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21. 发明专利

JPS60128201A PRODUCTION OF SINTERED PARTS COATED SURFACE WITH 2ND PHASE 失效
公开(公告)号：JPS60128201A
公开(公告)日：1985-07-09
申请号：JP23371583
申请日：1983-12-13
申请人： HITACHI FUNMATSU YAKIN KK
发明人： TAKEYA YOSHIAKI , OOSAWA MASATO , OZAWA SHIGERU
IPC分类号： B22F1/00
摘要： PURPOSE:To obtain sintered parts which are coated with foil-like powder on the surface an are provided with the characteristic of the coating material by adding the raw material forming the 2nd phase and consisting essentially of the foil- like powder to raw material powder constituting a matrix and sintering the powder. CONSTITUTION:A raw material forming the 2nd phase is added and mixed in the form of foil-like powder to and with the raw material powder for powder metallurgy forming a matrix. The green compact obtd. by compressing such powdermixture is sintered, by which the sintered parts coated with the 2nd phase formed of the foil-like powder on the surface are obtd. The sintered parts having high rust preventiveness or corrosion resistance are obtd. by adding the foil- like powder at 10-50% in the case of using, for example, a ferrous material for the matrix and copper or copper alloy for the 2nd phase. The ferrous sintered parts which have the surface made into a blue copper color, etc. and have high merchandise value in appearance are obtd. by making use of the difference in the color toner between the above-described two materials.

22. 发明专利

JPS6077903A METHOD AND DEVICE FOR MOLDING POWDER 失效
公开(公告)号：JPS6077903A
公开(公告)日：1985-05-02
申请号：JP18566483
申请日：1983-10-03
申请人： HITACHI FUNMATSU YAKIN KK
发明人： SHIYOUBU TSUGINORI , FUNABASHI NOBORU , OOBA TAKESHI
IPC分类号： B22F3/02 , B22F3/035 , B22F5/10
摘要： PURPOSE:To enable uniform profile molding of a sintered mechanical part having a bossed swash plate shape by packing powder corresponding to a boss part into a cavity in the state of sinking a core rod therein then rising the core rod and molding the powder. CONSTITUTION:Powder corresponding to an upper boss part is packed onto the core rod 5 sunk to the required depth in the cavity formed of a die 1, a lower punch 2 and the rod 5. An outside upper punch 4A of the punch divided to inside and outside punches is fitted to the die 1. The rod 5 is then risen to deposit and pack the powder thereon between the same and the punch 4A thereby compressing the powder from above and below. A sintered mechanical part of a swash plate shape having bosses on both sides is molded. The sintered mechanical part having the bossed swash plate shape is thus uniformly profile-molded.

23. 发明专利

JPS6077902A METHOD AND DEVICE FOR MOLDING POWDER 失效
公开(公告)号：JPS6077902A
公开(公告)日：1985-05-02
申请号：JP18566383
申请日：1983-10-03
申请人： HITACHI FUNMATSU YAKIN KK
发明人： SHIYOUBU TSUGINORI
IPC分类号： B22F3/02 , B22F5/10
摘要： PURPOSE:To eliminate the need for additional machining by packing powder corresponding to a boss part into a cavity in the state of sinking a core rod then rising the core rod and molding the powder. CONSTITUTION:Powder corresponding to a boss part is packed onto the core rod 5 sunk to the required depth in the cavity formed of a die 1, a lower punch 2 and the rod 5. The die 1 is then held by the part of the boss diameter by using an outer upper punch 4A of the punch divided to the inside and outside punches. The rod 5 is risen to deposit and pack the powder thereon between the same and the punch 4A. The boss part held to face upward is compressed from above and below to form a sintered mechanical part having the two-step shape in which the difference between the tooth bottom diameter and the boss diameter is smaller or the boss diameter is larger. The sintered mechanical part which does not required additional machining is thus profile-molded.

24. 发明专利

JPS604569A PAINT FOR SHIELDING ELECTROMAGNETIC RADIATION 失效
公开(公告)号：JPS604569A
公开(公告)日：1985-01-11
申请号：JP11247883
申请日：1983-06-22
申请人： HITACHI FUNMATSU YAKIN KK
发明人： DEYAMA SADAO , SAKAI KOUICHI
IPC分类号： C09D5/00 , C09D5/24 , H01B1/20
摘要： PURPOSE:To provide a paint having remarkably improved effect to shield electromagnetic radiation, and to enable the use of a plastic to the casing of electronic apparatus, by using a filler obtained by mixing Ni powder and fine graphite powder at a specific ratio. CONSTITUTION:The objective paint is obtained by mixing a paint made of synthetic resin, etc. with a filler obtained by mixing (A) Ni powder (preferably carbonyl Ni powder having an average particle diameter of

25. 发明专利

JPS5853704B2 JPS5853704B2 - 失效
公开(公告)号：JPS5853704B2
公开(公告)日：1983-11-30
申请号：JP14049779
申请日：1979-11-01
申请人： Hitachi Funmatsu Yakin Kk
发明人： SUZUKI NAOHIRO , ENDO HIROYUKI , ASAKA KAZUO , HAYASAKA TADAO
IPC分类号： B22F1/00 , B22F1/02 , B22F3/02 , B22F3/035 , C22C33/02 , C22C38/00

26. 发明专利

JPS5852526B2 JPS5852526B2 - 失效
公开(公告)号：JPS5852526B2
公开(公告)日：1983-11-24
申请号：JP6949279
申请日：1979-06-05
申请人： Hitachi Funmatsu Yakin Kk
发明人： YOMO HIDEO
IPC分类号： F16C33/14 , B22F3/10 , C22C9/00

27. 发明专利

JPS58157951A SINTERED ALLOY FOR SLIDING MEMBER 失效
公开(公告)号：JPS58157951A
公开(公告)日：1983-09-20
申请号：JP3816882
申请日：1982-03-12
申请人： HITACHI FUNMATSU YAKIN KK
发明人： FUNABASHI NOBORU , YANO TADAYOSHI
IPC分类号： C22C33/02 , B22F5/00 , C22C38/00 , C22C38/16
摘要： PURPOSE:To prevent deterioration in the characteristics of a sintered Fe alloy contg. dispersed graphite and increases in the extent of wear and the coefft. of friction in accordance with use, by forming hardened Fe-Cu layers between the matrix of the alloy and the graphite particles. CONSTITUTION:Hardened Fe-Cu layers 4 having 3-10mum thickness are formed around graphite particles 2 in a sintered alloy having a structure contg. 1-5wt% free graphite 2 dispersed in the ion matrix 1 contg.

28. 发明专利

JPS58141304A PRODUCTION OF DOUBLE LAYERED SINTERED PARTS 失效
公开(公告)号：JPS58141304A
公开(公告)日：1983-08-22
申请号：JP2356982
申请日：1982-02-18
申请人： HITACHI FUNMATSU YAKIN KK
发明人： HIRAI YOSHIKI
IPC分类号： B22F5/00 , B22F7/08
摘要： PURPOSE:To obtain composite materials of good performance having both mechanical rigidity and special characteristics inexpensively by press sticking a powder material having special characteristics on the outside periphery of a core material provided with tooth shapes or rugged parts then sintering the same. CONSTITUTION:Rolling rolls 2a, 2b are disposed on both sides of a core material 1 and some gaps (x), (x) are provided between the rolls and tooth-shaped parts 1' provided on the outside periphery of the material 1. Raw material powder 5 is fed from a feed pipe 4 through a powder chuting feeder 3 provided above the gaps and is dropped between the material 1 and the roll 2b. The rolls 2a, 2b are rotated respectively in directions W, Z, and the powder is filled in the gap (x), by which the material 1 is rotated in a direction Y. Then, the raw material powder is compression molded while the powder is intruded into the parts 1'. When the rolling is continued for a specified time, a green compact 6 of a suitable thickness is formed on the periphery of the material, 1 by press-contacting. The material is sintered by heating, whereby the composite sintered material is obtained.

29. 发明专利

JPS5858709A SINTERED MAGNETIC CORE HAVING HIGH COERCIVE FORCE 失效
公开(公告)号：JPS5858709A
公开(公告)日：1983-04-07
申请号：JP15769781
申请日：1981-10-03
申请人： HITACHI FUNMATSU YAKIN KK
发明人： ASAKA KAZUO
IPC分类号： H01F1/20 , H01F1/08 , H01F1/22
摘要： PURPOSE:To avoid copper expansion at the time of sintering and to increase sintering density and magnetic flux density by a method wherein an adding method of copper for an iron-copper sintering material is applied to copper infiltration for a simple iron sintered body. CONSTITUTION:As to magnetic flux density B25 comparing a pure simple iron sintered body with a body infiltrating copper with the amount becoming 7.5- 7.7g/cm of flux after infiltration into the holes of the sintered body, the former has slightly superior magnetic flux density. However, an almost equal increase in magnetic flux density is recognized as sintering density increases. Performance exceeding 10KG is usually requested, the density of the sintered body meeting the above performance becomes 6.6g/cm or more. Meanwhile, as to coercive force, copper infiltrated body has superior coercive force. More density of a base material rapidly increases cost of production. Furthermore, vital coersive force decreases. Therefore, it is regarded as appropriate that the upper limit of sintering density is limited to 7.4g/cm even if magnetic flux is considered.

30. 发明专利

JPS5839709A PRODUCTION OF COMPOSITE SINTERED PARTS 失效
公开(公告)号：JPS5839709A
公开(公告)日：1983-03-08
申请号：JP13859281
申请日：1981-09-04
申请人： HITACHI FUNMATSU YAKIN KK
发明人： HAYASAKA TADAO
IPC分类号： B22F1/00 , B22F7/06 , C22C33/02
摘要： PURPOSE:To obtain iron-copper-base sintered parts which are firmly joined into one body by combining a green compact provided with boss parts contg. substantially no B and a green compact provided with hole parts contg. B above prescribed ratio, both of which consist essentially of iron and copper respectively and sintering the combined green compacts. CONSTITUTION:Of the above-mentioned two green compacts to be joined, the green compact provided with bosses is of the compsn. contg. essentially of iron and copper and contg. no B or contg. =0.03% B. Both are fitted to each other and are sintered, whereby intended iron-copper-base sintered parts are obtained. In other words, the former expands on progression of sintering for the characteristics of the iron-copper- type green compact, but the latter shrinks by suppressing the copper expansion phenomenon by the effect of B. Since the sintering progresses while the joining surfaces of both are held in tight contact with each other, the iron-copper sintered parts which are firmly joined to one vody are obtained.

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