CN103008645A - Preparation method for piston powder metallurgy material of gasoline engine - Google Patents
Preparation method for piston powder metallurgy material of gasoline engine Download PDFInfo
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- CN103008645A CN103008645A CN2012104934035A CN201210493403A CN103008645A CN 103008645 A CN103008645 A CN 103008645A CN 2012104934035 A CN2012104934035 A CN 2012104934035A CN 201210493403 A CN201210493403 A CN 201210493403A CN 103008645 A CN103008645 A CN 103008645A
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- lubricant
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- gasoline engine
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- 239000000463 material Substances 0.000 title claims abstract description 18
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000314 lubricant Substances 0.000 claims abstract description 26
- 239000010721 machine oil Substances 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 12
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium(0) Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000000654 additive Substances 0.000 claims abstract description 6
- 230000000996 additive Effects 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 6
- 239000010439 graphite Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 34
- 229910052757 nitrogen Inorganic materials 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 239000011733 molybdenum Substances 0.000 claims description 5
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical class CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 claims description 5
- 230000001629 suppression Effects 0.000 claims description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N Molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Abstract
The invention relates to a preparation method for piston powder metallurgy material of a gasoline engine, which comprises the ingredients by weight percent: 1.2-0.5 percent of copper, 0.8-1.2 percent of graphite, 0.3-0.5 percent of molybdenum disulfide, 0.3-0.6 percent of vanadium steel with 8 percent vanadium, 0.4-0.7 percent of additive, 0.5-0.8 percent of lubricant, and the balance of iron, and further comprises a machine oil about 0.2-0.6 percent of gross weight of the total weight. Due to the adoption of the technical scheme, the piston powder metallurgy material is improved in quality, good in tightness under the condition of high temperature and stable in working performance.
Description
Technical field
The invention belongs to field of powder metallurgy, refer to especially a kind of gasoline engine piston powdered metallurgical material preparation method.
Background technology
What present engine body adopted is the casting processing mode, but for the supporting piston seat of engine or made by the machining mode.Because the dimensional requirement precision of engine piston is high, complex process needs high precision machine tool to make, and the problem of precision deficiency still is commonplace phenomenon.
Powder metallurgy has time processing machine-shaping, does not need the processing technology of later stage multiple working procedure, to the requirement of raw material characteristics flexibly, more and more is subject to the attention of foundry industry simultaneously.Therefore, adopt powder metallurgy to make the engine piston seat and become possibility.But the precision of the powder metallurgy product of existing technology is not high, and air tightness does not reach requirement.
Prior art proposes the PM technique that a kind of powder metallurgy is made the engine piston seat, but the air tightness of the piston seat that this technology makes is defectiveness still, and hot property is not high, can't satisfy the engine piston seat fully and will bear high temperature and guarantee bubble-tight requirement.
Summary of the invention
The purpose of this invention is to provide a kind of gasoline engine piston seat powdered metallurgical material and preparation method, pass through the technical program, improved the quality of product, product air-tightness under high-temperature condition is good, the gasoline engine piston seat powdered metallurgical material of stable work in work.
The present invention is achieved by the following technical solutions:
Gasoline engine piston powdered metallurgical material preparation method is:
Batching, percentage composition includes by weight, the additive of the molybdenum bisuphide of the copper of 1.2-1.5%, the graphite of 0.8-1.2%, 0.3-0.5%, the vanadium steel that contains vanadium 8% percentage by weight of 0.3-0.5%, 0.4-0.7%, the lubricant of 0.5-0.8% and the iron of surplus also comprise the machine oil that forms gross weight 0.2-0.6%;
Mix, calculate constitutive material after, except lubricant and machine oil, all grind powdered, then add lubricant and machine oil in batch mixer batch mixing 45-60 minute;
30-60 second is suppressed in compacting under 650-800MPa pressure;
Sintering, in the powder metallurgy stove of special use at 750-850 ℃ of presintering 1-2 hour, shaping and again extruding under 200-300MPa pressure under this temperature, under 1080-1150 ℃ of temperature sintering 3-5 hour, then at the uniform velocity cooling is processed, and cooling rate is for being no more than 5 ℃/minute;
Heat treatment is risen again during to 600-650 ℃ when drop in temperature, adds nitrogen treatment 5 hours with water vapour, and this moment, holding temperature was 600-650 ℃, then was cooled to normal temperature.
Described lubricant is the stearic amide series lubricant agent.
The pressure that described water vapour adds nitrogen is 0.2-0.5MPa.
Described nitrogen accounts for the volume content that water vapour adds nitrogen 10-15% under 1 atmospheric pressure.
The beneficial effect that the present invention compares with prior art is:
By the technical program, improved the quality of product, product air-tightness under high-temperature condition is good, the gasoline engine piston seat powdered metallurgical material of stable work in work.
The specific embodiment
Describe by the following examples technical scheme of the present invention in detail, should be understood that, following embodiment only can be used for explaining technical scheme of the present invention and can not be interpreted as is restriction to technical solution of the present invention.
Embodiment 1
Described preparation method is:
Batching, percentage composition includes by weight, 1.2% copper, 0.8% graphite, 0.3% molybdenum bisuphide, 0.3% the vanadium steel that contains vanadium 8% percentage by weight, 0.4% additive, 0.5% lubricant and the iron of surplus also comprise the machine oil that forms gross weight 0.2%; Described lubricant is the stearic amide series lubricant agent;
Mix, calculate constitutive material after, except lubricant and machine oil, all grind powdered, then add lubricant and machine oil batch mixing 45 minutes in batch mixer;
Compacting, compacting is 30 seconds under 700MPa pressure;
Sintering, 750-850 ℃ of presintering 1.5 hours, in shaping and again extruding under 200MPa pressure under this temperature, sintering was 3 hours under 1080-1150 ℃ of temperature in the powder metallurgy stove of special use, then at the uniform velocity cooling is processed, and cooling rate is for being no more than 5 ℃/minute;
Heat treatment is risen again during to 600-650 ℃ when drop in temperature, is that the 0.3MPa water vapour added nitrogen treatment 5 hours with pressure, and this moment, holding temperature was 600-650 ℃, then was cooled to normal temperature; Described nitrogen accounts for the volume content that water vapour adds nitrogen 10-15% under 1 atmospheric pressure.
Embodiment 2
Described preparation method is:
Batching, percentage composition includes by weight, 1.5% copper, 1.2% graphite, 0.5% molybdenum bisuphide, 0.5% the vanadium steel that contains vanadium 8% percentage by weight, 0.7% additive, 0.8% lubricant and the iron of surplus also comprise the machine oil that forms gross weight 0.6%; Described lubricant is the stearic amide series lubricant agent;
Mix, calculate constitutive material after, except lubricant and machine oil, all grind powdered, then add lubricant and machine oil batch mixing 45 minutes in batch mixer;
Compacting, compacting is 40 seconds under 750MPa pressure;
Sintering, 750-850 ℃ of presintering 2 hours, in shaping and again extruding under 200MPa pressure under this temperature, sintering was 3 hours under 1080-1150 ℃ of temperature in the powder metallurgy stove of special use, and then at the uniform velocity cooling is processed, and cooling rate is for being no more than 5 ℃/minute;
Heat treatment is risen again during to 600-650 ℃ when drop in temperature, is that the 0.5MPa water vapour added nitrogen treatment 5 hours with pressure, and this moment, holding temperature was 600-650 ℃, then was cooled to normal temperature; Described nitrogen accounts for the volume content that water vapour adds nitrogen 10-15% under 1 atmospheric pressure.
Embodiment 3
Described preparation method is:
Batching, percentage composition includes by weight, 1.3% copper, 1.0% graphite, 0.4% molybdenum bisuphide, 0.4% the vanadium steel that contains vanadium 8% percentage by weight, 0.5% additive, 0.6% lubricant and the iron of surplus also comprise the machine oil that forms gross weight 0.4%; Described lubricant is the stearic amide series lubricant agent;
Mix, calculate constitutive material after, except lubricant and machine oil, all grind powdered, then add lubricant and machine oil batch mixing 45 minutes in batch mixer;
Compacting, compacting is 30 seconds under 800MPa pressure;
Sintering, 750-850 ℃ of presintering 2 hours, in shaping and again extruding under 300MPa pressure under this temperature, sintering was 4 hours under 1080-1150 ℃ of temperature in the powder metallurgy stove of special use, and then at the uniform velocity cooling is processed, and cooling rate is for being no more than 5 ℃/minute;
Heat treatment is risen again during to 600-650 ℃ when drop in temperature, is that the 0.4MPa water vapour added nitrogen treatment 5 hours with pressure, and this moment, holding temperature was 600-650 ℃, then was cooled to normal temperature; Described nitrogen accounts for the volume content that water vapour adds nitrogen 10-15% under 1 atmospheric pressure.
Claims (4)
1. gasoline engine piston powdered metallurgical material preparation method is characterized in that:
Batching, percentage composition includes by weight, the additive of the molybdenum bisuphide of the copper of 1.2-1.5%, the graphite of 0.8-1.2%, 0.3-0.5%, the vanadium steel that contains vanadium 8% percentage by weight of 0.3-0.5%, 0.4-0.7%, the lubricant of 0.5-0.8% and the iron of surplus also comprise the machine oil that forms gross weight 0.2-0.6%;
Mix, calculate constitutive material after, except lubricant and machine oil, all grind powdered, then add lubricant and machine oil in batch mixer batch mixing 45-60 minute;
30-60 second is suppressed in compacting under 650-800MPa pressure;
Sintering, in the powder metallurgy stove of special use at 750-850 ℃ of presintering 1-2 hour, shaping and again extruding under 200-300MPa pressure under this temperature, under 1080-1150 ℃ of temperature sintering 3-5 hour, then at the uniform velocity cooling is processed, and cooling rate is for being no more than 5 ℃/minute;
Heat treatment is risen again during to 600-650 ℃ when drop in temperature, adds nitrogen treatment 5 hours with water vapour, and this moment, holding temperature was 600-650 ℃, then was cooled to normal temperature.
2. gasoline engine piston powdered metallurgical material preparation method according to claim 1, it is characterized in that: described lubricant is the stearic amide series lubricant agent.
3. gasoline engine piston powdered metallurgical material preparation method according to claim 1, it is characterized in that: the pressure that described water vapour adds nitrogen is 0.2-0.5MPa.
4. gasoline engine piston powdered metallurgical material preparation method according to claim 1, it is characterized in that: described nitrogen accounts for the volume content that water vapour adds nitrogen 10-15% under 1 atmospheric pressure.
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| CN2012104934035A CN103008645A (en) | 2012-11-22 | 2012-11-22 | Preparation method for piston powder metallurgy material of gasoline engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104934035A CN103008645A (en) | 2012-11-22 | 2012-11-22 | Preparation method for piston powder metallurgy material of gasoline engine |
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| CN103008645A true CN103008645A (en) | 2013-04-03 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014502A (en) * | 2012-11-22 | 2013-04-03 | 宁波市群星粉末冶金有限公司 | Powdery metallurgy material for automobile engine piston and preparation method |
| CN103357861A (en) * | 2013-06-21 | 2013-10-23 | 马鞍山市恒毅机械制造有限公司 | Powder metallurgy material of gasoline engine piston and preparation method of powder metallurgy material |
| CN103409691A (en) * | 2013-07-02 | 2013-11-27 | 安徽瑞泰汽车零部件有限责任公司 | Powder metallurgy tool steel and preparation method thereof |
| CN103451547A (en) * | 2013-07-26 | 2013-12-18 | 安庆市德奥特汽车零部件制造有限公司 | High-strength powder metallurgy piston ring material and preparation method thereof |
| CN103451572A (en) * | 2013-07-26 | 2013-12-18 | 安庆市德奥特汽车零部件制造有限公司 | Powder metallurgic piston ring material with good abrasion resistance and preparation method thereof |
| CN105478785A (en) * | 2015-11-25 | 2016-04-13 | 芜湖市鸿坤汽车零部件有限公司 | Preparation method of engine piston through powder metallurgy |
| CN107470634A (en) * | 2017-07-28 | 2017-12-15 | 宁波金钟粉末冶金有限公司 | Shock absorber piston |
| CN110792756A (en) * | 2019-10-19 | 2020-02-14 | 山西东睦华晟粉末冶金有限公司 | Combined brazing sintered sprocket and preparation method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014502A (en) * | 2012-11-22 | 2013-04-03 | 宁波市群星粉末冶金有限公司 | Powdery metallurgy material for automobile engine piston and preparation method |
| CN103357861A (en) * | 2013-06-21 | 2013-10-23 | 马鞍山市恒毅机械制造有限公司 | Powder metallurgy material of gasoline engine piston and preparation method of powder metallurgy material |
| CN103357861B (en) * | 2013-06-21 | 2016-07-20 | 安徽吉思特智能装备有限公司 | A kind of piston powder metallurgy material of gasoline engine and preparation method thereof |
| CN103409691B (en) * | 2013-07-02 | 2015-10-21 | 安徽瑞泰汽车零部件有限责任公司 | A kind of powder metallurgy tool steel and preparation method thereof |
| CN103409691A (en) * | 2013-07-02 | 2013-11-27 | 安徽瑞泰汽车零部件有限责任公司 | Powder metallurgy tool steel and preparation method thereof |
| CN103451547A (en) * | 2013-07-26 | 2013-12-18 | 安庆市德奥特汽车零部件制造有限公司 | High-strength powder metallurgy piston ring material and preparation method thereof |
| CN103451547B (en) * | 2013-07-26 | 2016-01-06 | 安庆市德奥特汽车零部件制造有限公司 | A kind of high-strength powder metallurgical piston ring material and preparation method thereof |
| CN103451572B (en) * | 2013-07-26 | 2016-01-06 | 安庆市德奥特汽车零部件制造有限公司 | P/M piston rings material that a kind of wear resistance is good and preparation method thereof |
| CN103451572A (en) * | 2013-07-26 | 2013-12-18 | 安庆市德奥特汽车零部件制造有限公司 | Powder metallurgic piston ring material with good abrasion resistance and preparation method thereof |
| CN105478785A (en) * | 2015-11-25 | 2016-04-13 | 芜湖市鸿坤汽车零部件有限公司 | Preparation method of engine piston through powder metallurgy |
| CN107470634A (en) * | 2017-07-28 | 2017-12-15 | 宁波金钟粉末冶金有限公司 | Shock absorber piston |
| CN107470634B (en) * | 2017-07-28 | 2019-07-26 | 宁波金钟粉末冶金有限公司 | Shock absorber piston |
| CN110792756A (en) * | 2019-10-19 | 2020-02-14 | 山西东睦华晟粉末冶金有限公司 | Combined brazing sintered sprocket and preparation method thereof |
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Application publication date: 20130403 |