Vol.22 No.2 林涛等：温压过程致密化机制探讨 ·133· 的影响.粉末冶金工业，1998(4)：7 4黄培云.粉末冶金原理.北京：冶金工业出版社，1982. 3果世驹，林涛.细磷铁粉的制备及其对铁粉温压行为 185 的影响.粉末冶金技术，1997,15(1)：14 5钱祥.润滑剂与添加剂.北京：高等教育出版社，1993.5 Densification Mechanism of Warm Compaction LIN Tao,GUO Shiju,LI Mingyi,WEI Yanping Materials Science and Engineering School,UST Beijing,Beijing 100083,China ABSTRACT Throughout studying the relationship between the compact density and the compacting pressure the compacting temperature,testing the microhardness of particles in the compact,detecting the distribution of lubricant in the compact,the densification mechanism of warm compaction can be concluded as following: the compaction principle of iron powder is the same as that of conventional compaction,while the effective pressure during warm compaction is larger than that of conventional compaction.The temperature during com- paction can slow down the progress of work hardness and improve the plasticity of iron powder.The lubricant is only effective at the optimum temperature.Under this condition,the lubrication takes place of viscous flow, which can be squeezed out of the compact,effectively reducing the friction between particles and between par- ticle and die wall,and also decreasing the ejection pressure. KEY WORDS warm compaction;iron powder;compaction pressure;temperature;lubricant (上接第123页) 3 Baligidad R G,Prokash U,Rao V R,Rao P K,Ballal N B.4 Li Z B.Mechanism of Oxide Inclusions Removal in the Processing of Fe,Al Based Intermerallic Alloys Through ESR Process.In:Proc 9th ICVM on Special Melting, Elecro-slay Remelting.ISIJ International,1996,36:1448 1988.732 Electroslag Refining Processing of Iron-aluminium Based Intermetallic Alloys GAO Dechun,YANG Wangyue,CHEN Chongxi,SUN Zuqing Materials Science and Technology School,UST Beijing,Beijing 100083 ABSTRACT A process route comprising air induction melting(AIM)and electroslag remelting(ESR)for production of Fe,Al based containing Cr alloys has been developed.The effect of melting practice on the purity of elements,inclusions and properties is reported.Proper selection and control of power input during electro- slag remelting resulted in clean,sound,homogenous and defect-free ingots.The content of S,O,H,P in the sam- ples were decreased,and the size and distribution of inclusion were changed.After hot forging and thermo- mechanical process,the longitudinal elongation at room temperature is over 8%and 10%for two kinds of ma- terials,yield strength is over 400 MPa,and ultimate tensile strength is about 700 MPa.It is more possible to melt Fe,Al based alloys by ESR. KEYWORDS iron-aluminide;electroslag refining;air induced melting;mechanical properties】 一 林涛 等 温 压 过程 致密 化机制 探讨 一 的影 响 粉 末 冶金工 业 ， 果世驹 ， 林涛 细 磷 铁粉 的制 备及其 对 铁 粉温压 行 为 的影 响 粉末 冶金 技术 ， ， 黄培 云 粉末 冶 金 原 理 北 京 冶金工 业 出版社 ， 钱祥 ， 润滑剂与添加 剂 北 京 高等 教育 出版社 ， 五石 矶 扩， 舒， 环代 ， ， ， 即 ， ， ， ， ， ， ， ， 倪币 丫曰 带 贷尸 资日 兄币 甸分 匀分 乍币 倪归 两夕 佃夕 口弓沂曰伪夕 马夕 贷尹 卿钾 倪币 匕 倪尸 马曰 、 日 弓听 ， 佗币， 倪币 ， 马日 佃矛 甸夕 倪尸 、 夕 乌夕 又‘ ， 佗币 钩夕 日钩矛 气护 知钾 佗睡曰弓归 渐 ，佗嗬州二丫尹 丫 ， 倪币 ， 佃夕 龟分 月翻夕 句笋 勺夕 上接第 页 ， ， ， ， ， 一 ， ， 一 月 ， 瀚 刀 夕 ， 〔 石咙刀 口刀名戈衣 〔 ， ， 吧 叔 丽 ， ， ， 一 ， ， ， ， ， ， ， ， 勿 一 由 飞