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1. 发明专利

JPH0657396A FORMATION OF HEAT INSULATING THERMALLY SPRAYED LAYER 失效
公开(公告)号：JPH0657396A
公开(公告)日：1994-03-01
申请号：JP23306692
申请日：1992-08-07
申请人： MAZDA MOTOR
发明人： ASAI YASUSHI , TAKESHIGE NOBUHIDE , KAWATO YASUSHI , UOSAKI YASUO
IPC分类号： C23C4/04 , C23C4/12
摘要： PURPOSE:To easily obtain a heat insulating thermally sprayed layer which is uniform, has a high porosity and excellent in the thermal insulation property and, further, to improve the adhesive strength of the boundary between a base layer and the heat insulating thermally sprayed layer and the oxidation resistance, as well. CONSTITUTION:The base layer 11 is formed on a base material 10 and the thermally sprayed layer 12 of fine ceramic powders excellent in the thermal insulation property is formed thereon and further, powders mixed with the ceramic powders excellent in the thermal insulation property and a specific amount of Si3N4 powders is melt-sprayed to form the thermally sprayed layer 13 having a high porosity. The Si3N4 powders in the mixed powders are heated to a high temperature in the plasma-thermal spraying process and then gasified. Consequently, many porosities remain in the thermally sprayed layer 13 formed in the above-mentioned manner developing the thermally sprayed layer having a high porosity and excellent in the thermal insulation property. On the other hand, since the thermally sprayed layer 12 is dense, it tightly adheres to the base layer 11 and excellent in resistance to oxidation, as well.

2. 发明专利

JPH0571349B2 失效
公开(公告)号：JPH0571349B2
公开(公告)日：1993-10-07
申请号：JP21581585
申请日：1985-09-27
申请人： MAZDA MOTOR
发明人： ASAI YASUSHI , SATO KAZUO , OKAZAKI TAKESHI , HANAKAWA KATSUNORI
IPC分类号： B22D47/00 , B22D31/00

3. 发明专利

JPH05169235A METHOD FOR CASTING PLATE-LIKE CASTING 失效
公开(公告)号：JPH05169235A
公开(公告)日：1993-07-09
申请号：JP35602091
申请日：1991-12-20
申请人： MAZDA MOTOR
发明人： UOSAKI YASUO , OMORI MOTOFUMI , ASAI YASUSHI , SHIBAHARA MASAHIKO
IPC分类号： B22C9/04 , B22D27/20 , F16D65/12
摘要： PURPOSE:To manufacture a plate-like cast iron casting having uniform hardness distribution by forming a product cavity in the vertical direction in a mold, connecting a gate at the lower part side of the cavity and arranging an iron- base metal plate surrounding an inoculant near the gate. CONSTITUTION:Explanation is executed in a graphic display based on an example adopting a casting planning of bottom pouring type two piece casting. product cavities 1 are formed in the vertical direction in a mold 2, and gates 3 are connected to the lower part sides of the cavities 1. Materials 9 enclosing the calcium-silicon series inoculant with the iron base metal plate are fitted to near the gates 3. Molten metal is poured from a sprue 5 through a runner 4 and the iron base metal plate is melted at the time when the molten metal runs over the whole cavity, and the inoculant in the inner part is floated up to the opposite side of the gate while reacting from the gate side of the cavity in order. The hardness distribution in the casting manufactured in such way is uniformized.

4. 发明专利

JPH05140700A FERRITIC HEAT RESISTANT CAST STEEL MEMBER AND ITS MANUFACTURE 失效
公开(公告)号：JPH05140700A
公开(公告)日：1993-06-08
申请号：JP32813691
申请日：1991-11-15
申请人： MAZDA MOTOR
发明人： ASAI YASUSHI , TAKESHIGE NOBUHIDE , UOSAKI YASUO , SHIBAHARA MASAHIKO , OMORI MOTOFUMI , MORIMOTO SHIGENORI
IPC分类号： C22C38/00 , C22C38/26 , C22C38/32
摘要： PURPOSE:To obtain a ferritic heat resistant cast steel member excellent in fatigue strength and heat resistance by forming b carbides in combination with carbon, suppressing the formation of coarse Cr carbides and suitably adding Nb for improving heat resistance and boron for refining crystalline grains and suppressing the precipitation of coarse Cr carbides harmful to thermal fatigue. CONSTITUTION:This cast steel member is constituted of, by weight, 0.05 to 0.25% C, 0.3 to 2.0% Si, 0.2 to 1.0% Mn,

5. 发明专利

JPH04135052A MANUFACTURE OF CYLINDER BLOCK 失效
公开(公告)号：JPH04135052A
公开(公告)日：1992-05-08
申请号：JP25809090
申请日：1990-09-26
申请人： MAZDA MOTOR
发明人： ASAI YASUSHI , UOSAKI YASUO , ASAKURA YOJI
IPC分类号： F02F1/00 , B22D19/00 , B22D19/08
摘要： PURPOSE:To improve dimensional accuracy of a cast cylinder block by engaging projecting parts on the circular peripheral face of a liner with recessed parts near the upper and lower ends of a bore core and solidifying a molten metal while allowing the molten metal to go around the gap between the liner and the bore core with the aid of the recessed parts. CONSTITUTION:The bore core 2 is set in a bore of the liner 1 separately formed and by inserting the liner 1 as internal chill, the cylinder block is cast. Then, at side faces near the upper and lower end parts of bore core 2, the upper and lower side recessed parts 2a, 2b are formed. By projecting a part of the inner peripheral face of the liner 1 in the axial direction of liner, the upper and lower side projecting parts 1a, 1b are formed and the projecting parts 1a, 1b are engaged with the recessed parts 2a, 2b. After that, the molten metal is poured into cavity 7 and solidified while allowing the molten metal to go around the gap formed between the liner 1 and the bore core 2 with the recessed parts to cast the cylinder block. By this method, the liner and the inserting material can be firmly joined.

6. 发明专利

JPH03234351A CAST IRON-MADE CYLINDER BLOCK AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH03234351A
公开(公告)日：1991-10-18
申请号：JP3073490
申请日：1990-02-09
申请人： MAZDA MOTOR
发明人： ASAKURA YOJI , ASAI YASUSHI , UOSAKI YASUO
IPC分类号： F02F1/00 , B22D19/08 , C21D5/00 , C22C37/00
摘要： PURPOSE:To secure good workability and to improve wear resistance by making a cylinder block to such structure that a cylinder liner made of flake graphite cast iron having the specific composition of bainite structure is inserted with cast iron base material as internal chill. CONSTITUTION:The flake graphite cast iron-made cylinder liner raw material having bainite structure containing 0.5-2.0wt.% Ni and 0.3-1.5wt.% Mo, is cast. Then, after grinding the cylinder liner 2 by using this cylinder liner raw material, the insertion as internal chill is executed to this with the cast iron base material 4, the cylinder liner raw material before inserting is made to the pearlite structure to make this workability good, and by cooling this after inserting, the structure is made into the bainite, and the strength and wear resistance of cylinder liner 2 are improved.

7. 发明专利

JPH03138065A MANUFACTURE OF CAST IRON-MADE CYLINDER BLOCK 失效
公开(公告)号：JPH03138065A
公开(公告)日：1991-06-12
申请号：JP27606689
申请日：1989-10-25
申请人： MAZDA MOTOR
发明人： UOSAKI YASUO , TAKESHIGE NOBUHIDE , ASAI YASUSHI , MATSUMOTO HIDEKI
IPC分类号： B22D19/00 , B22D19/08
摘要： PURPOSE:To integrate a cylinder liner and an internal chilling material and to strengthen mechanical connection by arranging pouring basin part for molten metal in inner part of bore core at the time of manufacturing a cast iron-made cylinder block. CONSTITUTION:The pouring basin parts 5, 5 are arranged in the bore core part 3 and communicated with a runner 7 through a flowing passage 6 formed in vertical direction in inner part of the core 4. Then, the pouring basin parts 5, 5 are arranged at side part facing to the Y direction in inner circumferential face of the cylinder liner 2, i.e., as approaching position facing to place, where it is difficult to hold at the high temp. after pouring the molten metal. Further, the molten metal for internal chilling material is poured and filled up into a mold M from a sprue 8, and after solidifying, the mold M and core 4 are removed to obtain the cast iron-made cylinder block. Therefore, side part of the liner 2 is heated with radiant heat of the pouring basin parts 5, 5 and the temp. uniformity in the whole circumference of liner 2 is improved and the mechanical connection between the liner 2 and the internal chilling material is strengthened.

8. 发明专利

JPH02138415A PRODUCTION OF FERROUS SLIDING MEMBER 失效
公开(公告)号：JPH02138415A
公开(公告)日：1990-05-28
申请号：JP28988688
申请日：1988-11-15
申请人： MAZDA MOTOR
发明人： ASAI YASUSHI , OKAZAKI TAKESHI , HANAKAWA KATSUNORI
IPC分类号： C21D5/00 , C21D8/00
摘要： PURPOSE:To impart the coefft. of thermal expansion approximate to the coefft. of thermal expansion of an Al alloy to the sliding member and to improve the wear resistance of the sliding member by subjecting the sliding member to an austemper treatment and subjecting the sliding surface to shot peening. CONSTITUTION:The sliding member made of a cast iron is subjected to the austemper treatment to form the structure contg. 50% residual austenite. The sliding surface of this sliding member is subjected to the shot peening at 0.05 to 0.2mm short grain diameter. The transformation of the residual austenite to martensite is suppressed to a lower level in this way and the high surface hardness and sufficient wear resistance are assured. Since many fine recesses are formed on the sliding surface, the sliding characteristic by an oil reserving effect is improved. This sliding member is applicable to all members which make fitting and sliding with the mating member of the Al alloy.

9. 发明专利

JPH01234125A METHOD FOR REMOVING SURFACE FLAW OF CAST MEMBER 失效
公开(公告)号：JPH01234125A
公开(公告)日：1989-09-19
申请号：JP6096088
申请日：1988-03-14
申请人： MAZDA MOTOR
发明人： UOSAKI YASUO , ASAI YASUSHI , OTSUKA AKIRA
IPC分类号： B23P17/00 , B24C1/04 , B24C1/08
摘要： PURPOSE:To surely remove a surface flaw by filling a surface flaw portion produced at a portion of a cast member that is not subjected to after working with an oxidation restrainer, then oxidizing the surface portion of the above portion by heat treatment, and removing scale generating in the above oxidation by shot blast. CONSTITUTION:In an oxidation restrainer filling process, an oxidation restrainer 7 fills up a surface flaw portion 6 of an I portion 2 of a connecting rod raw material (cast article) 1, that is not subjected to after working. In a two-stage annealing process, the connecting rod raw material 1 filled with the above oxidization restrainer 7 is heat-treated, whereby the raw material 1 is subjected to the texture preparation such as graphitization of cementite, distortion is eliminated and simultaneously oxidized scale is generated on the surface. In this case, the surface flaw portion 6 is restrained from being oxidized more than at the other portion, so that the oxidized scale at the surface flaw portion 6 is restrained from being scale at the surface flow portion is thinner than that at the other portion. Accordingly, in a short blast process, iron particles are continuously sprayed to the raw material 1, whereby the oxidized scale can be removed to the surface flaw, so that the surface is made substantially flat.

10. 发明专利

JPH01113150A CASTING APPARATUS 失效
公开(公告)号：JPH01113150A
公开(公告)日：1989-05-01
申请号：JP26876187
申请日：1987-10-24
申请人： MAZDA MOTOR
发明人： ASAI YASUSHI , OKAZAKI TAKESHI , UOSAKI YASUO
IPC分类号： B22C9/04
摘要： PURPOSE:To make structure of a casting closely and to improve strength of a product by holding a mold with backup material composing of metallic grains packed in a vessel and vacuumsucking inner part of the vessel at the time of casting molten metal into the mold. CONSTITUTION:The mold 5 is held with the backup material 4 in the mold chamber 3 and a space chamber 6 is connected with a vacuum pump 7. The mold chamber 3 and the space chamber 6 are communicated through a stainless steel filter 8 and the backup material 4 is composed of large grain diameter steel shot 4a packed at circumference of the product part 5a and small grain diameter steel shot 4b covered at the upper part thereof. At the same time of pouring the molten metal into a mold 5, the vacuum pump 7 is worked. The grains of the large grain diameter steel shot 4a are coagulated dy vacuum sucking and the backup force to the product part 5a in the mold 5 is increased and expanded deformation of the mold 5 at the time of casting is prevented and running of the molten metal is improved. By this method, the good casting having excellent dimensional accuracy without structure defect can be obtd.

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