Abstract

The present invention provides a wear-resistant copper alloy that is strong, tough, and shock-resistant and that also has high-level wear resistance. This wear-resistant copper alloy contains, by mass, 10%-40% of Zn, 2%-9% of Al, 0.4%-3.5% of Fe, 0.5%-4.0% of Ni, 0.3%-2.0% of Co, 1.0%-5.0% of Mn, and 0.3%-3.5% of Si, the remainder comprising copper and unavoidable impurities, and is characterized by having a structure wherein an α+β phase, an α+β+γ phase, and/or a β phase has dispersed therein an Al-Fe-Mn-Si-Ni-Co-based intermetallic compound.

IPC Classes  ?

• C22C 9/04 - Alloys based on copper with zinc as the next major constituent

Abstract

Provided is a lead-free brass alloy for hot processing having excellent hot-processing characteristics and mechanical properties. The alloy comprises 28.0-35.0 wt% of zinc, 0.5-2.0 wt% of silicon, 0.5-1.5 wt% of tin, 0.5-1.5 wt% of bismuth, and 0.10 wt% or less of lead, the remainder comprising copper and unavoidable impurities. The zinc equivalent is 40.0 to 43.0, and the area ratio of the κ phase after hot processing is 20% or less.

IPC Classes  ?

• C22C 9/04 - Alloys based on copper with zinc as the next major constituent
• C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
• C22F 1/08 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon

Abstract

Disclosed is an extremely useful lead-free free-machining bronze casting alloy. Said alloy, a copper-zinc-silicon bronze alloy that does not contain lead, is resistant to erosion and corrosion. The cast structure of said alloy has good mechanical properties (toughness), and said alloy can be cast into water-contacting components of water pipes, for example, via continuous casting, permanent mold casting, or sand casting. The disclosed lead-free free-machining bronze casting alloy contains, by weight, between 19.0% and 22.0% zinc, between 1.0% and 2.0% silicon, between 0.5% and 1.5% bismuth, between 1.0% and 2.0% tin, and no more than 0.20% lead, with the remainder comprising copper and unavoidable impurities.

IPC Classes  ?

• C22C 9/04 - Alloys based on copper with zinc as the next major constituent

Abstract

Disclosed is a lead-free free-machining brass alloy that is highly hot-workable and resistant to dezincification, erosion, and corrosion. Good mechanical properties can be obtained by hot-working or hot-working and heat-treating said alloy. The disclosed lead-free free-machining brass alloy, which is hot-worked, contains between 19.0% and 22.0% zinc, between 2.0% and 3.5% silicon, between 1.0% and 2.0% tin, between 0.5% and 1.5% bismuth, and at most 0.20% lead by weight, with the remainder comprising copper and unavoidable impurities.

IPC Classes  ?

• C22C 9/04 - Alloys based on copper with zinc as the next major constituent
• C22F 1/08 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
• C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working

Abstract

Provided is a solid lubricant enveloped casting material efficiently and inexpensively in order to eliminate the process for boring a hole to be embedded with a solid lubricant in the metal base of a round pipe, and embedding and securing the solid lubricant in the hole with adhesive interposed therebetween when a composite bush bearing embedded with solid lubricant is manufactured. Molten metal (13) is supplied by centrifugal casting to a cylindrical air gap (11) formed between the inner circumferential surface of a mold (5) and the outer circumferential surface of an inner tube (1) where a solid lubricant (4) is embedded while projecting to the outer circumferential surface incorporated in the inner space of the mold, and a cylindrical solidification layer of the metal where the solid lubricant is enveloped by casting and compounded is formed in the air gap, thus a solid lubricant enveloped casting material is obtained.

IPC Classes  ?

• B22D 13/06 - Centrifugal castingCasting by using centrifugal force of solid or hollow bodies in moulds rotating around an axis arranged outside of the mould
• B22D 13/02 - Centrifugal castingCasting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
• B22D 19/00 - Casting in, on, or around, objects which form part of the product
• F16C 17/02 - Sliding-contact bearings for exclusively rotary movement for radial load only
• F16C 33/10 - Construction relative to lubrication
• F16C 33/14 - Special methods of manufactureRunning-in