摘要：<span>西安304</span><span style="font-family:宋體;">不銹鋼板折彎加工的特點</span> <p class="MsoNormal"> <span>西安304</span><span style="font-family:宋體;">不銹鋼板表面美觀以及使用可能性多樣化</span><span>,</span><span style="font-family:宋體;">耐腐蝕性能好</span><span>,</span><span style="font-family:宋體;">比普通鋼長久耐用，西安</span><span>304</span><span style="font-family:宋體;">不銹鋼板耐腐蝕性好強度高</span><span>,</span><span style="font-family:宋體;">因而薄板使用的可能性大</span><span>,</span><span style="font-family:宋體;">耐高溫氧化及強度高</span><span>,</span><span style="font-family:宋體;">因此能夠抗火災常溫加工</span><span>,</span><span style="font-family:宋體;">即容易塑性加工</span><span>,</span><span style="font-family:宋體;">因為不必表面處理</span><span>,</span><span style="font-family:宋體;">所以簡便、維護簡單清潔</span><span>,</span><span style="font-family:宋體;">光潔度高焊接性能好。</span> </p> <p class="MsoNormal"> <span>西安316</span><span style="font-family:宋體;">與</span><span>304</span><span style="font-family:宋體;">在化學成分上的*主要區(qū)別就是</span><span>316</span><span style="font-family:宋體;">含</span><span>Mo,</span><span style="font-family:宋體;">而且一般公認</span><span>,316</span><span style="font-family:宋體;">的耐腐蝕性更好些</span><span>,</span><span style="font-family:宋體;">比</span><span>304</span><span style="font-family:宋體;">在高溫環(huán)境下更耐腐蝕。所以在高溫環(huán)境下</span><span>,</span><span style="font-family:宋體;">工程師一般都會選用</span><span>316</span><span style="font-family:宋體;">材料的零部件。但所謂事無**</span><span>,</span><span style="font-family:宋體;">在濃硫酸環(huán)境下</span><span>,</span><span style="font-family:宋體;">再高溫度也千萬別用</span><span>316,</span><span style="font-family:宋體;">我們知道為了防止在高溫情況下螺紋咬死</span><span>,</span><span style="font-family:宋體;">需要涂抹的一種黑乎乎的固體潤滑劑。</span> </p> <p class="MsoNormal"> <span>西安304</span><span style="font-family:宋體;">由于不銹鋼本身屈服點高</span><span>,</span><span style="font-family:宋體;">硬度高</span><span>,</span><span style="font-family:宋體;">冷作硬化效應顯著</span><span>,西安304</span><span style="font-family:宋體;">不銹鋼板進行折彎時其特點如下</span><span>:</span><span style="font-family:宋體;">因導熱性比普通低碳鋼差</span><span>,</span><span style="font-family:宋體;">延伸率低</span><span>,</span><span style="font-family:宋體;">導致所需變形力大</span><span>;</span><span style="font-family:宋體;">不銹鋼板料在折彎時與碳鋼相比有強烈的回彈傾向</span><span>;</span><span style="font-family:宋體;">不銹鋼板相對于碳鋼由于延伸率低</span><span>, </span><span style="font-family:宋體;">折彎時工件折彎角</span><span>R</span><span style="font-family:宋體;">要大于碳鋼</span><span>,</span><span style="font-family:宋體;">否則有出現裂紋的可能</span><span>;</span><span style="font-family:宋體;">由于</span><span>304</span><span style="font-family:宋體;">不銹鋼板硬度高</span><span>,</span><span style="font-family:宋體;">冷作硬化效應顯著因此在選擇壓彎刀具時要選擇熱處理硬度應達到</span><span>60HRC</span><span style="font-family:宋體;">以上的工具鋼</span><span>, </span><span style="font-family:宋體;">其表面粗糙度要比碳鋼的壓彎刀具高一個數量級。</span> </p> <p class="MsoNormal"> <span style="font-family:宋體;">根據以上特性</span><span>,</span><span style="font-family:宋體;">一般來說</span><span>:</span><span style="font-family:宋體;">單位尺寸下</span><span>,</span><span style="font-family:宋體;">板材越厚</span><span>,</span><span style="font-family:宋體;">所需折彎力越大</span><span>,</span><span style="font-family:宋體;">而且隨著板厚增大在選擇折彎設備時折彎力的裕量應該更大</span><span>;</span><span style="font-family:宋體;">單位尺寸下</span><span>,</span><span style="font-family:宋體;">抗拉強度越大</span><span>,</span><span style="font-family:宋體;">延伸率越小</span><span>,</span><span style="font-family:宋體;">所需折彎力越大</span><span>,</span><span style="font-family:宋體;">折彎角應該越大。</span> </p> <p class="MsoNormal"> <span style="font-family:宋體;">根據實際情況</span><span>,</span><span style="font-family:宋體;">一道彎工件的展開尺寸為直角邊相加減去兩個板厚</span><span>,</span><span style="font-family:宋體;">完全可以滿足設計精度要求</span><span>,</span><span style="font-family:宋體;">根據經驗公式計算展開量可簡化計算過程大大提高生產效率</span><span>;</span><span style="font-family:宋體;">材質的屈服強度越大</span><span>,</span><span style="font-family:宋體;">彈性回復量就越大</span><span>,</span><span style="font-family:宋體;">為獲得折彎件</span><span>90</span><span style="font-family:宋體;">度的角度</span><span>,</span><span style="font-family:宋體;">所需壓刀的角度就要設計的越小。相對于碳鋼相同板厚的</span><span>304</span><span style="font-family:宋體;">不銹鋼板折彎角較大</span><span>,</span><span style="font-family:宋體;">這一點應特別注意否則會出現壓彎裂紋</span><span>,</span><span style="font-family:宋體;">影響工件強度。無時非在該拉淡件由凸模外退沒時立刻產生</span><span>,</span><span style="font-family:宋體;">有時非在拉深變形先蒙碰打或者振靜時發(fā)熟</span><span>;</span><span style="font-family:宋體;">也有時在拉深變形先經由一段時光的寄存或者在應用進程中才發(fā)作。</span> </p> <p class="MsoNormal"> <span></span> </p>