CN104084589B - A kind of powder metallurgy automobile hub-bearing unit - Google Patents
A kind of powder metallurgy automobile hub-bearing unit Download PDFInfo
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- CN104084589B CN104084589B CN201410247391.7A CN201410247391A CN104084589B CN 104084589 B CN104084589 B CN 104084589B CN 201410247391 A CN201410247391 A CN 201410247391A CN 104084589 B CN104084589 B CN 104084589B
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Abstract
The invention discloses a kind of powder metallurgy automobile hub-bearing unit, be made up of the raw material of following weight portion: 25-32 part hard phase, the bonding phase of 17-20 part, 3-5 part suppresses phase, 45-50 part alloy phase, 4-6 part lubricant forms, by above-mentioned raw materials through whipping step, pressing step, sintering step, heat treatment step, Vehicle Processing step, surface treatment step obtains automobile hub bearing product, 4.5 ~ 5.5h is sintered in sintering furnace in sintering step, the invention provides a kind of quality good, stability is strong, powder metallurgy automobile hub-bearing unit applied widely.
Description
Technical field
The present invention relates to a kind of powder metallurgy automobile hub-bearing unit, and this powder metallurgy automobile hub-bearing unit is manufactured the technique of product.
Background technology
Existing powder metallurgy automobile hub-bearing unit production technology mostly is: stir the operations such as material-shaping-sintering-Vehicle Processing-heat treatment-vibro-grinding-packaging.In this kind of technique, a lot of company, in order to reduce cost, adopts and simplifies formula or reduce the modes such as technique, provides cost savings although simplify formula, ensures can lack properties of product quality.Be shaped because powder metallurgy automobile hub-bearing unit belongs to graininess, reduce the number of formula and easily causing when machined accessory turning face crude, affecting glossiness, serious appearance easy fracture phenomenon, affecting product service life.
Summary of the invention
For the problems referred to above, the object of this invention is to provide the powder metallurgy automobile hub-bearing unit that a kind of quality is good, stability is strong, applied widely.
Technical scheme of the present invention is as follows:
A kind of powder metallurgy automobile hub-bearing unit, be made up of the raw material of following weight portion: 25-32 part hard phase, the bonding phase of 17-20 part, 3-5 part suppresses phase, 45-50 part alloy phase, 4-6 part lubricant forms, by above-mentioned raw materials through whipping step, pressing step, sintering step, heat treatment step, Vehicle Processing step, surface treatment step obtains automobile hub bearing product, 4.5 ~ 5.5h is sintered in sintering furnace in sintering step, vacuum-0.25 ~-0.15Pa, sintering furnace temperature 950 DEG C ~ 1080 DEG C, through hot water wash after sinter molding, oxide film dissolving, passivation, cooling, deburring, obtain automobile hub bearing, automobile hub bearing is carried out means of isothermal quenching and annealing, described means of isothermal quenching, adopt 550 ± 20 DEG C of means of isothermal quenching, what means of isothermal quenching adopted is nitrate salt bath austempering, nitrate is calcium nitrate and sodium nitrate is the ratio of 3: 4 with weight ratio, then automobile hub bearing is placed in temperature lower than in the annealing furnace of 250 DEG C, is warmed up to 650 ± 10 DEG C, is incubated 40 ± 5 minutes, obtains automobile hub bearing finished product,
Described hard phase is made up of the raw material of following mass percent: 9-10% tungsten nitride, 6-8% ramet, 1.2-2.5% niobium carbide, 0.6-0.9% neodymium, surplus are silicon nitride; Described alloy phase is made up of the raw material of following mass percent: 15-20%NbC, 15-18% anatase titania, 12-14% iron powder, 5-8% copper powder, 12-18% zirconium dioxide, surplus are neodymium, after above-mentioned raw materials is mixed, add mixture gross mass 22-25% ethanol as abrasive media, add mixture gross mass 8-10% surfactant, after grinding drying in 6-8 hour, sinter 3-5 hour at 950-1050 DEG C, continue grinding and obtain 70-80 μm of powder.
Beneficial effect of the present invention:
Compared with prior art, advantage of the present invention adopts special pulp furnish, makes the product performance index produced high, glossiness is good, good stability, not easily occurs the phenomenons such as fracture, long service life, applied widely, can be used for producing gear, inner and outer rotors, force-output shaft etc.
Detailed description of the invention
Below in conjunction with specific embodiment, illustrate the present invention further, these embodiments should be understood only for illustration of the present invention
A kind of powder metallurgy automobile hub-bearing unit, be made up of the raw material of following weight portion: 25-32 part hard phase, the bonding phase of 17-20 part, 3-5 part suppresses phase, 45-50 part alloy phase, 4-6 part lubricant forms, by above-mentioned raw materials through whipping step, pressing step, sintering step, heat treatment step, Vehicle Processing step, surface treatment step obtains automobile hub bearing product, 4.5 ~ 5.5h is sintered in sintering furnace in sintering step, vacuum-0.25 ~-0.15Pa, sintering furnace temperature 950 DEG C ~ 1080 DEG C, through hot water wash after sinter molding, oxide film dissolving, passivation, cooling, deburring, obtain automobile hub bearing, automobile hub bearing is carried out means of isothermal quenching and annealing, described means of isothermal quenching, adopt 550 ± 20 DEG C of means of isothermal quenching, what means of isothermal quenching adopted is nitrate salt bath austempering, nitrate is calcium nitrate and sodium nitrate is the ratio of 3: 4 with weight ratio, then automobile hub bearing is placed in temperature lower than in the annealing furnace of 250 DEG C, is warmed up to 650 ± 10 DEG C, is incubated 40 ± 5 minutes, obtains automobile hub bearing finished product,
Described hard phase is made up of the raw material of following mass percent: 9-10% tungsten nitride, 6-8% ramet, 1.2-2.5% niobium carbide, 0.6-0.9% neodymium, surplus are silicon nitride; Described alloy phase is made up of the raw material of following mass percent: 15-20%NbC, 15-18% anatase titania, 12-14% iron powder, 5-8% copper powder, 12-18% zirconium dioxide, surplus are neodymium, after above-mentioned raw materials is mixed, add mixture gross mass 22-25% ethanol as abrasive media, add mixture gross mass 8-10% surfactant, after grinding drying in 6-8 hour, sinter 3-5 hour at 950-1050 DEG C, continue grinding and obtain 70-80 μm of powder.
According to the powder metallurgy automobile hub-bearing unit material that the present invention produces, experimental data is as shown in the table:
Tensile strength sigma b (MPa): >=1020, yield strength σ s (MPa): >=900, percentage elongation δ 5 (%): >=15, contraction percentage of area ψ (%): >=47, Impact energy Ak v (J): >=60, notched bar impact strength α kv (J/cm2): >=63.
Claims (1)
1. a powder metallurgy automobile hub-bearing unit, it is characterized in that: be made up of the raw material of following weight portion: 25-32 part hard phase, the bonding phase of 17-20 part, 3-5 part suppresses phase, 45-50 part alloy phase, 4-6 part lubricant forms, by above-mentioned raw materials through whipping step, pressing step, sintering step, heat treatment step, Vehicle Processing step, surface treatment step obtains automobile hub bearing product, 4.5 ~ 5.5h is sintered in sintering furnace in sintering step, vacuum-0.25 ~-0.15Pa, sintering furnace temperature 950 DEG C ~ 1080 DEG C, through hot water wash after sinter molding, oxide film dissolving, passivation, cooling, deburring, obtain automobile hub bearing, automobile hub bearing is carried out means of isothermal quenching and annealing, described means of isothermal quenching, adopt 550 ± 20 DEG C of means of isothermal quenching, what means of isothermal quenching adopted is nitrate salt bath austempering, nitrate is calcium nitrate and sodium nitrate is the ratio of 3: 4 with weight ratio, then automobile hub bearing is placed in temperature lower than in the annealing furnace of 250 DEG C, is warmed up to 650 ± 10 DEG C, is incubated 40 ± 5 minutes, obtains automobile hub bearing finished product,
Described hard phase is made up of the raw material of following mass percent: 9-10% tungsten nitride, 6-8% ramet, 1.2-2.5% niobium carbide, 0.6-0.9% neodymium, surplus are silicon nitride; Described alloy phase is made up of the raw material of following mass percent: 15-20%NbC, 15-18% anatase titania, 12-14% iron powder, 5-8% copper powder, 12-18% zirconium dioxide, surplus are neodymium, after above-mentioned raw materials is mixed, add mixture gross mass 22-25% ethanol as abrasive media, add mixture gross mass 8-10% surfactant, after grinding drying in 6-8 hour, sinter 3-5 hour at 950-1050 DEG C, continue grinding and obtain 70-80 μm of powder.
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| CN201410247391.7A CN104084589B (en) | 2014-06-06 | 2014-06-06 | A kind of powder metallurgy automobile hub-bearing unit |
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| CN201410247391.7A CN104084589B (en) | 2014-06-06 | 2014-06-06 | A kind of powder metallurgy automobile hub-bearing unit |
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| CN104084589B true CN104084589B (en) | 2015-12-30 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316602A (en) * | 2015-11-04 | 2016-02-10 | 合肥海源机械有限公司 | Preparation method for high-strength forklift portal frame |
| CN105483500A (en) * | 2015-11-25 | 2016-04-13 | 芜湖市鸿坤汽车零部件有限公司 | Preparation method of automobile engine cylinder block |
| CN105478774A (en) * | 2015-11-25 | 2016-04-13 | 芜湖市鸿坤汽车零部件有限公司 | Preparation method of protective steel plate for automobile chassis |
| CN105478779A (en) * | 2015-11-25 | 2016-04-13 | 芜湖市鸿坤汽车零部件有限公司 | Method for preparing engine crankshaft connecting rod bypowder metallurgyprocess |
| CN105665696A (en) * | 2016-02-23 | 2016-06-15 | 桐乡市搏腾贸易有限公司 | Nanometer silicon nitride bearing material for machinery and preparation method thereof |
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| JP2000169903A (en) * | 1998-12-07 | 2000-06-20 | Sanyo Special Steel Co Ltd | Manufacture of hydrogen storage alloy powder |
| CN101259528A (en) * | 2008-01-17 | 2008-09-10 | 王哲 | Non magnetic cemented carbide powder with nickel-vanadium alloys as binder phase and preparation |
| CN101381836A (en) * | 2008-10-27 | 2009-03-11 | 王铀 | Nano modified WC/Co cemented carbide material and manufacturing method thereof |
| CN101486098A (en) * | 2008-01-17 | 2009-07-22 | 东睦新材料集团股份有限公司 | Method for preparing high-hardness wear-resistant powder metallurgical rolling sleeve |
| CN102825255A (en) * | 2012-09-21 | 2012-12-19 | 常熟市华德粉末冶金有限公司 | Production method for drive shaft of powder metallurgy planetary gear |
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2014
- 2014-06-06 CN CN201410247391.7A patent/CN104084589B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000169903A (en) * | 1998-12-07 | 2000-06-20 | Sanyo Special Steel Co Ltd | Manufacture of hydrogen storage alloy powder |
| CN101259528A (en) * | 2008-01-17 | 2008-09-10 | 王哲 | Non magnetic cemented carbide powder with nickel-vanadium alloys as binder phase and preparation |
| CN101486098A (en) * | 2008-01-17 | 2009-07-22 | 东睦新材料集团股份有限公司 | Method for preparing high-hardness wear-resistant powder metallurgical rolling sleeve |
| CN101381836A (en) * | 2008-10-27 | 2009-03-11 | 王铀 | Nano modified WC/Co cemented carbide material and manufacturing method thereof |
| CN102825255A (en) * | 2012-09-21 | 2012-12-19 | 常熟市华德粉末冶金有限公司 | Production method for drive shaft of powder metallurgy planetary gear |
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Inventor after: Wang Xingsong Inventor after: Xu Feiyun Inventor after: Luo Xiang Inventor after: Dai Ting Inventor after: Zhang Gongguo Inventor before: Zhang Gongguo Inventor before: Wang Jingwen Inventor before: Duan Zongyin Inventor before: Li Chunjin Inventor before: Chen Chao Inventor before: Wang Shuyan Inventor before: Zhang Shaowu Inventor before: Wang Xiaofen Inventor before: Xie Yong |
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Effective date of registration: 20151022 Address after: Taibai Industrial Park, 243100 Anhui city of Ma'anshan province Dangtu County Applicant after: ANHUI JISITE INTELLIGENT EQUIPMENT CO., LTD. Address before: Taibai Industrial Park, 243181 Anhui city of Ma'anshan province Dangtu County Applicant before: Maanshan Machinery Manufacturing Co., Ltd. |
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