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?冰箱压缩机及制冷设备用铸铁拉伸试验GB/T 228-2002

作者：來源：发布日期： 2020.10.15

信息摘要：

?冰箱压缩机及制冷设备用铸铁拉伸试验GB/T 228-2002

客戶名稱：某制冷設備公司
試樣名稱：鑄鐵棒/208
执行标准：GB/T 228-2002 金屬材料室温拉伸试验方法
試樣直徑：12.5MM
試驗方案：

1.選用10T楔形拉伸夾具配φ16～25mm形鉗口
2.夾持試樣上端美工力值清零
3.用適當速度移動橫梁到適當位置，夾持試樣下端
4.微動將力值卸到10～2n，並設置試驗速度爲3mm/min
5.將位移清零，運行，直到試驗結束
6.出試驗報告

試驗報告：尺寸、截面積、抗拉力、抗拉強度
试验设备：CMT6105電子萬能試驗機
其他：該試驗所用的夾具是10T楔形拉伸夾具（標配），其圖號爲K100-L-01

試驗特征曲線圖：

背景：
关于制冷设备零部件及冰箱压缩机铸铁：冰箱压缩机铸件材质要求冰箱压缩机铸件,除曲轴系球铁外,其它铸件均为HT200。压缩机铸件除尺寸精度要求很严外,铸件本体不能存在铸造缺陷,并且要求铸件交货时表面为金屬本色经防锈处理。压缩机铸件属小型薄壁精细铸件。

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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. 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