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text-center">石墨坩堝的材料應該如何選?。?/h1> <div id="p5pndbt" class="ap text-center"> <span id="7lbp7l5" class="author">作者：http://xiaofei168.com</span> <span id="7dttjbb" class="public_time">發布時間：2021-01-29 16:35:06</span> </div> <p><span style="font-size: medium;"> <span style="font-weight: bold;">石墨坩堝</span>選用天然鱗片石墨、臘石、碳化硅等質料制成的高檔耐火器皿，供鍛煉、熔鑄銅、鋁、鋅、鉛、金、銀以及各種稀有金屬之用。制造它時離不開坩鍋爐，它們是兩者不行缺一的。是要高坩堝爐的工作效率進步了，相應的石墨坩堝的工作效率天然也會進步。石墨坩堝用后放置干燥處，切忌雨水侵入；運用前須緩慢烘烤到500攝氏度方可運用。應避免強氧化火焰直接噴射到坩堝上，而使坩堝質料氧化短命。</span></p><p><span style="font-size: medium;"> 坩堝運用壽數與用法有關，應避免強氧化火焰直接噴射到坩堝上，而使坩堝質料氧化短命。石墨坩堝具有以上許多功用，所以在冶金、鑄造、機械、化工等工業部門，被廣泛用于合金工具鋼的鍛煉和有色金屬及其合金的熔煉。</span></p><p><span style="font-size: medium;"> 一般情況下制造坩堝的原材料應耐火度高，要有很強的耐高溫系數。還有坩堝質料要有滿足的強度，在鍛煉過程中受高溫等的沖擊，會有磨損，因而質料強度假如不高的話，很可能會導致坩堝越運用越波，越短少韌性。一起坩堝收縮系數要小，能接受溫度急劇改變而不致至變形和分裂，還有在選材上要留意與所熔金屬不起化學反響，而且化學金屬的耐高溫型也要高，不能因為燒灼坩堝時發生丟失。在熔煉金屬的時分需求高溫，坩堝選材應保證高溫下化學穩定性要學。由此可見坩堝在選材需留意很多，用處選用不同的材料。</span></p><p><span style="font-size: medium;"> 坩堝，是以結晶形天然石墨為主體質料，可塑性耐火粘土作粘結劑，經與不同類型熟料配合而制成的首要應用于鍛煉特種合金鋼、熔化有色金屬及其合金的耐火石墨坩堝。<span style="font-weight: bold;">石墨坩堝</span>歸納了以往石墨坩堝的優點，取長補短，有密度高，強度大，導熱快，節能環保，壽數長的特點。</span></p><p><span style="font-size: medium;"> 石墨粘土坩堝是以結晶形天然石墨為主體質料，使其壽數高耐酸堿熔鋅坩堝，可塑性耐火粘土作粘結劑。經過與不同類型熟料配合而制成的首要應用于鍛煉特種合金鋼、熔化有色金屬及其合金的耐火石墨坩堝。所以制造防火性石墨坩堝離不開石墨粘土坩堝的一部分。 </span><br></p>  </div> <div id="lv7fdpp" class="navs clearfix"> <div id="77rhx7j" class="pre"> <span>上一篇：</span> <a href="../col_46/05165.html" class="pre_link" target="_blank">等靜壓石墨坩堝有什么特點？</a>  </div> <div id="xphxzzz" class="next"> <span>下一篇：</span> <a href="../col_46/05163.html" class="next_link" target="_blank">石墨電極的材料有什么特殊之處？</a>  </div> </div> </main> <aside id="aside"> <ul class="aside_list"> <li id="7zbhxpr" class="aside_item"> <a href="javascript:;"> <i class="iconfont icon-dianhua"></i> </a> <div id="l7dj5zt" class="aside_hover_box" id="telephone"> <span id="hbd57jx" class="gray_arrow"> </span> <span id="zhxx5zx" class="white_arrow"></span> <div 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