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class="inside_rnewtime">點擊次數：821 發布時間：2019-04-16</div> <div class="inside_rnewcon"> 　　<strong><a href="http://www.renoscrapbooking.com/Products-16915095.html" target="_blank">硬度分析儀</a></strong>基本原理是具有一定質量的沖擊體在一定的試驗力作用下沖擊試樣表面，測量沖擊體距試樣表面1mm處的沖擊速度與回跳速度，利用電磁原理，感應出與速度成正比的電壓。硬度值以沖擊體回跳速度與沖擊速度之比來表示，較硬的材料產生的反彈速度大于較軟者。<div> </div><div>　　根據里氏原理，只要材料具備一定剛性，能形成反彈，就能測出準確的硬度值，但很多材料里氏與其它制式的硬度沒有相應的換算關系，因此硬度分析儀目前只裝了9種材料的換算表。具體材料如下：鋼和鑄鋼，合金工具鋼，灰鑄鐵，球墨鑄鐵，鑄鋁合金，銅鋅合金，銅錫合金，純銅，不銹銅。</div><div> </div><div>　　對于一些特殊材料的試樣，用戶可使用公司提供的擬合曲線軟件做換算表。在實際生產中，使用的金屬材料多種多樣，由于<strong>硬度分析儀</strong>對材料的加工方式、材料的合金元素組成敏感，而硬度分析儀芯片中儲存的硬度換算表不可能都滿足用戶的需要，用戶在測試中，可以使用擬合軟件做自己的硬度換算表。</div><div> </div><div>　　硬度分析儀用于較薄的硬度值測量。采用正四棱錐體金剛石壓頭，在試驗力作用下壓入試樣表面，保持規定時間后，卸除試驗力，測量試樣表面壓痕對角線長度。硬度分析儀試驗的壓痕是正方形，輪廓清晰，對角線測量準確，因此硬度試驗是常用硬度試驗方法中精度高的，同時它的重復性也很好，這一點比布氏硬度計優越。硬度分析儀試驗測量范圍寬廣，可以測量目前工業上所用到的幾乎全部金屬材料，從很軟的材料（幾個硬度單位）到很硬的材料（3000個維氏硬度單位）都可測量。<strong>硬度分析儀</strong>試驗較大的優點在于其硬度值與試驗力的大小無關，只要是硬度均勻的材料，可以任意選擇試驗力，其硬度值不變。這就相當于在一個很寬廣的硬度范圍內具有一個統一的標尺。這一點又比洛氏硬度試驗來得優越。</div> 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