：30T手扳式拉伸夹具
试验设备：彈簧钢拉力试验机 CMT6305
制樣要求：
試驗方案：①選用CMT-6305試驗機，配30T楔形拉伸夾具，Ф8-16夾塊；
②將試驗機准備好並裝上夾具及夾塊；
③測量試樣尺寸並安裝于夾具中；
④安裝引伸計並清零；
⑤設置5mm/min的速度運行，直到試樣斷裂。

彈簧钢拉伸试验报告内容：①试样尺寸            ②最大力         ③ 弹性模量（E）               ④ReH                      ⑤ReL                ⑥力值-变形曲线

參考：
彈簧在冲击、振动或长期交应力下使用，所以要求彈簧钢有高的抗拉强度、弹性极限、高的疲劳强度。彈簧钢应具有优良的综合性能，如力学性能(特别是弹性极限、强度极限、屈强比)、抗弹减性能(即抗弹性减退性能，又称抗松弛性能)、疲劳性能、淬透性、物理化学性能(耐热、耐低温、抗氧化、耐腐蚀等)。为了满足上述性能要求，彈簧钢具有优良的冶金质量(高的纯洁度和均匀性)、良好的表面质量(严格控制表面缺陷和脱碳)、精确的外形和尺寸。

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"And sure," she said, "and I hope that wretched old Feejee won't be in Japan at all, at all, and the horrid haythens won't roast him." THIRD-CLASS PASSENGERS. THIRD-CLASS PASSENGERS. I was about to put a false meaning even on that, when she added "We don't need the ford this time of year; let us ride back as if we gave up the trip--for there may be a vidette looking at us now in the edge of those bushes--and as soon as we get where we can't be seen let us take a circuit. We can cross the creek somewhere above and strike the Wiggins road up in the woods. You can find your way by the blessed stars, can't you--being the angel you are?" "Good-night, gentlemen," said the doctor at last. As he passed into the darkness Quinn bent a mock frown upon his young superior. It would require a mathematical diagram to describe the incident with absolute accuracy. 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. The place given to mathematics as the foundation of a right intellectual training is most remarkable, and shows how truly Plato apprehended the conditions under which knowledge is acquired and enlarged. Here, as in other respects, he is, more even than Aristotle, the precursor of Auguste Comte. He arranges the mathematical sciences, so far as they then existed, in their logical order; and his remarks on the most general ideas suggested by astronomy read like a divination of rational mechanics. That a recommendation of such studies should be put into the mouth of Socrates is a striking incongruity. The older Plato grew the farther he seems to have advanced from the humanist to the naturalistic point of view; and, had he been willing to confess it, Hippias and Prodicus were the teachers with whom he finally found himself most in sympathy. We are told that when his end began to approach, the dying philosopher was pressed to choose a successor in the headship of the School. The manner in which he did this is289 characteristic of his singular gentleness and unwillingness to give offence. It was understood that the choice must lie between his two most distinguished pupils, Theophrastus of Lesbos, and Eudêmus of Rhodes. Aristotle asked for specimens of the wine grown in those islands. He first essayed the Rhodian vintage, and praised it highly, but remarked after tasting the other, ‘The Lesbian is sweeter,’ thus revealing his preference for Theophrastus, who accordingly reigned over the Lyceum in his stead.179 Abibulla saw them off with great deference and a contrite air, and watched their retreat; then, as[Pg 260] I was about to send him to despatch the message, he was indignant. The police! What could they do to a sahib like me? It was all very well to frighten poor folks—it was a sin to waste money in asking for a reply which I should never be called upon to show—and so he went on, till I made up my mind to think no more of the matter. 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