专利信息

碳化钨基轧钢用导位尖的制造　本发明涉及一种碳化钨基轧钢用导位尖的制造,该导位尖由碳化钨粉、钨粉、铜粉、镍粉四种粉体相混合,压制成线材、圆钢生产线所需导位尖形状,在1340℃±10℃氢气保护气氛炉中烧结,再在1260℃±10℃下渗铜。所制备的导位尖具有高的强度,高温耐?..     

专利文摘

专利申请号 :９５１０３０４１公开号 :１１３２２５８授权公告号 :１０５６１９５发明名称 :碳化钨基轧钢用导位尖的制造文摘 :本发明涉及一种碳化钨基轧钢用导位尖的制造 ,该导位尖由碳化钨粉、钨粉、铜镍四种粉体相混合 ,压制成线材、圆钢生产线所需导位尖形状 ,在１３４０℃±１０℃氢气保护气氛炉中烧结 ,再在１２６０℃±１０℃下渗铜。所制备的导位尖具有高的强度 ,高温耐磨且不炸裂不粘氧化铁皮的优越性。该导位尖组成表达式为 :ＷＣａＷｂＣｕｃＮｉｄ ,式中ａ、ｂ、ｃ、ｄ分别代表碳化钨（ＷＣ）、钨（Ｗ）、铜（Ｃｕ）、镍（Ｎｉ…     

高铬铁基烧结材料的研究

研究了Fe-13Cr-1Mo-C材料的制造工艺和性能。结果表明,在真空及适当烧结温度下,可实现烧结致密化,材料密度>7.3g/cm3,淬火态硬度可达到76HRA以上。     

合金化Fe-Mo-Ni-Cu-C烧结硬化钢性能研究

以Fe-Mo预合金粉为基粉,通过添加合金元素Ni、Cu,经820℃部分扩散制成Fe-Mo-Ni-Cu部分扩散合金粉,应用粉末冶金技术制备了Fe-Mo-Ni-Cu-C烧结硬化钢,对该材料的组织结构和物理机械性能进行了研究。实验结果表明:烧结硬化钢材料在烧结后期于氢气保护下直接冷却,不需要单独淬火,随冷却速度不同,Fe-Mo-Ni-Cu-C烧结硬化钢的主要金相组织为回火马氏体、珠光体和下贝氏体。合金元素Mo、Ni、Cu的加入改善了材料的组织,大幅度提高了材料的强度和硬度。材料硬度:HRC 50,拉伸强度:σb936 MPa,冲击韧性:23.6 J/cm2,密度:7.23 g/cm3。     

铁基温压烧结材料性能

研究了烧结密度、合金元素及其含量对铁基温压烧结材料性能的影响。结果表明, 温压铁基合金材料强度和硬度随着密度的增加不断上升。不同Ni含量的Fe xNi 0.5Mo 1Cu 0.5C(x=1.5、2、2.5、3、4)系合金的密度增加到7.45 g/cm3 左右时, 其烧结强度和硬度分别达到1 225~1 389 MPa和HB200~HB350。不同Cu含量的Fe xCu 0.5C(x=1、2、3)系合金的密度增加到7.45 g/cm3 左右时, 其烧结强度和硬度分别达到1 000~1 114MPa、HB150~HB200。Ni、Mo等合金元素具有优异的烧结强化效果。     

机械球磨与烧结W基材料的组织与性能

采用机械球磨与热压工艺制备了W-TiC、W-Ni、W-CNTs(碳纳米管)和W-Ni-CNTs 4种W基材料。研究结果表明,机械球磨能显著降低复合粉的晶粒尺寸和增加晶格畸变。经机械球磨后热压的样品中W-TiC的致密度最好,密度达到18.36g/cm3;W-Ni和W-CNTs的密度分别为17.97g/cm3和18.23g/cm3,具有较好的致密性;W-Ni-CNTs样品密度为15.84g/cm3,致密度略低。微观组织分析表明:添加TiC粒子可以显著改善材料的烧结行为,但晶粒较大;添加少量Ni制备的样品,不仅致密度高,而且晶粒较小;添加CNTs可以改善W的烧结行为,同时能够抑制晶粒长大和对W晶界起到强化作用;同时添加Ni和CNTs样品的致密度较低,需要对Ni和CNTs的添加量及烧结工艺条件进一步优化。结合微观组织分析与显微硬度测试结果,发现W烧结体的显微硬度不仅和材料密度有关,而且和W晶粒大小及掺杂相有关。     

热压烧结制备Li3/8Sr7/16Ta3/4Hf1/4O3钙钛矿型固体电解质

采用热压烧结制备了Li_3/8Sr_7/16Ta_3/4Hf_1/4O₃钙钛矿型固体电解质, 研究了不同烧结方式对样品性能的影响。通过X射线衍射仪表征材料的晶体结构, 扫描电子显微镜观察组织形貌, 交流阻抗仪测试电化学性能。结果表明:样品为立方KTaO₃相, 热压烧结成功合成了钙钛矿结构固体电解质, 相对于常压烧结, 热压烧结制备的样品孔隙更少, 晶粒之间结合更加紧密, 致密度高达94.0%, 离子电导率为4.33×10-4S·cm(T=298K).      

622镍钴锰酸锂三元材料的掺Al改性研究

试验采用高温固相法经二次烧结合成622三元正极材料.研究在烧结时间、烧结温度不变的情况下,探究不同Al掺杂量对622三元正极材料性能的影响.试验结果显示,Al添加量为0.5％,622三元正极材料的综合性能最佳.此时622三元正极材料的振实密度为2.62 g/cm3,粒度为10.58μm,容量为167.12 mAh/g,...     

粉末冶金软磁材料在XC型仪表中的应用

介绍了粉末冶金软磁材料在制造XC型仪表零件中的应用及其技术经济效果。采用动压、氢气保护烧结、复压工艺,其密度 ≥ 7g/cm3,所制零件完全满足产品装配要求。其经济效果显著,以年产8万台计算,与用DT4纯铁棒加工(材料利用率40%)相比,全年可节约原材料费6万元,节约加工费12万元。粉末冶金软磁材料完全可以在仪表零件制造中推广应用。     

先进粘结剂处理的FY-4500

在纯铁中用磷作为合金化元素的好处已得到证明.这些好处包括提高直流磁性能,提高烧结密度及力学性能.铁中加入合金元素磷的一个主要缺点是模具易于磨损.用一种先进的粘结剂处理方法,在用传统粘结剂处理的预混粉烧结体密度＜7.0 g/cm3和使用温压烧结体密度＞7.2 g/cm3的材料的试验中,观察到脱模力与滑动力减低.这种脱模力...     

熔炼次数对M17返回料合金成分、组织和性能的影响

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。     

Shijiazhuang will Build the World's Biggest Replacingcopper-with-aluminum Cable Production Base

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.     

Chongqing is Preparing to Set Up Nonferrous Metal Exchange,in a Bid to Become the Transit Place of Kazakhstan Copper

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     

Guangxi Baise Extends Industrial Chain to Combat Loss in Aluminum Business

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     

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL ANNUAL CONTENTS Volume 21(2014)

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Chinalco Straightened Out Copper Assets,and Delegated Stock Equity of Yunnan Copper

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     

The Development and Reform Commission Encourages Private Capital to Enter Geological Prospecting Field

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.     

Guangxi's first Nickel Industry Development Research Report Was Released

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     

China’s Major Non-ferrous Metals Imports & Exports(End of September. 2014)

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China's Major Non-ferrous Metals Imports & Exports

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