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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">SiCp/Al复合材料精密加工方面取得重要进展 </h1> <p class="xg1"> 时间：2018-5-7 10:06<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(515)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=6577&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>SiCp/Al复合材料具有高比强度和比模量、耐磨损、热导率高、尺寸稳定等一系列优点，已成为铝合金、部分钛合金、铍合金的最佳替代材料，在航空、航天、光学仪器、电子工业等领域具有十分广阔的应用前景。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><p style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-family: 宋体; font-size: 10.5pt; color: rgb(70, 70, 70); background-color: rgb(255, 255, 255);"><span style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;"> SiCp/Al<font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">复合<a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>具有高比强度和比模量、耐磨损、热导率高、尺寸稳定等一系列优点，已成为铝合金、部分钛合金、铍合金的最佳替代材料，在航空、航天、光学仪器、<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>工业等领域具有十分广阔的应用前景。随着高体积分数</font><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">SiCp/Al</font><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">复合材料在这些领域的应用，对其精密、超精密<a href="http://optics.oecr.com" target="_blank" class="relatedlink">加工</a>技术，特别是提高表面质量的加工方法及机理研究提出了迫切需求。</font></span> </p><p style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-family: 宋体; font-size: 10.5pt; color: rgb(70, 70, 70); background-color: rgb(255, 255, 255);"> <span style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;"><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">光电所某航天项目上的核心零部件采用了</font>SiCp/Al<font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">复合材料，精度要求极高，是对现有加工能力的一个挑战。该材料在宏观上可看作是均匀的、各向同性的多相材料，但微观上又是非均质的、各向异性的。</font><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">SiC</font><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">颗粒无方向性、不连续地分布在软质铝基体中，切削时，材料内部应力分布不均匀，铝基体发生弹性变形和塑性变形，而</font><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">SiC</font><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">颗粒只发生弹性变形，其含量、形状、尺寸和分布对刀具的磨损形态、已加工表面的形貌和粗糙度起着决定性的作用。</font></span> </p><p style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-family: 宋体; font-size: 10.5pt; color: rgb(70, 70, 70); background-color: rgb(255, 255, 255);"> <span style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;"><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">针对这些难题，光电所精制中心复合材料加工攻关团队通过多次实验和分析，探讨影响零件表面完整性的各类因素（如刀具材料、刀具几何角度、切削速度、进给量、吃刀量、切削液等），找出影响表面完整性和精度的主要因素（如采用何种切削参数可以实现</font>SiC<font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">颗粒的塑性去除等），以及它们之间的关系，最终制定切实可行的加工<a href="http://optics.oecr.com" target="_blank" class="relatedlink">工艺</a>方案，完成零件尺寸精度控制在</font><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">0.002mm</font><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">、形位精度</font><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">0.002mm</font><font style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-size: 10.5pt;">，部分零件的形位精度达到了亚微米级，解决了铝基碳化硅材料的精密加工工艺难题，实现了该材料在关键承载结构件领域的应用。</font></span> </p><p style="text-align: center;"><a href="data/attachment/portal/201805/07/100627kzq363rxxxlqfizf.jpg" target="_blank"><img src="data/attachment/portal/201805/07/100627kzq363rxxxlqfizf.jpg"></a></p><p align="center" style="margin-top: 0px; margin-bottom: 12px; line-height: 1.8; font-family: 宋体; font-size: 10.5pt; color: rgb(70, 70, 70); background-color: rgb(255, 255, 255);"> <span 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id="comment_17130_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(17130, '6577');">引用</a> </span> <a href="http://club.oecr.com/space-uid-49701.html" class="xi2 xw1" c="1">zrd0001</a> <span class="xg1 xw0">2018-5-7 21:06</span> </dt> <dd>希望找到同行。</dd> </dl><a name="comment_anchor_17123"></a> <dl id="comment_17123_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(17123, '6577');">引用</a> </span> <a href="http://club.oecr.com/space-uid-61919.html" class="xi2 xw1" c="1">eulerr</a> <span class="xg1 xw0">2018-5-7 17:36</span> </dt> <dd>占坑编辑ing</dd> </dl><a name="comment_anchor_17120"></a> <dl id="comment_17120_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(17120, '6577');">引用</a> </span> <a href="http://club.oecr.com/space-uid-15275.html" class="xi2 xw1" c="1">flyheart</a> <span class="xg1 xw0">2018-5-7 17:06</span> </dt> <dd>光电工程师社区 不错</dd> </dl><a name="comment_anchor_17105"></a> <dl id="comment_17105_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(17105, '6577');">引用</a> </span> <a href="http://club.oecr.com/space-uid-45319.html" class="xi2 xw1" c="1">wtp53</a> <span class="xg1 xw0">2018-5-7 10:06</span> </dt> <dd>看得懂，挺好。</dd> </dl></div> </div> <!--[diy=diycontentcomment]--><div id="diycontentcomment" class="area"></div><!--[/diy]--> </div> <div class="sd pph"> <div class="drag"> <!--[diy=diyrighttop]--><div id="diyrighttop" class="area"><div id="frameZRVHza" class="sy_ltdr frame move-span cl frame-1"><div class="frame-title title"><span class="titletext">社区成员推荐</span></div><div id="frameZRVHza_left" class="column frame-1-c"><div id="frameZRVHza_left_temp" class="move-span temp"></div><div id="portal_block_905" class="cl_block_bm block move-span"><div 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