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Cast aluminum platform, cast steel platform, cast iron platform, marble platform, Beizhong is the first choice for machine tool castings

total supply
20 块
MOQ
1 块
brand
北重
area
HebeiCangzhou City
Delivery period:
Shipped within 20 days from the date of payment by the buyer
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area:Hebei Cangzhou City

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Botou Beizhong Machinery Manufacturing Co., Ltd.

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Product Details
长:
100-6000mm
宽:
100-4000mm
铸铝平台,铸钢平台,铸铁平台,大理石平台,机床铸件首选北重
铸铝平台又叫做铸铝平板。铸铝件的成本低、工艺性好、重熔再生节省资源和能源,所以这种材料的应用和发展持久不衰.铸铝件常见缺陷及分析一、氧化夹渣缺陷特征氧化夹渣多分布在铸件的上表面,在铸型不通气的转角部位。断口多呈灰白色或黄色,经x光透视或在机械加工时发现,也可在碱洗、酸洗或阳极化时发现。
产生原因:1.炉料不清洁,回炉料使用量过多2.浇注系统设计不良3.合金液中的熔渣未清除干净4.浇注操作不当,带入夹渣5.精炼变质处理后静置时间不够。
防止方法:1.炉料应经过吹砂,回炉料的使用量适当降低2.改进浇注系统设计,提高其挡渣能力3.采用适当的熔剂去渣4.浇注时应当平稳并应注意挡渣5.精炼后浇注前合金液应静置一定时间。
二、气孔气泡缺陷特征三铸件壁内气孔一般呈圆形或椭圆形,具有光滑的表面,一般是发亮的氧化皮,有时呈油黄色。表面气孔、气泡可通过喷砂发现,内部气孔气泡可通过X光透视或机械加工发现。
气孔气泡在X光底片上呈黑色产生原因:1.浇注合金不平稳,卷入气体2.型(芯)砂中混入有机杂质(如煤屑、草根马粪等)3.铸型和砂芯通气不良4.冷铁表面有缩孔5.浇注系统设计不良。
防止方法:1.正确掌握浇注速度,避免卷入气体。2.型(芯)砂中不得混入有机杂质以减少造型材料的发气量3.改善(芯)砂的排气能力4.正确选用及处理冷铁5.改进浇注系统设计
三、缩松缺陷特征
铸铝平台件缩松一般产生在内浇道附近飞冒口根部厚大部位、壁的厚薄转接处和具有大平面的薄壁处。
在铸态时断口为灰色,浅黄色经热处理后为灰白浅黄或灰黑色在x光底片上呈云雾状严重的呈丝状缩松可通过X光、荧光低倍断口等检查方法发现。
产生原因:1.冒口补缩作用差2.炉料含气量太多3.内浇道附近过热4.砂型水分过多,砂芯未烘干5.合金晶粒粗大6.铸件在铸型中的位置不当7.浇注温度过高,浇注速度太快。
防止方法:1.从冒口补浇金属液,改进冒口设计2.炉料应清洁无腐蚀3.铸件缩松处设置冒口,安放冷铁或冷铁与冒口联用4.控制型砂水分,和砂芯干燥5.采取细化品粒的措施6.改进铸件在铸型中的位置,降低浇注温度和浇注速度。
四、裂纹缺陷特征
1.铸造裂纹。沿晶界发展,常伴有偏析,是一种在较高温度下形成的裂纹在体积收缩较大的合金和形状较复杂的铸件容易出现2.热处理裂纹:由于热处理过烧或过热引起,常呈穿晶裂纹。常在产生应力和热膨张系数较大的合金冷却过剧。或存在其他冶金缺陷时产生。
产生原因:1.铸件结构设计不合理,有尖角,壁的厚薄变化过于悬殊2.砂型(芯)退让性不良3.铸型局部过热4.浇注温度过高5.自铸型中取出铸件过早6.热处理过热或过烧,冷却速度过激。
防止方法:1.改进铸件结构设计,避免尖角,壁厚力求均匀,圆滑过渡2.采取增大砂型(芯)退让性的措施3.保证铸件各部分同时凝固或顺序凝固,改进浇注系统设计4.适当降低浇注温度5.控制铸型冷却出型时间。6.铸铝件变形时采用热校正法。7.正确控制热处理温度,降低淬火冷却速度
铸铝件铸造轻合金由于具有密度小、比强度高、耐腐蚀等一系列优良特性,将更广泛应用于航空、航天、汽车、机械等各行业。特别是在汽车工业中,为降低油耗提高能源利用率,用铝、镍合金铸件代替钢、铁铸件是长期的发展趋势.
北重厂家生产加工龙门刨铣床,落地式端面铣床,电机试验、机械滑台,铸铁平台、焊接平台、划线平台、装配平台、地轨,T型槽地轨、落地镗床工作台、T型槽工作台、机床工作台等大型铸件和机床量具。公司本着以质量求生存,以信誉求发展的宗旨,集设计、制造、安装调试全方位为新老客户服务,欢迎新老客户洽谈业务,了解更多产品详情。
 
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