摘要：<span>西安304</span><span style="font-family:宋體;">不銹鋼板折彎加工的特點(diǎn)</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(qiáng)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(qiáng)度高</span><span>,</span><span style="font-family:宋體;">因此能夠抗火災(zāi)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?yàn)椴槐乇砻嫣幚?lt;/span><span>,</span><span style="font-family:宋體;">所以簡便、維護(hù)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(xué)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(rèn)</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(huì)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(diǎn)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(yīng)顯著</span><span>,西安304</span><span style="font-family:宋體;">不銹鋼板進(jìn)行折彎時(shí)其特點(diǎn)如下</span><span>:</span><span style="font-family:宋體;">因?qū)嵝员绕胀ǖ吞间摬?lt;/span><span>,</span><span style="font-family:宋體;">延伸率低</span><span>,</span><span style="font-family:宋體;">導(dǎo)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(shí)與碳鋼相比有強(qiáng)烈的回彈傾向</span><span>;</span><span style="font-family:宋體;">不銹鋼板相對(duì)于碳鋼由于延伸率低</span><span>, </span><span style="font-family:宋體;">折彎時(shí)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(xiàn)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(yīng)顯著因此在選擇壓彎刀具時(shí)要選擇熱處理硬度應(yīng)達(dá)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(gè)數(shù)量級(jí)。</span> </p> <p class="MsoNormal"> <span style="font-family:宋體;">根據(jù)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(shè)備時(shí)折彎力的裕量應(yīng)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(qiáng)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(yīng)該越大。</span> </p> <p class="MsoNormal"> <span style="font-family:宋體;">根據(jù)實(shí)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(gè)板厚</span><span>,</span><span style="font-family:宋體;">完全可以滿足設(shè)計(jì)精度要求</span><span>,</span><span style="font-family:宋體;">根據(jù)經(jīng)驗(yàn)公式計(jì)算展開量可簡化計(jì)算過程大大提高生產(chǎn)效率</span><span>;</span><span style="font-family:宋體;">材質(zhì)的屈服強(qiáng)度越大</span><span>,</span><span style="font-family:宋體;">彈性回復(fù)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(shè)計(jì)的越小。相對(duì)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(diǎn)應(yīng)特別注意否則會(huì)出現(xiàn)壓彎裂紋</span><span>,</span><span style="font-family:宋體;">影響工件強(qiáng)度。無時(shí)非在該拉淡件由凸模外退沒時(shí)立刻產(chǎn)生</span><span>,</span><span style="font-family:宋體;">有時(shí)非在拉深變形先蒙碰打或者振靜時(shí)發(fā)熟</span><span>;</span><span style="font-family:宋體;">也有時(shí)在拉深變形先經(jīng)由一段時(shí)光的寄存或者在應(yīng)用進(jìn)程中才發(fā)作。</span> </p> <p class="MsoNormal"> <span></span> </p>