CN100548540C - Lubricant agent special for powder metallurgical stainless steel - Google Patents
Lubricant agent special for powder metallurgical stainless steel Download PDFInfo
- Publication number
- CN100548540C CN100548540C CNB2008100237134A CN200810023713A CN100548540C CN 100548540 C CN100548540 C CN 100548540C CN B2008100237134 A CNB2008100237134 A CN B2008100237134A CN 200810023713 A CN200810023713 A CN 200810023713A CN 100548540 C CN100548540 C CN 100548540C
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- lubricant
- powder metallurgical
- metallurgical stainless
- powder
- 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
- Lubricants (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of lubricant agent special for powder metallurgical stainless steel, described lubricant mainly is made up of following raw materials by weight percent:＜45 μ m Acrawaxs 48～53%,＜45 μ m stearic acid 27～32%, plastic of poly vinyl acetate 18～32%.Described lubricant addition is 0.3% when producing the powder metallurgical stainless steel product of ratio of height to diameter＜1: 1; Described lubricant addition is 0.5% when producing the powder metallurgical stainless steel product of ratio of height to diameter＞1: 1.Adopt lubricant of the present invention, can improve compact strength and surface smoothness, significantly prolong die life, make the productivity ratio of powder metallurgical stainless steel goods, yield rate and quality get a promotion.
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 stainless steel.Make an addition in the powder metallurgical stainless steel powder lubricate.Belong to powdered metallurgical material additive technology field.
Background technology
Along with economy constantly develops, the stainless steel products purposes is more and more wider.Powder metallurgical stainless steel has great advantage when producing raw material expensive stainless steel part as a kind of near-net-shape technology.And the stainless steel majority is austenitic stainless steel or ferritic stainless steel, and poor processability causes processing charges high, and amount of machining be avoided or be reduced to the powder metallurgical stainless steel goods can, more has superiority on cost.But same because stainless steel belongs to high-alloy steel, owing to solution strengthening, pellet hardness still has Hv180-210 to powder of stainless steel after having eliminated work hardening.Such hardness has caused powder metallurgy working condition bed die condition of work abominable, and mould useful life is low; It is low that the compacted products ratio of height to diameter surpasses 1: 1 o'clock pressed compact compact density, and compact strength is low; The pressed compact surface smoothness is low.Above reason has caused powder metallurgical stainless steel production can't be applicable to demand fully.For overcoming the above problems, can't remove under the adverse effect situation that solution strengthening brings, generally adopt in the industry and in powder metallurgical stainless steel, add zinc stearate and improve compact strength and surface smoothness, to prolong die life.But such lubricant additive addition is generally higher, and consumption accounts for the 1.0%-1.6% of powder metallurgical stainless steel material.Because the lubricant quantity height makes the inner residual lubricant quantity of pressed compact many, thereby has reduced the product solid density, improved pressing pressure, reduced the corrosion resistance of powder metallurgical stainless steel.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, a kind of lubricant agent special for powder metallurgical stainless steel that can reduce consumption in the powder metallurgical stainless steel material is provided.
Purpose of the present invention realizes like this: a kind of lubricant agent special for powder metallurgical stainless steel is characterized in that described lubricant mainly is made up of following raw materials by weight percent:
＜45 μ m Acrawaxs 48～53%
＜45 μ m stearic acid 27～32%
Plastic of poly vinyl acetate 18～32%
The percentage by weight sum that the raw material of described lubricant is formed is 100%.
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 32% o'clock knockout press; The stearic acid greasy property is good, but mix with plastic of poly vinyl acetate the back addition greater than 32% 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.So this lubricant adopts above-mentioned prescription.
This lubricant addition is 0.3% when producing the powder metallurgical stainless steel product of ratio of height to diameter＜1: 1, and ratio of height to diameter＞its addition was 0.5% in 1: 1 o'clock.
This lubricant quantity is much smaller than common powder metallurgical stainless steel lubricant quantity.Be 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 stainless steel part pressing process and meet this phase change conditions, so the stainless steel 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 1-2 μ of thickness m, the existence of this skim has been stopped stainless steel powder and has directly been contacted with die wall, significantly reduced stainless steel 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, make the inner residual lubricant quantity of pressed compact much smaller than the product that adopts common lubricant, thereby improved the product solid density, reduced pressing pressure, and make the interior residual C of powder metallurgical stainless steel be reduced to the Ppm level, improved the corrosion resistance of powder metallurgical stainless steel.Adopt the metallurgical stainless steel lubricant of special powder of the present invention, can enhance productivity 50%, improve the quality of products, the stainless steel parts that can not produce with powder metallurgical technique before producing.10000 yuan of per ten thousand product escapable costs.
To sum up, adopt lubricant of the present invention, can improve compact strength and surface smoothness, significantly prolong die life, make the productivity ratio of powder metallurgical stainless steel goods, yield rate and quality get a promotion.
Description of drawings
Knockout press comparison diagram when Fig. 1 is lubricant agent special of the present invention and common lubricant 6.4g/cc.
Fig. 2 is lubricant agent special of the present invention and common lubricant 650Mpa pressed density comparison diagram.
Fig. 3 is lubricant agent special of the present invention and common lubricant SS-304 vacuum-sintering base salt mist experiment time comparison diagram.
The specific embodiment
Embodiment 1: product ratio of height to diameter＜1: 1
Get-45 μ m Acrawax 50kg ,-45 μ m stearic acid 30kg, plastic of poly vinyl acetate 20kg is mixed with lubricant through mixing.
The lubricant of getting the step 1 preparation is by 0.3kg, join in the 99.7kg powder metallurgical stainless steel powder, speed with 19r/min in clean double cone mixer is mixed 60min, promptly makes the powder metallurgical stainless steel goods by the metallurgical stainless steel parts production technology of ordinary powder.
Embodiment 2: product ratio of height to diameter＞1: 1
Get-45 μ m Acrawax 50kg ,-45 μ m stearic acid 30kg, plastic of poly vinyl acetate 20kg is mixed with lubricant through mixing.
The lubricant of getting the step 1 preparation is by 0.5kg, join in the 99.5kg powder metallurgical stainless steel powder, speed with 21r/min in clean double cone mixer is mixed 60min, promptly makes the powder metallurgical stainless steel goods by the metallurgical stainless steel parts production technology of ordinary powder.
Among above-mentioned each figure, knockout press comparison diagram when Fig. 1 is lubricant agent special of the present invention and common lubricant 6.4g/cc; Fig. 2 is lubricant agent special of the present invention and common lubricant 650Mpa pressed density comparison diagram; Fig. 3 is lubricant agent special of the present invention and common lubricant SS-304 vacuum-sintering base salt mist experiment time comparison diagram.
Claims (3)
1, a kind of lubricant agent special for powder metallurgical stainless steel is characterized in that described lubricant mainly is made up of following raw materials by weight percent:
＜45 μ m Acrawaxs 48～53%
＜45 μ m stearic acid 27～32%
Plastic of poly vinyl acetate 18～32%
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 stainless steel according to claim 1 is characterized in that described lubricant addition is 0.3% when producing the powder metallurgical stainless steel product of ratio of height to diameter＜1: 1.
3, a kind of lubricant agent special for powder metallurgical stainless steel according to claim 1 is characterized in that described lubricant addition is 0.5% when producing the powder metallurgical stainless steel product of ratio of height to diameter＞1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100237134A CN100548540C (en) | 2008-04-18 | 2008-04-18 | Lubricant agent special for powder metallurgical stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100237134A CN100548540C (en) | 2008-04-18 | 2008-04-18 | Lubricant agent special for powder metallurgical stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101259530A CN101259530A (en) | 2008-09-10 |
| CN100548540C true CN100548540C (en) | 2009-10-14 |
Family
ID=39960341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008100237134A Expired - Fee Related CN100548540C (en) | 2008-04-18 | 2008-04-18 | Lubricant agent special for powder metallurgical stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100548540C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102764886A (en) * | 2012-07-16 | 2012-11-07 | 包敢锋 | Strengthen reinforcing agent for pressed blank of powder metallurgy structural part |
| WO2015102026A1 (en) | 2014-01-06 | 2015-07-09 | Council Of Scientific & Industrial Research | A process for the preparation of titanium foam |
| CN104388154A (en) * | 2014-10-24 | 2015-03-04 | 苏州莱特复合材料有限公司 | Powder metallurgy lubricant and preparation method thereof for stainless steel |
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 |
| US6190605B1 (en) * | 1997-04-09 | 2001-02-20 | Zenith Sintered Products, Inc. | Dry die wall lubrication |
| CN1319467A (en) * | 2001-02-20 | 2001-10-31 | 华南理工大学 | Warm-pressing formation method for powder metallurgical bevel gear |
-
2008
- 2008-04-18 CN CNB2008100237134A patent/CN100548540C/en not_active Expired - Fee Related
Patent Citations (4)
| 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 |
| US6190605B1 (en) * | 1997-04-09 | 2001-02-20 | Zenith Sintered Products, Inc. | Dry die wall lubrication |
| CN1319467A (en) * | 2001-02-20 | 2001-10-31 | 华南理工大学 | Warm-pressing formation method for powder metallurgical bevel gear |
Non-Patent Citations (6)
| Title |
|---|
| 模壁润滑与温压技术－－高密度与高强度粉末冶金零件制造新工艺. 韩凤麟.新材料产业，第1期. 2007 |
| 模壁润滑与温压技术－－高密度与高强度粉末冶金零件制造新工艺. 韩凤麟.新材料产业，第1期. 2007 * |
| 润滑剂对铁及不锈钢粉末成形制程之影响Ⅱ，成形特性. 林育全等.Journal of materials science and engineering.,Vol.33 No.4. 2001 |
| 润滑剂对铁及不锈钢粉末成形制程之影响Ⅱ，成形特性. 林育全等.Journal of materials science and engineering.,Vol.33 No.4. 2001 * |
| 粉末冶金静电模壁润滑中润滑剂粉末的荷电影响因素. 杨霞等.粉末冶金技术，第22卷第5期. 2004 |
| 粉末冶金静电模壁润滑中润滑剂粉末的荷电影响因素. 杨霞等.粉末冶金技术，第22卷第5期. 2004 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101259530A (en) | 2008-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104449973B (en) | A kind of high temperature die forging lubricant of the nano-particle containing lamellar | |
| CN101850423B (en) | High strength self-lubricating iron-copper powder composite material and preparation method thereof | |
| CN103757464A (en) | Copper-based self-lubricating composite material and preparation method thereof | |
| CN101579738A (en) | Double pressing molding method for preparing high-density powder metallurgical iron-base part | |
| CN104805366B (en) | Powder-metallurgy low-alloy steel and preparation method thereof | |
| CN100548540C (en) | Lubricant agent special for powder metallurgical stainless steel | |
| CN102773483B (en) | Method for manufacturing valve seat of stop valve by powder metallurgy | |
| CN109666857B (en) | Plane sliding bearing with extremely low friction coefficient and preparation method thereof | |
| CN101967595A (en) | Spray-deposition nano particle reinforced zinc-based composite and preparation method thereof | |
| CN104762440A (en) | Calcium deoxidizer using nano graphite powder as carrier and preparation method thereof | |
| CN1332055C (en) | Stainless steel powder composite material and its warm-pressing method | |
| CN102029386B (en) | High-hardness powder metallurgy low-alloy steel | |
| CN103028720B (en) | Manufacturing method of self-drilling anchor rod bit | |
| CN113275554B (en) | Copper-based powder metallurgy clutch friction plate for point switch and manufacturing method thereof | |
| CN1972772A (en) | Lubricants for insulated soft magnetic iron-based powder compositions | |
| CN106967484A (en) | A kind of novolac epoxy resin solid stick and preparation method thereof | |
| CN104388154A (en) | Powder metallurgy lubricant and preparation method thereof for stainless steel | |
| CN100531970C (en) | Low temperature fluxion warm compaction method | |
| CN100553827C (en) | Lubricant agent special for powder metallurgical gear | |
| CN1133520C (en) | Warm-pressing formation method for powder metallurgical bevel gear | |
| CN1206068C (en) | Stainless steel powder hot pressing shaping method | |
| CN114891550B (en) | Black phosphorus alkenyl solid lubricating coating for titanium alloy extrusion and preparation method thereof | |
| CN102634260A (en) | Drawing part solid-liquid composite lubricant coating and preparation method thereof | |
| CN109457190A (en) | A kind of WC particle enhancing Fe base powder metallurgy material and preparation method thereof | |
| CN202348900U (en) | Abrasion-resistant adjusting screw |
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: 20091014 Termination date: 20140418 |