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采用卧式挤压机,对AZ31镁合金型材挤压工艺进行了生产跟踪试验研究,确定了AZ31镁合金型材在挤压操作时的最佳挤压筒温度、镁棒温度、模具预热温度和挤压速度。分析了型材产品的力学性能和微观组织结构,结果表明在给定操作工艺下,可得到高强度、细晶粒度、良好塑性和表面光洁的挤压型材。 相似文献
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镁合金由于良好的生物相容性、可降解性和优良的力学性能,而展现出在医疗器械应用上的优越性.以AZ31镁合金为研究对象,研究镁合金细管静液挤压成形新技术,并且开发出一种高强韧AZ31镁合金薄壁细管.结果表明:模具预热温度为300℃,挤压坯料温度200℃,挤压比为17 ~31.5,采用超细石墨-PVC塑料粉制备的静液挤压用传力润滑介质进行静液挤压,获得的细管综合性能最好;挤压管坯组织与挤压前相比,得到明显改善,挤压前平均晶粒粒径为150μm,挤压后平均晶粒粒径<7.0μm;抗压强度由均匀化处理后的210.5MPa提高至挤压后的375.2MPa. 相似文献
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1概况直接冷硬铸造(DirectChillCastihg)对于铝钢板和挤压产品的加工工艺来说,是具有成本竞争能力的先决条件,但尚没有广泛用于镁合金的铸造方面。2001年初奥地利LKR公司研究开发镁合金立式冷硬铸造工艺技术和建立中间试验厂。开发研究工作集中在采用遥控、高劳动生产率、生产高质量产品的安全问题和方便铸造生产方面,开发项目包括从熔炼、合金化、铸造、热处理到最后镁合金型材的挤压的整个工艺路线。对镁合金AZ31的挤压坯料的横截面粒度分布和宏观偏析状况进行了调研,对多腔镁合金挤压型材的机械性能和(微观)低倍组织性能进行了研究,… 相似文献
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通过正向温挤压获得了细晶微观组织的AZ31B镁合金。研究了在310~460℃范围内,应变速率1×10-3~1×100/s下的超塑性流变行为。结果表明,在415℃、1×10-3/s的条件下AZ31B镁合金具有良好的超塑性,最大延伸率可达380%。应变速率敏感指数达到0.47。通过光学显微镜和扫描电镜(SEM)分别观察了AZ31B镁合金在超塑变形过程中的微观组织演变和断口形貌。晶界滑移机制为AZ31B超塑变形的主要机制。 相似文献
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实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。 相似文献
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正Shijiazhuang City will build the world’s biggest replacing-copper-with-aluminum cable production base,the annual output value can reach 100 billion yuan,in the future it will develop replacing-copper-with-aluminum highend industry cluster.This piece of news was learned by the reporter at the Rare Earth highiron Aluminum Alloy[Nonferrous Business Opportunity:Aluminum alloy door]Cable Conductor New Technology Application Seminar held at the provincial capital. 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
正Since the beginning of Chongqing’s upgrading to a municipality directly under the Central Government,Chongqing City has established direct friendly relationship with Almaty,Kazakhstan,and carried out a series of cooperation in commerce and trade,and culture 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正"For each tonne of aluminum being produced,the upstream enterprise on the aluminum industrial chain will suffer loss about 2000yuan."Said Liang Xiao,Deputy Director of Pingguo Industrial Park Management Committee under the Guangxi Baise City,one of the four major aluminum industry bases in China,on August 11.Extending aluminum 相似文献
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正Immediately after the news that Chinalco transferred 58%stock equity of Yunnan Copper Group to its wholly-owned subsidiary China Copper Corporation Limited free of charge was disclosed on July 9,many individual investors couldn’t help but to think:Does it mean China Copper Corporation Limited will assemble assets for overall listing?At present,among main copper business companies under China Copper Corporation 相似文献
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正At the press conference recently held by the National Development and Reform Commission under the theme"Deepen Reform in Investment AuditApproval System",when answering questions from reporters,Huang Min,Director of the Department of Fixed Assets Investment of the National Development and Reform Commission,said that in the future it would continue to intensify efforts in geological prospecting,and actively guide social capital to enter this field. 相似文献
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正Recently,Guangxi Metallurgical Research Institute,a subsidiary of Guangxi Nonferrous Metals Group,completed survey on laterite and related manufacturers in the region,by combining the current development status of laterite both at home and abroad,it compiled Guangxi’s first"Research Report on the Development of Guangxi Nickel Industrial Chain"which adopted laterite as the study subject.This report expounded on the current 相似文献
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