WO1991010754A2 - Verfahren zur herstellung hochfester sinterteile aus stahlpulver - Google Patents
Verfahren zur herstellung hochfester sinterteile aus stahlpulver Download PDFInfo
- Publication number
- WO1991010754A2 WO1991010754A2 PCT/DE1991/000041 DE9100041W WO9110754A2 WO 1991010754 A2 WO1991010754 A2 WO 1991010754A2 DE 9100041 W DE9100041 W DE 9100041W WO 9110754 A2 WO9110754 A2 WO 9110754A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compacts
- sintered parts
- tempering treatment
- producing high
- compressed
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 15
- 239000010959 steel Substances 0.000 title claims abstract description 15
- 238000005245 sintering Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 19
- 238000005496 tempering Methods 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000000137 annealing Methods 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000009692 water atomization Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
Definitions
- the invention relates to a method for producing high-strength
- a minimum tensile strength of 750 N / mm 2 is considered to be high strength
- This known steel alloy powder is produced by water atomization, subsequent reduction annealing and grinding of the resulting agglomerate. As further described in EP 0 136 169 B1, this powder after mixing with 0.5% by weight
- the parts thus hardened were finally tempered at 170 ° C for 90 minutes. Afterwards, the parts should have a tensile strength of 1000 or 1170 N / mm 2 .
- Energy use also includes the use of an oil bath as a quenching medium. The latter is not just from a precautionary point of view
- Sintered parts adhering oil production problems since in many cases it must be removed thoroughly in order to obtain usable parts. Examples of this include oil pump and gear parts that are delivered to the end user ready for installation. Compared to the oils used in engine and gear construction, the hardening oil has only little lubricating properties and must therefore be removed. This removal also often requires
- the object of the invention is therefore to provide a method with which high-strength sintered parts can be produced, but for the hardening of which no quenching in an oil bath is required.
- Self-hardening agent i.e. a material that can be cooled comparatively mildly (in air or under a gas shower arranged in the cooling zone of the sintering furnace) and which nevertheless guarantees complete martensitic hardening. Due to these mild cooling conditions, hardening stresses do not occur, as in the known oil-hardening material, which result in a subsequent
- Tempering treatment is therefore not only superfluous per se in the material to be used according to the invention, but one should even have expected that tempering would result in a decrease in the strength properties. But that would have meant that the aim according to the invention would not have been achieved. It was therefore completely surprising that in the case of the invention
- Maraging steels during the tempering treatment because when the martensite is stored at 480-500 ° C, intermetallic phases separate from added alloy elements without the martensite converting.
- the alloying elements responsible for this are not contained in the steel powder to be used according to the invention.
- a tempering temperature of about 300 ° C and a tempering time of about 50 to 70 minutes have proven particularly useful.
- the sintering heat for example, have been cooled and hardened under a gas shower arranged in the cooling zone of the sintering furnace, because of their high strength and hardness, they can no longer be subjected to a metal-forming calibration process.
- the method according to the invention allows dimensional accuracies that are below + 0.05%.
- a steel powder with the following composition (% by weight) was produced by water atomization of a steel melt:
- Milling to dissolve the powder agglomerate formed on annealing was 0.15% oxygen content of the powder.
- About 1.0% of finely divided copper and 0.6% of graphite and about 1% of zinc stearate were then added to this steel powder as a lubricant.
- Metal powder presses were produced from this powder by cold pressing with a density of approx. 7 g / cm 3 . These compacts were then sintered at 1120 ° C and from the sintering heat under one
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4001899.7 | 1990-01-19 | ||
| DE19904001899 DE4001899C1 (enrdf_load_stackoverflow) | 1990-01-19 | 1990-01-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1991010754A2 true WO1991010754A2 (de) | 1991-07-25 |
| WO1991010754A3 WO1991010754A3 (de) | 1991-09-05 |
Family
ID=6398605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1991/000041 WO1991010754A2 (de) | 1990-01-19 | 1991-01-17 | Verfahren zur herstellung hochfester sinterteile aus stahlpulver |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE4001899C1 (enrdf_load_stackoverflow) |
| WO (1) | WO1991010754A2 (enrdf_load_stackoverflow) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19521941C1 (de) * | 1995-06-07 | 1996-10-02 | Mannesmann Ag | Verfahren und Vorrichtung zur Herstellung von Sinterteilen |
| DE19738919C1 (de) | 1997-09-05 | 1999-04-29 | Maxon Motor Gmbh | Verfahren zur Herstellung eines Gleitlagers und Gleitlager |
| RU2188744C2 (ru) * | 2000-01-19 | 2002-09-10 | Открытое акционерное общество "АВТОВАЗ" | Способ изготовления седел клапанов для двс из порошкового материала |
| TWI246947B (en) * | 2004-06-10 | 2006-01-11 | Taiwan Powder Technologies Co | Method for making sintered body of metal powder and sintered body prepared therefrom |
| DE102013001246A1 (de) * | 2013-01-25 | 2014-07-31 | Gkn Sinter Metals Holding Gmbh | Verfahren zur Herstellung eines Flügels für eine Flügelzellenpumpe, Flügel für eine Flügelzellenpumpe sowie Flügelzellenpumpe |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1162702A (en) * | 1965-09-14 | 1969-08-27 | Hoganas Billesholms Ab | Low Alloy Iron Powder and process of preparing the same |
| JPS55128504A (en) * | 1979-03-28 | 1980-10-04 | Sumitomo Electric Ind Ltd | Manufacture of high strength sintered parts |
| JPS6075501A (ja) * | 1983-09-29 | 1985-04-27 | Kawasaki Steel Corp | 高強度焼結部品用の合金鋼粉 |
| JPS6184302A (ja) * | 1984-09-28 | 1986-04-28 | Toyota Motor Corp | 焼結鍛造部品の製造方法 |
-
1990
- 1990-01-19 DE DE19904001899 patent/DE4001899C1/de not_active Expired - Lifetime
-
1991
- 1991-01-17 WO PCT/DE1991/000041 patent/WO1991010754A2/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO1991010754A3 (de) | 1991-09-05 |
| DE4001899C1 (enrdf_load_stackoverflow) | 1991-07-25 |
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