Sintered bearing bush material, sliding bearing, internal combustion engine and electric motor

Patent metadata

Field	Value
Publication number	US-11796000-B2
Application number	US-202117191672-A
Country	US
Kind code	B2
Filing date	Mar 3, 2021
Priority date	Mar 4, 2020
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A sintered bearing bush material for a sliding bearing may include: 0.5 to 1.7 percentage by weight carbon; 0.2 to 1.2 percentage by weight manganese; 0.2 to 1.2 percentage by weight sulphur; 1.2 to 2.4 percentage by weight nickel; 1.0 to 2.1 percentage by weight molybdenum; 3.0 to 7.0 percentage by weight copper; 0.2 to 1.2 percentage by weight tin; 0 to 0.8 percentage by weight phosphorus; and a residual component.

First claim

The invention claimed is:

1. A sintered bearing bush material for a sliding bearing, comprising:
0.5 to 1.7 percentage by weight carbon;
0.2 to 1.2 percentage by weight manganese;
0.2 to 1.2 percentage by weight sulphur;
1.2 to 2.4 percentage by weight nickel;
1.0 to 2.1 percentage by weight molybdenum;
3.0 to 7.0 percentage by weight copper;
0.2 to 1.2 percentage by weight tin;
0 to 0.8 percentage by weight phosphorus; and
a residual component; and
wherein the residual component comprises a maximum of 0.2 percentage by weight impurities.

2. The sintered bearing bush material according to claim 1 , wherein the residual component contains 83.4 percentage by weight to 94.9 percentage by weight iron.

3. The sintered bearing bush material according to claim 1 , wherein the residual component consists of iron and impurities.

4. The sintered bearing bush material according to claim 1 , wherein:
the bearing bush material is produced from a powder mixture with at least three powder components and a pressing adjuvant; and
one of the at least three powder components is a sulphidic solid lubricant.

5. The sintered bearing bush material according to claim 1 , wherein the bearing bush material is sintered at a temperature of 1050° Celsius to 1150° Celsius and in a sinter atmosphere which comprises a mixture of hydrogen and nitrogen or which comprises an endogas.

6. The sintered bearing bush material according to claim 1 , wherein the sintered bearing bush material has a structure including martensitic and bainitic structure components, which collectively account for an at least 70 volume percent proportion of the structure.

7. The sintered bearing bush material according to claim 1 , wherein:
the bearing bush material has a residual porosity of at least 8 percent;
the bearing bush material has a density of 6.2 to 6.9 g/cm 3 ; and
a volume of the residual porosity is filled to at least 30 percent with an oil.

8. The sintered bearing bush material according to claim 1 , comprising:
0.5 to 1.3 percentage by weight, carbon;
0.2 to 0.9 percentage by weight, manganese;
0.2 to 1.0 percentage by weight, sulphur;
1.2 to 2.1 percentage by weight, nickel;
1.0 to 1.9 percentage by weight, molybdenum;
3.0 to 6.0 percentage by weight, copper;
0.2 to 0.8 percentage by weight, tin; and
0 to 0.4 percentage by weight phosphorus.

9. A sliding bearing comprising:
a shaft, which has a shaft material; and
a bearing bush, which has a sintered bearing bush material according to claim 1 ;
wherein the shaft is guided in the bearing bush in a sliding manner and movably relative to the bearing bush.

10. The sliding bearing according to claim 9 , wherein the shaft material includes:
0.4 to 0.5 percentage by weight carbon;
2.7 to 3.3 percentage by weight silicon;
0 to 0.6 percentage by weight manganese;
8 to 10 percentage by weight chromium;
0 to 0.5 percentage by weight nickel;
0 to 0.04 percentage by weight phosphorus;
0 to 0.03 percentage by weight sulphur; and
residual component iron and production-related impurities.

11. The sliding bearing according to claim 9 , wherein the shaft material includes:
0.45 to 0.55 percentage by weight carbon;
0 to 0.45 percentage by weight silicon;
8 to 10 percentage by weight manganese;
20 to 22 percentage by weight chromium;
3.5 to 5.5 percentage by weight nickel;
0 to 0.04 percentage by weight phosphorus;
0 to 0.03 percentage by weight sulphur;
0.4 to 0.6 percentage by weight nitrogen;
1.8 to 2.5 percentage by weight niobium;
0.8 to 1.5 percentage by weight tungsten; and
residual component iron and production-related impurities.

12. The sliding bearing according to claim 9 , wherein the shaft material includes:
0 to 0.08 percentage by weight carbon;
0 to 0.5 percentage by weight silicon;
0 to 0.5 percentage by weight manganese;
13.5 to 15.5 percentage by weight chromium;
30 to 33.5 percentage by weight nickel;
0 to 0.015 percentage by weight phosphorus;
0 to 0.01 percentage by weight sulphur;
1.6 to 2.2 percentage by weight aluminium;
0.4 to 0.9 percentage by weight niobium;
2.3 to 2.9 percentage by weight titanium;
0.4 to 1.0 percentage by weight molybdenum; and
residual component iron and production-related impurities.

13. The sliding bearing according to claim 9 , wherein the shaft material includes:
0 to 0.13 percentage by weight carbon;
0 to 1 percentage by weight silicon;
0 to 1 percentage by weight manganese;
18 to 21 percentage by weight chromium;
15 to 21 percentage by weight cobalt;
0 to 0.015 percentage by weight phosphorus;
0 to 0.02 percentage by weight sulphur;
1 to 2 percentage by weight aluminium;
0 to 0.2 percentage by weight copper;
2 to 3 percentage by weight titanium;
0 to 0.15 percentage by weight zirconium;
0 to 0.02 percentage by weight boron;
0 to 1.5 percentage by weight iron; and
residual component nickel and production-related impurities.

14. The sliding bearing according to claim 9 , wherein the shaft material includes:
0.25 to 0.35 percentage by weight carbon;
0 to 0.3 percentage by weight silicon;
4 to 6 percentage by weight manganese;
24 to 26 percentage by weight chromium;
10 to 13 percentage by weight nickel;
0 to 0.2 percentage by weight phosphorus;
0 to 0.2 percentage by weight sulphur;
0 to 0.5 percentage by weight aluminium;
0 to 0.5 percentage by weight copper;
1.8 to 2.5 percentage by weight niobium;
0.5 to 0.7 percentage by weight nitrogen; and
residual component iron and production-related impurities.

15. An internal combustion engine comprising:
a sliding bearing according to claim 9 ; and
at least one gas exchange valve, which has a valve stem forming the shaft of the sliding bearing.

16. An electric motor comprising:
a sliding bearing according to claim 9 ; and
a stator and a rotor, wherein the rotor is mounted on the stator rotatably relative to the stator via the sliding bearing.

17. A sintered bearing bush material for a sliding bearing, comprising:
0.5 to 1.7 percentage by weight carbon;
0.2 to 1.2 percentage by weight manganese;
0.2 to 1.2 percentage by weight sulphur;
1.2 to 2.4 percentage by weight nickel;
1.0 to 2.1 percentage by weight molybdenum;
3.0 to 7.0 percentage by weight copper;
0.2 to 1.2 percentage by weight tin;
0 to 0.8 percentage by weight phosphorus; and
a residual component;
wherein the bearing bush material has a density of 6.2 to 6.9 g/cm 3 ; and
wherein the sintered bearing bush material has a structure including martensitic and bainitic structure components, which collectively account for an at least 70 volume percent proportion of the structure.

18. The sintered bearing bush material according to claim 17 , wherein a volume of a residual porosity of the bearing bush material is filled to at least 80 percent with an oil.

19. The sintered bearing bush material according to claim 17 , wherein:
the bearing bush material is produced from a powder mixture with at least three powder components and a pressing adjuvant; and
one of the at least three powder components is a sulphidic solid lubricant.

20. A sintered bearing bush material for a sliding bearing, comprising:
0.5 to 1.7 percentage by weight carbon;
0.2 to 1.2 percentage by weight manganese;
0.2 to 1.2 percentage by weight sulphur;
1.2 to 2.4 percentage by weight nickel;
1.0 to 2.1 percentage by weight molybdenum;
3.0 to 7.0 percentage by weight copper;
0.2 to 1.2 percentage by weight tin;
0 to 0.8 per

Assignees

• Mahle Int Gmbh

Inventors

• Gutmann Andreas
• Kurmanaeva Lilia
• Sutter Patrick
• Wintrich Klaus

Classifications

• F16C33/121 Primary

  Use of special materials · CPC title

• C22C1/0433

  Nickel- or cobalt-based alloys · CPC title

• C22C19/058

  without Mo and W · CPC title

• C22C33/0242

  using the impregnating technique · CPC title

• C22C38/001

  containing N · CPC title