This thesis reports some results on the hot press sintering of nano - composite wc - co powder , which is prepared by spray pyrogenation & continuous deoxidization and carbonization process 本课题采用热压烧结技术对以喷雾热解?连续还原碳化法制备的纳米复合wc - co粉末进行了热压烧结研究。
As an important branch of rapid prototyping ( rp ) , direct laser metal sintering ( dlms ) is used for manufacturing metal parts by scanning metal powder based on the process of selective laser sintering ( sls ) 直接激光金属烧结技术基于选择性激光烧结快速成形工艺机制,采用粉末逐点熔化的扫描方式,对金属粉末材料进行直接激光烧结成形制备金属零件。
The best aluminum borate whisker preform fabrication process without any binder of superior quality magnesium matrix composite is presented by studying whisker washing ; whisker distribution ; preform taking shape ; preform drying and preform calcined technique 通过对没有任何粘接剂的硼酸铝晶须，从晶须的清洗、晶须的分散、预制块成型、预制块烘乾及预制块烧结技术方面进行了研究，提出了获得用于制备镁基复合材料的硼酸铝晶须预制块的制备工艺。
The result of those studies as follow : ( 1 ) an composite layer of definite thickness on the casting was gained by cast - sintering technique , and it has well wear - resistance . ( 2 ) the reinforcement of the composite layer is tic or vc , which was exiguous and is well distributed 同时利用干滑动摩擦磨损实验，对表面复合层的耐干滑动摩擦磨损的性能进行了研究。研究表明： ( 1 )利用铸造烧结技术可以在铸件表面获得一定厚度耐磨性能良好的表面复合层。
The age hardening characteristic of as - cast cu20ni20mn and cu20ni35mn alloys and the interface characteristic between the alloy and cast tungsten carbide were studied , and on the basis of this study , composites of cu - ni - mn alloy reinforced with different volume fraction ( 0 - 45vol . % ) and different size ( 42 - 362 m ) of cast tungsten carbide particles were made by vacuum hot - pressing liquid sintering technology . pin on disk two body abrasion tests have been performed with different size of sic abrasive under different loads 本文研究了铸态cu20ni20mn和cu20ni35mn合金的时效硬化特性及其与铸造碳化钨的界面特性，并在此基础上以不同尺寸( 42 362 m )的铸造碳化钨颗粒为增强体，采用真空热压液相烧结技术制备了不同颗粒含量( 0 45vol . )的铸造碳化钨颗粒增强cu - ni - mn合金基复合材料；以不同粒度的sic为磨料，在不同载荷条件下利用销?盘磨损试验机测试了复合材料的二体磨料磨损性能。
Abstract : the newest mannfacturing , sintering technology on superfine and nanom eter hardmetal powder , manufacturing technology of cemented carbide , as well as re covery technique on tungsten materials and hardmetal wastes were comprehensively expounded in this paper and the reference proposals on hardmetal ' s developing trends , application prospects and environment problems were also put forward 文摘:综合评述了第八届国际钨讨论会关于硬质合金领域的超细、纳米级粉末制造技术、烧结技术、硬质合金制造技术以及钨材料和硬质合金废品的回收利用技术，并对硬质合金的发展趋势、前景应用等新动向及环境问题提出了参考性建议。
The experiments showed that wc and vc can dissolve mutually in the carbonizing reaction . when wc ' s content exceeds vc ' s , vc will dissolve into wc and make wc ' s crystal lattice bring aberrance and become wc1 - x , contrarily when vc ' s content exceeds wc ' s , wc will dissolve into vc and also make vc ' s crystal lattice bring aberrance . the surface cermet composite has high rigidity and well wear - resistance ( 7 )采用铸造烧结技术，通过加入毗颗粒和v班一vc的原位放热反应成功制取了碳化物陶瓷质量百分数超过60 %的表面金属陶瓷材料，实验证实wc与高温碳化反应生成的vc相互可以很好的固溶，当wc的含量超过vc时， vc可以固溶到wc中，使wc的晶格发生畸变，成为昵卜: ，反之当vc的含量超过wc的含量时， wc可以固溶到vc中，也会造成vc的晶格畸变。
Pulse electric current sintering is an advanced technology for materials synthesis and one of effective methods for preparation nano - structure ceramic . but the sintering mechanism is different with traditional sintering method . the sintering phenomena of oxide nano - powders have been investigated in this paper 放电等离子体烧结技术( sps )是材料制备新技术之一，也是制备纳米相陶瓷的有效方法之一，但烧结金属氧化物纳米粉末过程中的致密化机理与传统理论有一定的区别，本文对脉冲电流烧结金属氧化物纳米粉末进行了系统研究。
Rapid prototyping technology changed the traditional pattern of product design , which could offer product sample for the designer , reduced design cycle and quicken the schedule of new product design , and it gave the decision - makers visual feeling . ; rp technology provided kinds of molds including resin - boncled mold laminate mold , investment mold and lost foam casting mold and so on for sand casting investment casting and cavityless casting , it could also use direct shell production casting to make pattern dies metal dies die - casting dies injection dies directly , and it could even produce casting products in small scales . the applications of fdm technology in plaster precision casting and the rapid casting technology based on sls technology were introduced , the organic combination between rapid prototyping tecnnology and foundry process , which initiated a new period of rapid manufacturing metal parts , by using advanced new technology alternated traditional foundry industry to make it looked brand - new , thus , the competition of foundry industry would be improved ; rapid prototyping technology offered a rapid economical feasible technical method , common processes of using rapid prototyping technology to produce dies were discussed , in the paper it explored that . the problem of combining rapid prototyping technology with electric arc metal - spraying technology to make metal dies and technics in dies manufacturing of combining rapid prototyping technology with precision casting , rapid tooling based on rapid prototyping , integrated advanced new technology and tradition technology of rapid prototyping manufacture , each superiority were exerted , rapid prototyping technology had been an efficiency measure to rapid update products and develop new product , and to middle - 快速成型技术改变了传统的产品开发模式，可以为设计者提供产品样件，缩短设计周期，加快新产品的开发进度，为决策者提供直观性；快速成型技术迅速提供砂型铸造、熔模铸造、实型铸造用的各种模样，包括树脂模、层压模、熔模和消失模等，还可采用直接制壳铸造法直接制造熔模铸造用的压型、金属型、压铸型、注塑模，甚至直接制造小批量铸件，介绍了熔积成型技术在石膏型精密铸造上的应用和基于选择性激光烧结技术的快速铸造技术，快速成型技术与铸造工艺的有机结合，开创了快速制造金属零件的新阶段，对用高新技术改造传统的铸造工业，使其面貌焕然一新，增强铸造行业的竞争能力；快速成型技术为母模的制造提供了一条快速、经济、可行的技术途径，讨论了利用快速成型技术制造模具的一般工艺方法，探讨了将快速成型技术与金属电弧喷镀技术结合起来快速制造金属模具问题，以及快速成型技术与精密铸造技术相结合的模具制造工艺，基于快速成型制造的快速模具技术，集成了快速成型制造高新技术和传统技术，发挥各自优势，已成为产品快速更新换代和新产品开发及中、小批量生产的有效手段之一。
The iron covered silicon powder was fabricated separately by the milling method and the mixing method . treated separately at 500 , 600 , 700 , 800 , 900 and 1000 for 1 minute , the iron silicon alloy bulk was attained . it also found that the density of the bulk was enhanced by the boost of the treated temperature 实验分别采用球磨法和混料法制备铁硅包覆粉末，采用放电等离子烧结技术分别在500 ， 600 ， 700 ， 800 ， 900 ， 1000保温一分钟进行处理，得到铁硅合金块体，研究发现，随着处理温度的提高，块体的致密度随之增加，显微结构的分析表明，块体基本保持了包覆粉末原始自然状态。
