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src="/uploads/image/20170928/20170928145037_4597.jpg" alt="铔R“åŽ‚家产品的吸气æ€? width="393" height="449" title="铔R“åŽ‚家产品的吸气æ€? align="" /> </p> <blockquote> <p style="text-indent:2em;"> <strong><span style="font-size:16px;">铔R“åŽ‚家</span></strong><span style="font-size:16px;">铝合金易吸收气体åQŒæ˜¯é“”R€ é“åˆé‡‘的主要特性。铸铝厂家液态铝及铝合金的组分与炉料、有机物燃烧产物及铸型等所含水分发生反应而äñ”生的氢气被铝液体吸收所致ã€?/span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;">铔R“åŽ‚家铝合金熔液温度越高,吸收的氢也越多;åœ?00℃时åQŒæ¯100g铝中氢的溶解度äؓ0.5ï½?.9åQŒæ¸©åº¦å‡é«˜åˆ°850℃时åQŒæ°¢çš„溶解度增加2ï½?倍。当含碱金属杂质æ—Óž¼Œæ°¢åœ¨é“æ¶²ä¸­çš„溶解度显著增加ã€?/span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;">铔R“åŽ‚家铔R“åˆé‡‘除熔炼时吸气外,在浇入铸型时也会产生吸气åQŒè¿›å…¥é“¸åž‹å†…的液态金属随温度下降åQŒæ°”体的溶解度下降,析出多余的气体,有一部分é€æ€¸å‡ºçš„气体留在é“怚g内åŞ成气孔,˜q™å°±æ˜¯é€šå¸¸¿U°çš„“针孔”。气体有时会与羃孔结合在一èµøP¼Œé“æ¶²ä¸­æžå‡ºçš„气体留在¾~©å­”内ã€?/span><strong><span style="font-size:16px;">铔R“åŽ‚家</span></strong><span style="font-size:16px;">若气泡受热äñ”生的压力很大åQŒåˆ™æ°”孔表面光滑åQŒå­”的周围有一圈光亮层åQ›è‹¥æ°”æˆö产生的压力小åQŒåˆ™å­”内表面多皱¾U¹ï¼Œçœ‹ä¸ŠåŽÕd¦‚“苍蝇脚”,仔细观察又具有羃孔的特征ã€?/span> </p> <p style="text-align:center;text-indent:2em;"> <span style="font-size:16px;"></span><img src="/uploads/image/20170928/20170928145100_3013.jpg" alt="铔R“åŽ‚家产品的吸气æ€? width="400" height="400" title="铔R“åŽ‚家产品的吸气æ€? align="" /> </p> <p style="text-indent:2em;"> <strong><span style="font-size:16px;">铔R“åŽ‚家</span></strong><span style="font-size:16px;">铔R“åˆé‡‘液中含氢量越高,é“怚g中äñ”生的针孔也越多ã€?a href="/lcp/" target="_blank">铝铸ä»?/a>中针孔不仅降低了é“怚g的气密性、耐蚀性,˜q˜é™ä½Žäº†åˆé‡‘的力学性能。要获得无气孔或ž®‘气孔的铝铸ä»Óž¼Œå…³é”®åœ¨äºŽç†”炼条äšg。若熔炼时添加覆盖剂保护åQŒåˆé‡‘的吸气量大为减ž®‘。对铝熔液作¾_„¡‚¼å¤„理åQŒå¯æœ‰æ•ˆæŽ§åˆ¶é“æ¶²ä¸­çš„含氢量ã€?/span> </p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> <strong><span style="font-size:16px;">铔R“åŽ‚家</span></strong><span style="font-size:16px;">铝合金密度低åQŒä½†å¼ºåº¦æ¯”较高,接近或超˜q‡ä¼˜è´¨é’¢åQŒå¡‘性好åQŒå¯åŠ å·¥æˆå„¿Uåž‹æï¼Œå…ähœ‰ä¼˜è‰¯çš„导甉|€§ã€å¯¼çƒ­æ€§å’ŒæŠ—蚀性,工业上广泛ä‹É用,使用量仅‹Æ¡äºŽé’¢ã€?/span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;">铔R“åŽ‚家铝合金按加工æ–ÒŽ³•å¯ä»¥åˆ†äؓ形变铝合金和铔R€ é“åˆé‡‘两大¾c»ï¼š</span> </p> <p style="text-indent:2em;"> <strong><span style="font-size:16px;">铔R“åŽ‚家</span></strong><span style="font-size:16px;">变åŞ铝合金能承受压力加工。可加工成各¿UåŞ态、规格的铝合金材ã€?/span><strong><span style="font-size:16px;">铔R“åŽ‚家</span></strong><span style="font-size:16px;">主要用于刉™€ èˆª½Iºå™¨æã€å¾½{‘用门窗½{‰ã€‚铸铝厂家åŞ变铝合金又分ä¸ÞZ¸å¯çƒ­å¤„理强化型铝合金和可热处理强化型铝合金。不可热处理强化型不能通过热处理来提高机械性能åQŒåªèƒ½é€šè¿‡å†·åŠ å·¥å˜å½¢æ¥å®žçŽ°å¼ºåŒ–åQŒé“¸é“åŽ‚家主要包括高¾U¯é“ã€å·¥ä¸šé«˜¾U¯é“ã€å·¥ä¸šçº¯é“ä»¥åŠé˜²é”ˆé“½{‰ã€‚可热处理强化型铝合金可以通过淬火和时效等热处理手ŒD‰|¥æé«˜æœºæ¢°æ€§èƒ½åQŒé“¸é“åŽ‚家可分äؓ¼‹¬é“ã€é”»é“ã€è¶…¼‹¬é“å’Œç‰¹ŒDŠé“åˆé‡‘½{‰ã€?/span> </p> </blockquote></p> </div> <div class="newArtiNext mt10"><div>上一æ?<a 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