摘要:
A conventional Bi-containing sliding material sometimes underwent seizing in a sliding part operating at a high rotational speed. The present invention provides a sliding material which does not undergo seizing in a sliding part operating at a high rotational speed and a method for its manufacture. A low melting point alloy containing at least 20 mass % of Bi and having a liquidus temperature of at most 200° C. is made to penetrate into a porous portion comprising a Cu—Sn based alloy. A Bi—Sn based alloy or a Bi—In based alloy is suitable as the low melting point alloy. After a low melting point alloy paste is applied to a porous portion, the low melting point alloy is melted and made to penetrate into the porous portion.
摘要:
A conventional Bi-containing sliding material sometimes underwent seizing in a sliding part operating at a high rotational speed. The present invention provides a sliding material which does not undergo seizing in a sliding part operating at a high rotational speed and a method for its manufacture.A low melting point alloy containing at least 20 mass % of Bi and having a liquidus temperature of at most 200° C. is made to penetrate into a porous portion comprising a Cu—Sn based alloy. A Bi—Sn based alloy or a Bi—In based alloy is suitable as the low melting point alloy. After a low melting point alloy paste is applied to a porous portion, the low melting point alloy is melted and made to penetrate into the porous portion.
摘要:
A sliding material has a sintered layer formed atop a backing plate. The sintered layer contains 5-15 mass % of Bi nonuniformly distributed in a Cu—Sn alloy matrix consisting essentially of 8-12 mass % of Sn and a remainder of Cu. The sliding material can be manufactured by nonuniformly mixing Cu—Sn alloy powder and Bi powder, dispersing the mixed powder on a backing plate, and sintering the mixed powder to form a sintered layer on the backing plate. The sliding material does not undergo seizing and does not have separation of the sintered layer from the backing plate even when used in severe conditions such as in hydraulic equipment or construction equipment.
摘要:
A sliding material has a sintered layer formed atop a backing plate. The sintered layer contains 5-15 mass % of Bi nonuniformly distributed in a Cu—Sn alloy matrix consisting essentially of 8-12 mass % of Sn and a remainder of Cu. The sliding material can be manufactured by nonuniformly mixing Cu—Sn alloy powder and Bi powder, dispersing the mixed powder on a backing plate, and sintering the mixed powder to form a sintered layer on the backing plate. The sliding material does not undergo seizing and does not have separation of the sintered layer from the backing plate even when used in severe conditions such as in hydraulic equipment or construction equipment.
摘要:
A lead-free plain bearing is formed by dispersing an alloy powder formed from 7-13 mass percent of Sn, 0.1-5 mass percent of Ag, and Cu on a backing, such as a steel plate, and sintering. The alloy powder may further include one or more of 0.05-0.5 mass percent of molybdenum disulfide powder and 0.1-2 mass percent of graphite powder. The bearing surface may be rough finished by machining to a roughness of 0.3-1 &mgr;m Ra and then fine finished by polishing to a roughness of at most 0.1 &mgr;Ra.
摘要:
A lead-free journal bearing includes a cylindrical ferrous backing and a bearing alloy layer comprising a bearing alloy powder consisting essentially of 7-13 mass percent of Sn, 0.7-2 mass percent of Ag, optionally at most 0.5 mass percent of molybdenum disulfide, optionally at most 2 mass percent of graphite, and a remainder of Cu sintered to an inner surface of the backing. The bearing is particularly suitable for use in construction equipment.
摘要:
A tom holder has a holder body, a pivoting member supported pivotably with respect to the holder body, and a rod, which projects from the pivoting member with the tom fixed to the rod. The tom holder has a pair of openings located at opposed positions. The tom holder is configured to be usable in either a first mode, in which the rod projects from the first opening, and a second mode, in which the rod projects from the second opening.
摘要:
A hi-hat bottom supports a bottom cymbal, through which a rod is passed, from below in a state fixed to the upper end of an upper pipe via a retainer. The hi-hat bottom has the retainer, a receiving plate, a compression coil spring, and a lock nut. When a foot plate is depressed, the compression coil spring urges a top cymbal and a bottom cymbal in such a direction that the cymbals contact each other. When the foot plate is not depressed, the bottom cymbal is inclined, together with the receiving plate, at a predetermined inclination angle with respect to a horizontal plane by the urging force of the compression coil spring.
摘要:
The present invention provides a pesticidal composition comprising a compound represented by the formula (I): wherein A, B, R, R1, R2, R3, R4, R5, R6 and R7 are as defined in the description, and 2,6-dichloro-4-(3,3-dichloroallyloxy)phenyl 3-[5-(trifluoromethyl)-2-pyridyloxy]propyl ether as active ingredients, and also provides a pest control method which comprises the step of applying an effective amount of the compound represented by the above formula (I) and an effective amount of 2,6-dichloro-4-(3,3-dichloroallyloxy)phenyl 3-[5-(trifluoromethyl)-2-pyridyloxy]propyl ether to pests or a place where pests inhabit.
摘要:
With respect to a lead detection method that uses rhodizonic acid, it is made possible to clearly identify pink or red coloration caused by a reaction between lead and rhodizonic acid even in cases where Sn is present in a specimen. To this end, an acidic aqueous solution or a buffer solution thereof (e.g., tartaric acid) in which hydrogen peroxide coexists is used as a reagent. Hydrogen peroxide oxidizes Sn2+ into Sn4+. Since Sn4+ does not react with rhodizonic acid, the presence of Sn does not interfere with the visual identification of any pink or red coloration caused by the reaction between lead and rhodizonic acid.