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class="inside_rnewtime">點擊次數：790 發布時間：2019-03-14</div> <div class="inside_rnewcon"> 　　<strong><a href="http://www.renoscrapbooking.com/Products-18461090.html" target="_blank">硬度分析儀</a></strong>屬于一種常用的實驗室儀器，一般用來檢測水質中的金屬離子濃度，其測量標準有很多并沒有一個統一的標準。水質硬度又分為兩類，一類是暫時硬度，通過加熱可沉淀；另一種則為硬度，通過加熱不能沉淀。很多軟水系統實驗時都會用到硬度分析儀，用以檢測水質的軟化情況。<div> </div><div>　　我們通常所說的水質硬度是水中鈣、鎂離子的含量，廣泛在水質監測、控制、分析實驗室中。臺水質<strong>硬度分析儀</strong>與1958年誕生，發展至今其測量度、穩定性都有了大幅度的提升，保證了用戶在使用過程中能更好監測實驗數據并控制良好的實驗結果。硬度分析儀在使用時都需要搭配試劑使用，對實驗數據度越高的所使用的試劑規格就越高。</div><div> </div><div>　　當在使用硬度分析儀的時候難免會出現誤差，影響正確的使用，今天帶您正確分析：</div><div> </div><div>　　a、不同的表面光潔度在硬度分析儀測試時，表現出不同的影響。表面光潔度愈低，高硬度測試時其硬度愈高，反之硬度越低，有刀痕的粗糙表面，淬火時首先快冷卻，或很堅硬的表層，硬度值就高。反之，調質件高溫回火時，有刀痕的表層組織先轉變，抗回火的能力小，硬度值就低。在測試表面光潔度Δ7以下的零件時，必須使用廢砂輪精磨，再用銼刀銼磨光滑，或用細的手砂輪磨光，然后揩擦干凈。</div><div> </div><div>　　b、熱處理零件表面有鹽漬、沙子等物，當加負荷時，零件會產生滑移，若有油膩存在，金剛頭壓入時起潤滑作用，減小磨擦，增加壓深。這兩項原因使所測硬度值偏低。<strong>硬度分析儀</strong>零件測試的部位氧化皮蔬松層薄的硬度值降低，氧化皮致密層厚的硬度值增高。對欲測硬度的零件必須去除氧化皮，揩擦干凈，不得有臟物。</div><div> </div><div>　　c、斜面、球面及圓柱體零件對硬度測試的誤差較平面大。當壓頭壓入這種零件表面時，壓入處四周的抗力比平面小，甚至有偏離、滑移的現象，壓深增大，硬度降低。曲率半徑愈小，斜度愈大，硬度數值的降低愈顯著。金剛石壓頭也容易損壞。對這類零件要設計工作臺，使工作臺和壓頭同心.</div> </div> <div class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a href="/Article-530061.html">那如何來保證硬度分析儀出水的硬度呢？</a></b></p> <p id="newsnext">下一篇：<b class="newsnext"><a href="/Article-528373.html">硬度分析儀在檢定中常見的幾種誤差及處理方法</a></b></p> <span><a href="/article.html">返回列表>></a></span> </div> </div> </div> </div> </div>   <div class="footer clearfix"> <div class="footer_wrapper clearfix"> <div class="footer_cen fl"> <span style="font-size:14px; color:#fff;">工作時間</span><br/> 為了避免不必要的等待，敬請注意我們的工作時間。以下是我們的正常工作時間，中國大陸法定節假日除外。<br /> </div> <div class="footer_cen fl"> <span style="font-size:14px; color:#fff;">聯系方式</span><br/> 地址：廣州市黃埔區開源大道11號B10棟606室<br /> 聯系人：鄭先生<br /> 電話(傳真同號)：86-020-28928806<br /> 聯系QQ：149073506<br /> 郵箱：149073506@qq.com </div> <div class="footer_cen fl"> <span style="font-size:14px; color:#fff;">服務保障</span><br/> 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