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US 5,516,483 AGranted
Hi-density sintered alloy
AssigneeStackpole Limited
InventorsRohith Shivanath, Peter Jones, Danny T. D. Thieu
Life of this patent
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Abstract
A process of forming a sintered article for powder metal comprising blending carbon and ferro alloys and lubricant with compressible elemental iron powder, pressing said blended mixture to form sintering said article, and then high temperature sintering said article in a reducing atmosphere to produce a sintered article having a high density from a single compression.
Claims17
A process of forming a sintered article of powder metal comprising:
- (a) blending
- i. carbon
- ii. separate ferro alloy particles of ferro manganese, ferro molybdenum, ferro phosphorous and ferro boron or boron carbide,
- iii. lubricant with
- iv. compressible iron powder,
- (b) pressing said blended mixture to shape in a single compaction stage
- (c) and then high temperature sintering said article at a temperature of at least 1300.degree. C. in a reducing atmosphere to produce a sintered article having a sintered density of greater than 7.3 g/cc.
4 more elements
A process of forming a sintered article of powder metal comprising:
- a. blending
- i. carbon
- ii. separate ferro alloy particles of ferro silicon, ferro manganese, ferro molybdenum, ferro aluminum, ferro chromium and ferro phosphorous
- iii. lubricant with
- iv. compressible iron powder,
- b. pressing said blended mixture to shape in a single compaction stage
- c. and then high temperature sintering said article, at a temperature of at least 1280.degree. C. in a reducing atmosphere
- to produce a sintered article having a sintered density of greater than 7.3 g/cc.
5 more elements
A process of manufacturing a sintered powder metal connecting rod comprising:
- a. blending
- i. carbon
- ii. separate ferro alloy particles of ferro manganese, ferro molybdenum, ferro phosphorous and ferro boron or boron carbide,
- iii. lubricant with
- iv. compressible iron powder,
- b. pressing said blended mixture to shape in a single compaction stage
- c. and then high temperature sintering said connecting rod at a temperature of at least 1300.degree. C. in a reducing atmosphere
- to produce a sintered powder metal connecting rod having a sintered density of greater than 7.3 g/cc.
5 more elements
Dependencies are inferred from the claim text.