CN102756122B - Powder-metallurgy automobile transmission gear and manufacturing method thereof - Google Patents
Powder-metallurgy automobile transmission gear and manufacturing method thereof Download PDFInfo
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- CN102756122B CN102756122B CN201210207400.0A CN201210207400A CN102756122B CN 102756122 B CN102756122 B CN 102756122B CN 201210207400 A CN201210207400 A CN 201210207400A CN 102756122 B CN102756122 B CN 102756122B
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- powder
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- automobile transmission
- metallurgy automobile
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The invention discloses a powder-metallurgy automobile transmission gear and a manufacturing method thereof. The powder-metallurgy automobile transmission gear takes atomized iron powder as a base material and also comprises the following components in weight percentage of: 4%-6% of carbonyl iron powder, 0.8%-1.0% of copper powder, 4%-6% of waste steel powder, 1.2%-1.3% of manganese sulfide powder, 0.5%-0.7% of molybdenum disulfide powder, 0.7%-0.9% of chromium powder, 0.2%-0.4% of tungsten powder, 0.02%-0.03% of niobium powder, 1.1%-1.4% of graphite, 1.0%-1.5% of polyamide wax micro-powder and 1.2%-1.8% of stearic acid. According to the gear disclosed by the invention, the HRC (Rockwell hardness) of the tooth face of the gear is equal to 48-55, and the wear resistance of the gear is good. The powder-metallurgy automobile transmission gear is good in impact resisting capability, high in bearing capability, can meet production requirements and is applicable to rapid large-batch production.
Description
Technical field
The present invention relates to powder metallurgy and make auto parts and components, be specifically related to a kind of powder metallurgy automobile transmission gear and preparation method thereof.
Background technology
Existing automobile gearbox gear mainly adopts the materials such as No. 45 steel, 40Cr, 40CrNi to make; tooth face hardness HB > 350; technical process: cut → height of rough forging → normalizing → rough lumber → modified → essence, mid frequency induction hardening → lonneal → gear honing or grinding agent running-in, electrospark running-in etc.; the gear of producing wears no resistance; finished surface poor dimensional precision; technique is also more complicated, is difficult to adapt to the needs that large finger amount is produced fast.
Summary of the invention
The object of the present invention is to provide a kind of powder metallurgy automobile transmission gear and preparation method thereof, adopt powder metallurgy processing method, can adapt to quick requirements of mass production, material-saving, when joint, high conformity, dimensional accuracy is high, has shortened process route, reduced cost, because steel scrap composition is through smelting, wherein uncontrollable composition is few, and the properties of product of producing are stable.
The present invention adopts following technical scheme to achieve these goals:
A kind of powder metallurgy automobile transmission gear, it is characterized in that: take atomized iron powder as matrix, the weight percentage of all the other components is: carbonyl iron dust 4-6, copper powder 0.8-1.0, steel scrap powder 4-6, sulfuration manganese powder 1.2-1.3, molybdenum disulphide powder 0.5-0.7, chromium powder 0.7-0.9, tungsten powder 0.2-0.4, niobium powder 0.02-0.03, graphite 1.1-1.4, polyamide wax micropowder 1.0-1.5, stearic acid 1.2-1.8.
Described powder metallurgy automobile transmission gear, it is characterized in that: take atomized iron powder as matrix, the weight percentage of all the other components is: carbonyl iron dust 5, copper powder 0.9, steel scrap powder 5, sulfuration manganese powder 1.25, molybdenum disulphide powder 0.6, chromium powder 0.8, tungsten powder 0.3, niobium powder 0.025, graphite 1.3, polyamide wax micropowder 1.3, stearic acid 1.5.
The preparation method of described powder metallurgy automobile transmission gear, is characterized in that comprising the following steps:
(1) by the weight portion of constitutive material, take each raw material, be crushed to 300-400 order, mix, then pack mould into, be placed on press, compressing;
(2) pressed compact after compressing is positioned over and in meshbeltfurnace, carries out successively multi-steps sintering, temperature 600-620 ℃, sintering 30-40 minute; Temperature 900-950 ℃, sintering 60-90 minute; Temperature temperature is controlled at 1200-1280 ℃, sintering 90-120 minute; Then be incubated 30 minutes at Quenching Treatment: 675-685 ℃, continue to be warming up to 905-915 ℃ of insulation 2 hours; At tempering: 370-420 ℃, be incubated 1 hour, coolingly carry out surface carburization processing, fine finishining, get product.
Advantage of the present invention:
The present invention utilizes steel scrap atomized powder, can turn waste into wealth, and twice laid, the gear of production, the high HRC=48-55 of tooth face hardness, wearability is good.Shock-resistant ability is good, and bearing capacity is higher.Can meet production requirement, be suitable for production fast in enormous quantities.
The specific embodiment
Embodiment 1: powder metallurgy automobile transmission gear, take atomized iron powder as matrix, and the weight percentage of all the other components is: carbonyl iron dust 5, copper powder 0.9, steel scrap powder 5, sulfuration manganese powder 1.25, molybdenum disulphide powder 0.6, chromium powder 0.8, tungsten powder 0.3, niobium powder 0.025, graphite 1.3, polyamide wax micropowder 1.3, stearic acid 1.5.Add up to absolutely.
Preparation method is as follows:
(1) by the weight portion of constitutive material, take each raw material, be crushed to 300-400 order, mix, then pack mould into, be placed on press, compressing;
(2) pressed compact after compressing is positioned over and in meshbeltfurnace, carries out successively multi-steps sintering, temperature 600-620 ℃, sintering 30-40 minute; Temperature 900-950 ℃, sintering 60-90 minute; Temperature temperature is controlled at 1200-1280 ℃, sintering 90-120 minute; Then be incubated 30 minutes at Quenching Treatment: 675-685 ℃, continue to be warming up to 905-915 ℃ of insulation 2 hours; At tempering: 370-420 ℃, be incubated 1 hour, coolingly carry out surface carburization processing, fine finishining, get product.
The performance detection data of the automobile gearbox gear making by the embodiment of the present invention 1:
Extract ten samples and detect, heat treatment hardness: HRC 48-55; Compressive resistance >=the 5840N of tooth portion, precision can reach H7, the transmission gear good processability that the present invention simultaneously produces, labor and material saving, process velocity promotes greatly.
Claims (2)
1. a powder metallurgy automobile transmission gear, it is characterized in that: take atomized iron powder as matrix, the weight percentage of all the other components is: carbonyl iron dust 4-6, copper powder 0.8-1.0, steel scrap powder 4-6, sulfuration manganese powder 1.2-1.3, molybdenum disulphide powder 0.5-0.7, chromium powder 0.7-0.9, tungsten powder 0.2-0.4, niobium powder 0.02-0.03, graphite 1.1-1.4, polyamide wax micropowder 1.0-1.5, stearic acid 1.2-1.8;
The preparation method of described powder metallurgy automobile transmission gear, comprises the following steps:
(1) by the weight portion of constitutive material, take each raw material, be crushed to 300-400 order, mix, then pack mould into, be placed on press, compressing;
(2) pressed compact after compressing is positioned over and in meshbeltfurnace, carries out successively multi-steps sintering, temperature 600-620 ℃, sintering 30-40 minute; Temperature 900-950 ℃, sintering 60-90 minute; Temperature is controlled at 1200-1280 ℃, sintering 90-120 minute; Then be incubated 30 minutes at Quenching Treatment: 675-685 ℃, continue to be warming up to 905-915 ℃ of insulation 2 hours; At tempering: 370-420 ℃, be incubated 1 hour, coolingly carry out surface carburization processing, fine finishining, get product.
2. powder metallurgy automobile transmission gear according to claim 1, it is characterized in that: take atomized iron powder as matrix, the weight percentage of all the other components is: carbonyl iron dust 5, copper powder 0.9, steel scrap powder 5, sulfuration manganese powder 1.25, molybdenum disulphide powder 0.6, chromium powder 0.8, tungsten powder 0.3, niobium powder 0.025, graphite 1.3, polyamide wax micropowder 1.3, stearic acid 1.5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210207400.0A CN102756122B (en) | 2012-06-21 | 2012-06-21 | Powder-metallurgy automobile transmission gear and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210207400.0A CN102756122B (en) | 2012-06-21 | 2012-06-21 | Powder-metallurgy automobile transmission gear and manufacturing method thereof |
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| CN102756122A CN102756122A (en) | 2012-10-31 |
| CN102756122B true CN102756122B (en) | 2014-04-02 |
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| CN201210207400.0A Active CN102756122B (en) | 2012-06-21 | 2012-06-21 | Powder-metallurgy automobile transmission gear and manufacturing method thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302464B (en) * | 2013-06-26 | 2015-06-10 | 天津市天瑞硬化工程有限公司 | Anti-fatigue manufacturing method of car transmission gear |
| CN103406536B (en) * | 2013-07-03 | 2015-12-09 | 安徽方兴实业有限公司 | A kind of powder metallurgy valve rod and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1104570A (en) * | 1993-05-18 | 1995-07-05 | 川崎制铁株式会社 | Atomised iron powder for powder metallurgy |
| CN1908211A (en) * | 2006-08-09 | 2007-02-07 | 海门市常乐粉末冶金厂 | Manufacture method of high-strength powder metallurgy bevel gear and copper seeping agent for the same |
| CN101214550A (en) * | 2008-01-04 | 2008-07-09 | 陆海雷 | Method for manufacturing small spiral bevel gear |
| CN102049523A (en) * | 2009-10-28 | 2011-05-11 | 鞍钢重型机械有限责任公司 | Free-cutting water-atomized steel powder and preparation method thereof |
-
2012
- 2012-06-21 CN CN201210207400.0A patent/CN102756122B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1104570A (en) * | 1993-05-18 | 1995-07-05 | 川崎制铁株式会社 | Atomised iron powder for powder metallurgy |
| CN1908211A (en) * | 2006-08-09 | 2007-02-07 | 海门市常乐粉末冶金厂 | Manufacture method of high-strength powder metallurgy bevel gear and copper seeping agent for the same |
| CN101214550A (en) * | 2008-01-04 | 2008-07-09 | 陆海雷 | Method for manufacturing small spiral bevel gear |
| CN102049523A (en) * | 2009-10-28 | 2011-05-11 | 鞍钢重型机械有限责任公司 | Free-cutting water-atomized steel powder and preparation method thereof |
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| CN102756122A (en) | 2012-10-31 |
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Inventor after: Wang Jian Inventor after: Xu Daosheng Inventor after: Mao Chengbin Inventor after: Li Gaihua Inventor after: Xu Xinming Inventor after: Yang Yu Inventor after: Wu Sheng Inventor after: Wang Wei Inventor after: Yin Jia Inventor after: Lu Hongyan Inventor before: Xu Daosheng |
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Free format text: CORRECT: INVENTOR; FROM: XU DAOSHENG TO: WANG JIAN MAO CHENGBIN LI GAIHUA XU XINMING YANG YU WU SHENG WANG WEI YIN JIA LU HONGYAN XU DAOSHENG |
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