CN100553827C - Lubricant agent special for powder metallurgical gear - Google Patents
Lubricant agent special for powder metallurgical gear Download PDFInfo
- Publication number
- CN100553827C CN100553827C CNB200810023712XA CN200810023712A CN100553827C CN 100553827 C CN100553827 C CN 100553827C CN B200810023712X A CNB200810023712X A CN B200810023712XA CN 200810023712 A CN200810023712 A CN 200810023712A CN 100553827 C CN100553827 C CN 100553827C
- Authority
- CN
- China
- Prior art keywords
- lubricant
- powder metallurgical
- metallurgical gear
- powder
- agent special
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Powder Metallurgy (AREA)
- Lubricants (AREA)
Abstract
The present invention relates to a kind of lubricant agent special for powder metallurgical gear, it is characterized in that described lubricant mainly is made up of the raw material of following weight portion:＜45um Acrawax 42-48%,＜45um stearic acid 25-35%, plastic of poly vinyl acetate 20%, ammonium chloride 4-6%.Described lubricant addition is 0.3% when producing the powder metallurgical gear product of ratio of height to diameter＜1: 1.Described lubricant addition is 0.4% when producing the powder metallurgical gear product of ratio of height to diameter＞1: 1.The present invention improves powder metallurgical gear density by the change lubricant formulations under equal pressing pressure, change distribution of pores form and pore shape by special additive in the lubricant, to promote powder metallurgical gear intensity and strength stability.
Description
Technical field
The present invention relates to a kind of powder metallurgy lubricant, especially relate to a kind of lubricant agent special for powder metallurgical gear.Make an addition in the powder metallurgy powder of producing gear lubricate.Belong to powdered metallurgical material additive technology field.
Background technology
Along with economy constantly develops, the powder metallurgical gear purposes is more and more wider.Powder metallurgy has very big economic advantages as a kind of near-net-shape technology when the part of the high processing charges of needs such as production gear.But there is a weakness in powder metallurgical gear, and promptly intensity is about the 70%-80% of forging or machined gear, and the intensity dispersiveness is bigger.This is fatal defective as vehicle key position part on some is used, and has caused powder metallurgical gear can only be applied on the middle low-intensity stressed member, and the scope of application has been subjected to very big restriction.
Powder metallurgical gear intensity is influenced by three aspect factors mainly, and the one, material composition, the 2nd, product density, the 3rd, product distribution of pores state and shape.Because of material composition influences cost, main target is by not changing raising powder metallurgical gear density and distribution of pores form and pore shape under the technology cost condition.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of and do not changing the lubricant agent special for powder metallurgical gear that improves powder metallurgical gear density and distribution of pores form and pore shape under the technology cost condition.
The object of the present invention is achieved like this: a kind of lubricant agent special for powder metallurgical gear is characterized in that described lubricant mainly is made up of the raw material of following weight portion:
＜45um Acrawax 42-48%
＜45um stearic acid 25-35%
Plastic of poly vinyl acetate 20%
Ammonium chloride 4-6%.
This lubricant addition is 0.3% when producing the powder metallurgical gear of ratio of height to diameter＜1: 1, and this lubricant addition is 0.5% when producing the powder metallurgical gear of ratio of height to diameter＞1: 1.
This lubricant quantity is much smaller than common powder metallurgical gear lubricant quantity (0.7%-1.0%).Former because this lubricant has a characteristic: under this formulation ratio, there is the normal temperature phase transformation in hybrid lubricant under normal temperature high voltage (500Mpa-800Mpa) high shear strain (instantaneous strain＞2: 1) condition.Produce stress in the powder metallurgical gear part pressing process and meet this phase change conditions, so the iron powder that adds this lubricant is in pressing process, lubricant partly change into liquid state and between the powder of stress effect lower edge the gap flow out to die surface, die surface is coated with applies the skim lubricant film, the about 1-2um of thickness, the existence of this skim has been stopped iron powder and has directly been contacted with die wall, significantly reduced iron powder in compacting and the demoulding with the coefficient of friction of die surface, reduced the mould loss, reduce knockout press, improved product surface fineness.Because lubricant quantity is low and the part lubricant flows out after phase transformation, makes the inner residual lubricant quantity of pressed compact much smaller than the product that adopts common lubricant, thereby under equal pressing pressure, improved product density.
Plastic of poly vinyl acetate has and have the characteristic that is become liquid phase by solid transformation when normal temperature high voltage high shear strain, with mix the back with it at big lubricant such as the stearic acid of the liquid angle of wetting of plastic of poly vinyl acetate, Acrawax, after paraffin etc. mix, in the compacting production process, plastic of poly vinyl acetate under high pressure carries lubricants such as stearic acid by flowing to die wall in the pressed compact after being transformed into liquid state, forms lubricant film on die wall; But itself greasy property deficiency of plastic of poly vinyl acetate, addition rises rapidly greater than 30% o'clock knockout press; The stearic acid greasy property is good, but mix with plastic of poly vinyl acetate the back addition greater than 35% after, the lubricant mobile performance significantly reduces, die surface can not form lubricant film when surpassing 40% back compacting, causes knockout press to increase; Acrawax greasy property and stearic acid are suitable, and be strong with the liquid adhesion of plastic of poly vinyl acetate, but be higher than in addition the product compact strength reduced at 60% o'clock.Paraffin greasy property and mouldability are too poor, cast out.Remain in the pressed compact as disperse distribution shape particle because of ammonium chloride in the pressing process, ammonium chloride generates HCl steam at pressed compact inner the decomposition during sintering, will be after HCL steam generates directly in exposed ferrous powder granules surface and the reaction of iron powder oxide on surface, remove the sull that hinders sintering, the sintering neck is grown up fast when making sintering, make the hole sphering, significantly reduce powder metallurgical gear intensity dispersiveness, but ammonium chloride itself does not have lubricity, and at the inner gas that generates of pressed compact, addition should not surpass 8% when decomposing.Adopt this lubricant agent special for powder metallurgical gear 1 order of magnitude of the dispersed reduction of powder metallurgical gear intensity can be promoted intensity 10%～20%.Data are seen description of drawings.
To sum up, the present invention improves powder metallurgical gear density by the change lubricant formulations under equal pressing pressure, change distribution of pores form and pore shape by special additive in the lubricant, to promote powder metallurgical gear intensity and strength stability.
Description of drawings
Fig. 1 is lubricant agent special for powder metallurgical gear of the present invention and common lubricant intensity contrast figure.
Fig. 2 is lubricant agent special for powder metallurgical gear of the present invention and common lubricant density comparison diagram.
Fig. 3 is lubricant agent special metallographic structure of the present invention (hole is sphering all).
The specific embodiment
Embodiment 1: product ratio of height to diameter＜1: 1
Get＜45um Acrawax 45kg,＜45um stearic acid 30kg, plastic of poly vinyl acetate 20kg and ammonium chloride 5kg prepare lubricant.
Get the lubricant 0.3kg of step 1 preparation, join in the 99.7kg powder metallurgical gear powder, the speed with 19r/min in clean double cone mixer is mixed 60min, promptly makes powder metallurgical gear by the metallurgical gear part production technology of ordinary powder.
Embodiment 2: product ratio of height to diameter＜1: 1
Get＜45um Acrawax 45kg,＜45um stearic acid 30kg, plastic of poly vinyl acetate 20kg and ammonium chloride 5kg prepare lubricant.
Get the lubricant 0.4kg of step 1 preparation, join in the 99.6kg powder metallurgical gear powder, the speed with 21r/min in clean double cone mixer is mixed 60min, promptly makes powder metallurgical gear by the metallurgical gear part production technology of ordinary powder.
Among above-mentioned each figure, Fig. 1 is lubricant agent special for powder metallurgical gear of the present invention and common lubricant intensity contrast figure; Fig. 2 is lubricant agent special for powder metallurgical gear of the present invention and common lubricant density comparison diagram; Fig. 3 is lubricant agent special metallographic structure of the present invention (hole is sphering all).
Claims (3)
1, a kind of lubricant agent special for powder metallurgical gear is characterized in that described lubricant mainly is made up of the raw material of following weight portion:
＜45 μ m Acrawax 42-48%
＜45 μ m stearic acid 25-35%
Plastic of poly vinyl acetate 20%
Ammonium chloride 4-6%
The percentage by weight sum that the raw material of described lubricant is formed is 100%.
2, a kind of lubricant agent special for powder metallurgical gear according to claim 1 is characterized in that described lubricant addition is 0.3% when producing the powder metallurgical gear product of ratio of height to diameter＜1: 1.
3, a kind of lubricant agent special for powder metallurgical gear according to claim 1 is characterized in that described lubricant addition is 0.5% when producing the powder metallurgical gear product of ratio of height to diameter＞1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200810023712XA CN100553827C (en) | 2008-04-18 | 2008-04-18 | Lubricant agent special for powder metallurgical gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200810023712XA CN100553827C (en) | 2008-04-18 | 2008-04-18 | Lubricant agent special for powder metallurgical gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101259529A CN101259529A (en) | 2008-09-10 |
| CN100553827C true CN100553827C (en) | 2009-10-28 |
Family
ID=39960340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200810023712XA Expired - Fee Related CN100553827C (en) | 2008-04-18 | 2008-04-18 | Lubricant agent special for powder metallurgical gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100553827C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945275B (en) * | 2016-05-31 | 2019-04-02 | 同济大学 | A kind of high-performance powder metallurgy lubricant |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076339A (en) * | 1990-02-08 | 1991-12-31 | Smith John J | Solid lubricant for die casting process |
| CN1133520C (en) * | 2001-02-20 | 2004-01-07 | 华南理工大学 | Warm-pressing formation method for powder metallurgical bevel gear |
-
2008
- 2008-04-18 CN CNB200810023712XA patent/CN100553827C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076339A (en) * | 1990-02-08 | 1991-12-31 | Smith John J | Solid lubricant for die casting process |
| US5076339B1 (en) * | 1990-02-08 | 1998-06-09 | J & S Chemical Corp | Solid lubricant for die-casting process |
| CN1133520C (en) * | 2001-02-20 | 2004-01-07 | 华南理工大学 | Warm-pressing formation method for powder metallurgical bevel gear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101259529A (en) | 2008-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10835957B2 (en) | Composition of particulate materials and process for obtaining self-lubricating sintered products | |
| CN103008667B (en) | Method for preparing high-density iron-base powder metallurgy parts | |
| CN101850423B (en) | High strength self-lubricating iron-copper powder composite material and preparation method thereof | |
| JP2016188432A (en) | Production method of powder metallurgy workpiece and workpiece | |
| CN104759618B (en) | A kind of ferrotianium base oil-containing antifriction material | |
| CN101920335A (en) | The manufacture method of mixed powder for powder metallurgy and the manufacture method of sintered body | |
| CN104213030A (en) | Injection molding alloyed powder and application of injection molding alloyed powder in automobile transmission sliding sleeve | |
| JP5972588B2 (en) | Manufacturing method of sintered bearing | |
| CN100553827C (en) | Lubricant agent special for powder metallurgical gear | |
| CN102029386A (en) | High-hardness powder metallurgy low-alloy steel | |
| CN100548540C (en) | Lubricant agent special for powder metallurgical stainless steel | |
| CN100531970C (en) | Low temperature fluxion warm compaction method | |
| CN104099168A (en) | Powder metallurgy lubricating agent | |
| KR102364527B1 (en) | Powder mixture for powder metallurgy and manufacturing method thereof | |
| CN1206068C (en) | Stainless steel powder hot pressing shaping method | |
| KR101745689B1 (en) | Method for manufacturing stainless steel parts in a motor vehicle and the parts | |
| CN107353638A (en) | A kind of resin-matrix friction material for being granulated zirconium oxide filling and preparation method thereof | |
| JP7400218B2 (en) | Alloy powder composition | |
| SUZUKI et al. | Newly Developed Iron-based Powder Mixture, High-density SEGLESS, for High Density Compaction | |
| CN116967458A (en) | Preparation method of CuFeSn powder | |
| WO2018230568A1 (en) | Powder mixture for powder metallurgy and method of manufacturing same | |
| JPH03291303A (en) | Manufacture of iron series powder mixture for powder metallurgy | |
| CN102764886A (en) | Strengthen reinforcing agent for pressed blank of powder metallurgy structural part | |
| CN105880567A (en) | Lubricating agent for powder metallurgy gear | |
| JPH04193929A (en) | Production of sintered body of iron-based powder having superior machinability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091028 Termination date: 20140418 |