CN103008644A - Gasoline engine piston powder metallurgical material - Google Patents
Gasoline engine piston powder metallurgical material Download PDFInfo
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- CN103008644A CN103008644A CN2012104931978A CN201210493197A CN103008644A CN 103008644 A CN103008644 A CN 103008644A CN 2012104931978 A CN2012104931978 A CN 2012104931978A CN 201210493197 A CN201210493197 A CN 201210493197A CN 103008644 A CN103008644 A CN 103008644A
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Abstract
The invention relates to a gasoline engine piston powder metallurgical material. The gasoline engine piston powder metallurgical material comprises the following components in percentage by weight: 1.2 to 1.5 percent of copper, 0.8 to 1.2 percent of graphite, 0.3 to 0.5 percent of molybdenum disulfide, 0.3 to 0.5 percent of vanadium steel comprising 8 weight percent of vanadium, 0.4 to 0.7 percent of additive, 0.5 to 0.8 percent of lubricating agent and the balance of iron, and also comprises engine oil which is 0.2 to 0.6 percent of the weight of the components.
Description
Technical field
The invention belongs to field of powder metallurgy, refer to especially a kind of gasoline engine piston powdered metallurgical material.
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:
The gasoline engine piston powdered metallurgical material, it forms by weight, and percentage composition includes, 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%.
Described lubricant is the stearic amide series lubricant agent.
Described 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.
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
The gasoline engine piston powdered metallurgical material, it forms by weight, and percentage composition includes, 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.
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%;
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
The gasoline engine piston powdered metallurgical material, it forms by weight, and percentage composition includes, 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.
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%;
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
The gasoline engine piston powdered metallurgical material, it forms by weight, and percentage composition includes, 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.
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%;
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 (2)
1. gasoline engine piston powdered metallurgical material, it is characterized in that: it forms by weight that percentage composition includes, 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%.
2. gasoline engine piston powdered metallurgical material according to claim 1, it is characterized in that: described lubricant is the stearic amide series lubricant agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104931978A CN103008644A (en) | 2012-11-22 | 2012-11-22 | Gasoline engine piston powder metallurgical material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104931978A CN103008644A (en) | 2012-11-22 | 2012-11-22 | Gasoline engine piston powder metallurgical material |
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| CN103008644A true CN103008644A (en) | 2013-04-03 |
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Cited By (6)
| 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 |
| CN103736989A (en) * | 2014-01-15 | 2014-04-23 | 涂秀琼 | Iron-based powder metallurgical combination and preparation method thereof |
| CN104084577A (en) * | 2014-07-18 | 2014-10-08 | 常熟市迅达粉末冶金有限公司 | Powder metallurgy material |
| CN108160985A (en) * | 2017-12-27 | 2018-06-15 | 洛阳神佳窑业有限公司 | A kind of novel powder metallurgy material |
| CN108160984A (en) * | 2017-12-27 | 2018-06-15 | 洛阳神佳窑业有限公司 | A kind of powdered metallurgical material |
Citations (4)
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| CN86104179A (en) * | 1986-07-01 | 1987-04-29 | 铁道部科学研究院机车车辆研究所 | Powder metallurgy cylinder packing and process |
| JPH0285338A (en) * | 1988-09-20 | 1990-03-26 | Komatsu Ltd | Ferrous sintered sliding material |
| US5484662A (en) * | 1993-07-06 | 1996-01-16 | Ford Motor Company | Solid lubricant and hardenable steel coating system |
| CN101269416A (en) * | 2008-05-09 | 2008-09-24 | 徐信国 | Powder metallurgy member for piston supporting base of power cylinder and method for manufacturing same |
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2012
- 2012-11-22 CN CN2012104931978A patent/CN103008644A/en active Pending
Patent Citations (4)
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|---|---|---|---|---|
| CN86104179A (en) * | 1986-07-01 | 1987-04-29 | 铁道部科学研究院机车车辆研究所 | Powder metallurgy cylinder packing and process |
| JPH0285338A (en) * | 1988-09-20 | 1990-03-26 | Komatsu Ltd | Ferrous sintered sliding material |
| US5484662A (en) * | 1993-07-06 | 1996-01-16 | Ford Motor Company | Solid lubricant and hardenable steel coating system |
| CN101269416A (en) * | 2008-05-09 | 2008-09-24 | 徐信国 | Powder metallurgy member for piston supporting base of power cylinder and method for manufacturing same |
Non-Patent Citations (2)
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| "二硫化钼在汽车上的应用", 《汽车技术》, no. 06 * |
| 锡淦等: "国外钒的应用概况", 《世界有色金属》, no. 02, 23 February 2000 (2000-02-23) * |
Cited By (7)
| 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 |
| CN103736989A (en) * | 2014-01-15 | 2014-04-23 | 涂秀琼 | Iron-based powder metallurgical combination and preparation method thereof |
| CN104084577A (en) * | 2014-07-18 | 2014-10-08 | 常熟市迅达粉末冶金有限公司 | Powder metallurgy material |
| CN108160985A (en) * | 2017-12-27 | 2018-06-15 | 洛阳神佳窑业有限公司 | A kind of novel powder metallurgy material |
| CN108160984A (en) * | 2017-12-27 | 2018-06-15 | 洛阳神佳窑业有限公司 | A kind of powdered metallurgical material |
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Application publication date: 20130403 |