Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of producing powder metal parts

a technology of metallurgical powder and metal parts, which is applied in the field of producing a material from a metallurgical powder, can solve the problems of consuming a significant amount of time and energy, and achieve the effects of high surface durability, high rolling contact fatigue, and high precision

Inactive Publication Date: 2005-06-09
BORGWARNER INC
View PDF33 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] If high surface durability, high rolling contact fatigue, and high precision are not needed, and a medium or high performance application is not needed, the parts are sinter hardened and then tempered. If a medium or high performance application is needed and the furnace does not have a fast cooling capacity the compact is high temperature sintered, then sinter hardened, and tempered. If a medium or high performance application is needed and the furnace has fast cooling capacity, the compact is high temperature sinter hardened in one step and then tempered.

Problems solved by technology

While this technique is acceptable, it takes a significant amount of time and energy since the part needs to cool down to room temperature and then heat up again to get to the annealing temperature.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of producing powder metal parts
  • Method of producing powder metal parts
  • Method of producing powder metal parts

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] A powder including 0.60 wt % carbon, 0.7 wt % silicon, 0.13 wt % manganese, 4.4 wt % nickel, 0.85 wt % molybdenum, and the balance being iron was combined by blending, see Table 2. A green compact was formed by molding the powder between 25 to 65 tsi. The green density of the compact was 6.95 g / cc. The green compact was then sintered at 2300° F. for 40 minutes. In the next step the compact is sinter furnace hardened at 1850° F. with fast cooling for 25 minutes. Lastly, the compact was tempered at 400° F. for 60 minutes. The end product, a 25-teeth sprocket displayed an apparent hardness of 37 to 39 HRC and an overall tooth density of 7.07 g / cm3. The tooth rupture of the sprocket were tested to see how much load may be applied before the teeth fail or rupture. In this example the test was conducted using three 0.200″ diameter pins. The result was 7300 lbf to 8300 lbf in comparison to the same part by MPIF FN-0208 powder being made by the double pressed double sintered method a...

example 2

[0037] A powder including 0.55 wt % carbon, 0.7 wt % silicon, 0.13 wt % manganese, 4.4 wt % nickel, 0.85 wt % molybdenum, and the balance being iron was combined by blending as shown in Table 4. A green compact was formed by molding the powder between 25 and 65 tsi. The green density of the green compact was 6.95 g / cc. The green compact was then sintered at 2300° F. for 40 minutes. In the next step the compact is sinter furnace hardened at 1850° F. with fast cooling for 25 minutes. Lastly, the compact was tempered at 400° F. for 60 minutes. The end product, a 17-teeth sprocket displayed an apparent hardness of 38.5 HRC and an overall tooth density of 7.05 g / cm3. The tooth rupture of the sprocket were tested to see how much load may be applied before the teeth fail or rupture. In this example the test was conducted using three 0.187″ diameter pins. The result was 3350 lbf to 4350 lbf in comparison to the same part by MPIF FN-0208 powder being made by the double pressed double sintere...

example 3

[0039] A powder including 0.60 wt % carbon, 0.7 wt % silicon, 0.13 wt % manganese, 4.4 wt % nickel, 0.85 wt % molybdenum, and the balance being iron, was combined by blending as shown in Table 6. A green compact was formed by molding the powder between 25 and 65 tsi. The green density of the green compact was 6.95 g / cc. The green compact was then sintered at 2300° F. for 60 minutes. In the next step the compact is sinter furnace hardened at 1850° F. with fast cooling for 25 minutes. Lastly, the compact was tempered at 400° F. for 60 minutes. The end product, a 26-teeth sprocket displayed an apparent hardness of 40 HRC and an overall tooth density of 7.06 g / cm3. The tooth rupture of the sprocket were tested to see how much load may be applied before the teeth fail or rupture. In this example the test was conducted using three 0.187″ diameter pins. The result was 4740 lbf in comparison to the same part by MPIF FN-0208 powder being made by the double pressed double sintered method and ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

A method of producing parts from powdered metal comprising the steps of providing a metallurgic powder, compressing the powder at a pressure of 25 to 65 tsi to provide a green compact with a density if 6.4 g / cc to 7.4 g / cc. The compact is then high temperature sintered at a temperature of 2100° F. to 2400° F. for 20 to 60 minutes or regularly sintered at a temperature of 1650° F. to 2400° F. for 20 to 80 minutes, held between 1000° F. to 1800° F. for 5 to 60 minutes, and then cooled to room temperature. Then, the compact is selectively densified to greater than 7.6 g / cc. The compact is sinter hardened to obtain a mainly Martensite microstructure. The compact can be directly high temperature sinter hardened if selective densification is not necessary. Material made by this method is also disclosed.

Description

REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation-in-part of parent application Ser. No. 10 / 697,344 filed Oct. 30, 2003 entitled, “METHOD OF PRODUCING POWDER METAL PARTS” which claims the benefit of provisional application No. 60 / 432,823, filed Dec. 12, 2002, entitled “METHOD OF PRODUCING POWDER METAL PARTS”. The aforementioned applications are hereby incorporated by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The invention pertains to a method to produce a material from a metallurgical powder. More particularly, the invention pertains to a method of producing a material from a metallurgical powder comprising iron and carbon. [0004] 2. Description of Related Art [0005] Sinter hardening is a process used to produce a high martensite content material without using a conventional heat treatment process, such as batch heat treating or induction hardening. The sinter-hardening process comprises the steps of sintering the compact...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): B22F1/00B22F5/08B22F3/10B22F3/16B22F3/24C22C1/04C22C33/02C22C38/00
CPCB22F3/1017B22F2003/248B22F2998/00B22F2998/10C22C33/02C22C33/0264B22F3/16B22F5/08B22F3/24B22F3/02B22F3/10C22C1/04
Inventor SUN, RYANXU, KAI
Owner BORGWARNER INC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com