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为了测量金属的高温硬度,必需具有专用的真空装置。目前,现有可在高温下测定金属硬度的这类装置,还存在一些缺点,主要是生产率低。另外,当试验时试样难于可靠地固定在工作台上,由于供给试样过程中或沿直径边线计痕时滑动摩擦力会使试样翻倒。上述情况将会使试验中断或影响试验精度。本文描述的装置可排除上述列举的缺点。该装置(图1,a)由真空室6,发热体5、加荷机构2、试样7供给装置14、升降机构10和工作台12组成。导线引入线接在发热体5内。可在侧面外壳罩内任意移动。两个发热体由直径5mm钨丝制造,由钼板
In order to measure the high temperature hardness of the metal, it is necessary to have a special vacuum device. At present, there are some disadvantages of the existing devices capable of measuring the hardness of metals at high temperatures, mainly because of their low productivity. In addition, it is difficult to reliably fix the sample to the table during the test, and the sample may fall down due to the sliding friction during the feeding of the sample or counting along the edge of the diameter. The above situation will interrupt the test or affect the test accuracy. The devices described herein can eliminate the disadvantages listed above. The device (FIG. 1, a) is composed of a vacuum chamber 6, a heating element 5, a loading mechanism 2, a sample 7 feeding device 14, a lifting mechanism 10 and a worktable 12. The lead wire is connected to the heating element 5. Can move freely in the side shell cover. Two heating elements are made of 5 mm diameter tungsten wire made of molybdenum plate