·180· 北京科技大学学报 2002年第2期 3卢寿慈.粉体加工技术[M.北京：中国轻工业出版 径对WC粉化合碳的影响U】.北京科技大学学报， 杜，1999 2000,22(6):536 4盖国胜.超细粉碎分级技术M北京：中国轻工业出 6王新国，朱凯荪.碳吸附铁精矿粉流态化预还原的数 版社，1999 学模型[円.北京科技大学学报，2000,22（增刊）：114 5宴洪波，张丽英，徐晓娟，等.超细钨粉碳化时碳黑粒 7HG/TXXX-2001.粉末硫化橡胶.2001 Experimental Study on Physicochemistry Method for Fine-grade Rubber Power and Its Microstructure Property WANG Kaikun,KANG Yonglin,ZHU Zhenghe) 1)Material Science and Engineering School,UST Beijing,Beijing 100083,China 2)Nanjing University of Aeronautics and Astronautics,Nanjing 210006,China ABSTRACT A new physicochemistry method for producing fine-grade rubber power is introduced.The main factors influencing the effective time in producing fine-grade rubber power are also discussed.The ex- perimental results show that the grade of rubber powder produced with physicochemistry method is much fin- er than that with conventional method.Prolonged grinding time,increased ratio of rubber-power/agent and decreased filling volume can lead to fine-grade rubber powder.The results also show that the mechanical pro- perties of rubber powder by physicochemistry method are superior to that by conventional one,the tensile strength for 60-80 mesh grade rubber powder is the lowest,and for 140-200 mesh grade being the highest. KEY WORDS fine-grade rubber power;grade;physicochemistry method;elongation coefficient;tensile strength 冬来章染衣幸*条来女鉴米海泰米*本条染来本海※来海衣海来来净本海染业米来卷泰本本章茶米海率海米泰米冷米茶本海冰旅秦素冷孝本孝*海冰衣米本米*米孝米海孝炸孝本农来染# (上接第176页) RPC Processing Optimizing to Refine Bainite WANG Xuemin,SHANG Chengjia,YANG Shanwu,HE Xinlai,HAN Wenhai Materials Science and Engineering of School,UST Beijing,Beijing 100083,China ABSTRAC The influence of Relaxation-Precipitation-Controlling Transformation(RPC)technique on the microstructure of low carbon steels was studied by thermal simulation.The results indicated that the ultra- fine bainite/martensite composite microstructure was obtained.With the strain increasing the refinement was promoted.As the final rolling temperature increases the refinement was hindered.When the precipitation speed during relaxing is comparable to the dislocation evolution rate,the best processing is obtained. KEY WORDS precipitation;RPC technique;microstructure refining;deformation temperature'strain一 1 8 0 - 北 京 科 技 大 学 学 报 20 02 年 第 2期 卢寿 慈 . 粉体加工 技术 [M l . 北 京 : 中 国轻 工业 出版 社 , 1 999 盖 国胜 . 超细 粉碎 分级 技术【M ] . 北 京 : 中国轻工 业 出 版社 , 1 9 9 9 宴洪波 , 张丽 英 , 徐晓娟 , 等 . 超 细钨 粉碳化时碳黑粒 径 对 w C 粉 化合 碳 的影响 1[J . 北 京科 技 大学学 报 , 20 00 , 2 2 ( 6) : 53 6 6 王新国 , 朱凯 荪 . 碳吸附铁精矿粉流态 化预还 原 的数 学 模型 [ J ] . 北 京科技大学 学报 , 2 0 0 0 , 2 2 (增 刊 ) : 1 1 4 7 H G 汀 X X X 一 2 00 1 . 粉末 硫化橡胶 . 2 0 0 1 E xP e r im e n t a l S ut 勿 o n P妙 s i c o e h e m i s ytr M e ht o d fo r F i n e 一 g r a d e R刀 bb e r P o w e r an d It s M i e r o s trU e 俪 e P r o P e yrt 恻刀G aK iku nl), 删万 G oY喇 iln 气 Z仔 U hZ e n g h砂 l )M at er i al S e i en e e an d E n gin e emr g S e h o o l , U S T B e ij in g , B e ij ing 10 0 0 8 3 , C h in a 2 )N anj i gn U n iv e rs ity o f A e r o n aut i e s an d A s otr n a u t l e s , N anj ign 2 10 0 0 6 , C h in a A B S T R A C T A n e w Phy s i e o e h e m i s try m e ht o d ofr Pr o du e in g if n e 一 gr a d e ru b b e r Po w er 1 5 i n t r o du e e d . hT e m a in af c t o r s i n fl u e n e i n g ht e e fe e it v e t im e i n P r o du e ign if n e 一 gr a de ru b b e r P o w e r ar e a l s o id s e u s s e d . hT e e x - Pe r im e n t a l re s ult s s h o w ht at ht e gr a d e o f ru b b e r Po w d e r Pr o du e e d w iht P勿 s i e o e he m i s try m e ht o d i s m u e h if n - e r ht an ht at w iht e o vn e nt i o n a l m e t h o d . 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A s t h e if n a l r o llign te m P e r a t u r e icn re a s e s ht e r e if n em e in w a s h i n d e r e d . W h e n ht e P r e e i Pit iat o n s P e e d d u r i n g r e lax i n g 1 5 e om Par a b l e t o t h e id s l o e at i o n e v o lut i o n r at e , ht e b e s t P r o e e s s i n g 1 5 o bt a i n e d . K E Y W O R D S Per e iPit a t i o n ; RP C t e e hn iq u e : m i e or s t ur c t ur e er if n i n g : d e fo rn l at ion t e m Pe r a t u r e , s atr i n