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b与熔炼工艺有å…?</p> <p> 2)压铸过程中卷入气体a与压铸工艺参数有å…?b与模具结构有å…?</p> <p> 3)脱模剂分解产生气体a与涂料本身特性有å…?b与喷涂工艺有å…?</p> <p> ï¼?)原材料及熔炼过程产生气体分æž?</p> <p> 铝液中的气体主要是氢,约占了气体总量çš?5%ã€?</p> <p> 熔炼温度越高,氢在铝液中溶解度越高,但在固态铝中溶解度非常低,因此在凝固过程中,氢析出形成气孔ã€?</p> <p> 氢的来源ï¼?</p> <p> 1)大气中水蒸气,金属液从潮湿空气中吸氢ã€?</p> <p> 2)原材料本身含氢量,合金锭表面潮湿,回炉料脏,油污ã€?</p> <p> 3)工具、熔剂潮湿ã€?</p> <p> ï¼?)压铸过程产生气体分æž?</p> <p> 由于压室、浇注系统、型腔均与大气相通,而金属液是以高压、高速充填,如果不能实现有序、平稳的流动状态,金属液产生涡流,会把气体卷进去ã€?</p></p> </div> <div class="pagess"> <ul><div>上一æ?<a href="311.html">【原创】你知道各项操作规程对最后效果的影响吗_压铸机的选用步骤是什ä¹?/a></div> <div>下一æ?<a href="309.html">【图】精密铸件的热处ç?低压浇铸过程中常见的问题</a></div> </ul> </div> <div class="info_key">相关标签ï¼?/div> </div> <div class="clear"></div> <div class="cateslist"> <dl> <dt>相关产品</dt> <dd> <div class="img"> <a href="/supply/22.html" title="自来水工程阀é—? rel="nofollow"><img src="http://cmsimgshow.zhuchao.cc/30636/201709211104042203063624435.jpg?path=www.0eo6gab.cn/uploads/cp/201709211104042203063624435.jpg" title="自来水工程阀é—? alt="自来水工程阀é—?/></a> </div> 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