CN103231061A - Powder metallurgy synchronous wheel and preparation method thereof - Google Patents
Powder metallurgy synchronous wheel and preparation method thereof Download PDFInfo
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- CN103231061A CN103231061A CN201310107615XA CN201310107615A CN103231061A CN 103231061 A CN103231061 A CN 103231061A CN 201310107615X A CN201310107615X A CN 201310107615XA CN 201310107615 A CN201310107615 A CN 201310107615A CN 103231061 A CN103231061 A CN 103231061A
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Abstract
The invention provides a powder metallurgy synchronous wheel which is formed by compressing the following power stocks in part by weight: 100 parts of iron powder, 1.8 to 2.0 parts of copper powder, 0.5 to 0.8 part of molybdenum powder, 0.1 to 0.3 part of tungsten powder,0.8 to 1.2 part of nickel powder, 0.5 to 0.8 part of graphite powder, 0.1 to 0.3 part of modified wood ash, 0.2 to 0.6 part of lithium stearate, 0.1 to 0.3 part of zinc stearate, 0.1 to 0.2 part of ethylene bis stearamide, 0.1 to 0.3 part of molybdenum disulfide, 0.2 to 0.4 part of aluminium oxide,0.2 to 0.4 part of calcium fluoride and 0.4 to 0.5 part of liF. When in preparation, mixing the powder stocks stepwise firstly, and obtaining the finished product synchronous wheel through compressing and manufacturing, sintering, heat treatment and surface treatment. The produced powder metallurgy synchronous wheel has the advantages that the synchronous wheel is good in abrasion resistance, high in strength and rigidity, good in machinability, is corrosion resistant and less susceptible to breakage, and has a long service life.
Description
Technical field
The present invention relates to field of powder metallurgy, be specifically related to a kind of powder metallurgy synchronizing wheel and preparation method thereof.
Background technology
PM technique can reduce the cutting cost significantly with the parts of the shape production requirement high dimensional accuracy extremely close with article shape, complicated shape.Therefore, sintered metal product is as the parts of various machineries, device and utilize in many-side.
Generally speaking, alloy such as mixing graphite powder is with lubricant powders such as powder and stearic acid, zinc stearates and after forming the iron-based powder mixed powder in the iron-based powder, this iron-based powder mixed powder is filled into metal die, press molding and make powder metallurgical with iron-based powder formed body (press-powder body).Wherein, iron-based powder can be divided into iron powder (straight iron powder etc.), powdered alloy steel etc. according to composition.And iron-based powder also can be divided into atomized iron powder, reduced iron powder etc. according to manufacture method.The density of iron-based powder formed body is generally 6.6-7.1 mg/m3.Further implement sintering processes and form sintered body for these iron-based powder formed bodies, and implement finishing, machining as required and form sintered metal product.When needing to improve hot strength, fatigue strength, also implement carburizing heat treatment, brightness heat treatment behind the sintering.But existing powdered metal parts is because the proportion difference of various raw materials in the prescription, be difficult to guarantee during mixing to mix, cause the density unevenness of the green compact that are pressed into even, by heat treatment, the global density of the part of gained is inhomogeneous, causes every mechanical property bad.
Summary of the invention
The invention provides a kind of powder metallurgy synchronizing wheel and preparation method thereof, with special raw material proportioning and the technology of science, produce the powder metallurgy synchronizing wheel to have wearability good, intensity height, hardness height, machinability are good, corrosion-resistant, be not prone to fracture, the characteristics of long service life.
The technical solution used in the present invention is as follows:
A kind of powder metallurgy synchronizing wheel, it is characterized in that, suppressed forming by the powder stock of following weight portion: iron powder 100, copper powder 1.8-2.0, molybdenum powder 0.5-0.8, tungsten powder 0.1-0.3, nickel powder 0.8-1.2, graphite powder 0.5-0.8, modification trees ashes 0.1-0.3, lithium stearate 0.2-0.6, zinc stearate 0.1-0.3, ethylene bis stearic acid amide 0.1-0.2, molybdenum bisuphide 0.1-0.3, alundum (Al 0.2-0.4, calcirm-fluoride 0.2-0.4, LiF 0.4-0.5.
The preparation method of described powder metallurgy synchronizing wheel is characterized in that, may further comprise the steps:
(1) at first the base-material iron powder of 40-50% is packed in the high-speed mixer, to the silane coupler KH-560 that wherein adds base-material iron powder quality 0.3-0.6%, high-speed stirred 5-6 minute, then with copper powder, molybdenum powder, tungsten powder, nickel powder, graphite powder, modification trees ashes powder, zinc stearate, ethylene bis stearic acid amide and remaining iron powder add wherein successively, the heating of high-speed mixing limit, limit, when temperature is raised to 130-135 ℃, all the other components in will filling a prescription all add wherein, continue again to mix 8-10 minute, allow its cooling then, obtain the uniform iron base powder mixture of density end;
(2) pack in the mould in the iron base powder mixture end that step (1) is obtained, press forming under 550-580Mpa pressure;
(3) green compact of press forming are placed in the sintering furnace, in the protective atmosphere of hydrogen and nitrogen mixture body, it is 1115～1125 ℃ in temperature at first, sintering time is 10-20 minute, then with 10-20 ℃/minute speed rising temperature to 1250-1300 ℃, under this temperature, knot 10-15 minute reburns, room temperature is down in cooling then, is carrying out fine finishining;
(4) carry out Quenching Treatment after the heat treatment fine finishining again, hardening heat is 825～835 ℃, cool time 2-3 hour; Under 540-550 ℃, carry out high tempering then and handle, be incubated 1.5-2 hour; Carry out lonneal at 155～165 ℃ then, 2-3 hour;
(5) gas nitriding, the powder metallurgy synchronizing wheel after the lonneal were oozed 50 minutes under 700 ℃ of blanket of nitrogen in atmosphere controlled heat treatment furnace altogether, were cooled to 120 ℃, were incubated 5-8 hour, then cool to room temperature;
(6) the powder metallurgy synchronizing wheel after the melanism processing nitriding carries out melanism processing 3-5 minute, takes out then, gets final product.
Described powder metallurgy synchronizing wheel is characterized in that, the particle diameter of various metal dusts is in 200-400 order scope in the described raw material.
The preparation method of described powder metallurgy synchronizing wheel, it is characterized in that, described modification trees ashes powder is prepared from by the following method: with the trees ashes earlier with 25% salt acid soak 30-40 minute, neutralize with alkali lye then, use the deionized water rinsing impurity elimination again, mix again and with small amount of ethanol dissolved dilution NDZ-311 titanate coupling agent, the consumption of NDZ-311 titanate coupling agent is the 1-2% of trees ashes weight, add in the high speed mixer with Sprayable, discharging behind the stirring 15-20min, oven dry grinds to form 300-400 order powder, obtains modification trees ashes powder.
Advantage of the present invention and beneficial effect:
1. powder metallurgy synchronizing wheel of the present invention, adopt substep to mix, guaranteed the density uniformity of finished parts, improved the comprehensive mechanical performance of synchronizing wheel, add man-hour, in the operation of mixed-powder material, at first wetting to the part iron powder with coupling agent, and then alloyed powder and lubricant added in the wetting iron powder in proportion mix, adding wherein through remaining iron powder at last, fully mix, the mixed-powder of gained is repressed, sintering, heat treatment, surface treatment obtains final product at last, the powder metallurgy processing technology of employing, significantly reduce manufacturing cost, improved stock utilization and productivity ratio.
2. powder metallurgy synchronizing wheel of the present invention adds the metal dust of different proportion in composition of raw materials, make the synchronizing wheel of preparing reach high strength, the performance of high rigidity and high abrasion; In prescription, add an amount of kollag, increased the self-lubricating property of product; Add an amount of tungsten powder, modification trees ashes powder, improved intensity and anti-wear performance and the self-lubricating property of product.
The specific embodiment
Below by embodiment, the present invention is described in further detail, but the present invention not only is confined to following examples.
Embodiment takes by weighing following raw material (kg) iron powder 100, copper powder 1.9, molybdenum powder 0.6, tungsten powder 0.2, nickel powder 1.0, graphite powder 0.7, modification trees ashes 0.2, lithium stearate 0.5, zinc stearate 0.2, ethylene bis stearic acid amide 0.15, molybdenum bisuphide 0.2, alundum (Al 0.3, calcirm-fluoride 0.3, LiF 0.45
The preparation method may further comprise the steps:
(1) at first the base-material iron powder of 40-50% is packed in the high-speed mixer, to the silane coupler KH-560 that wherein adds base-material iron powder quality 0.3-0.6%, high-speed stirred 5-6 minute, then with copper powder, molybdenum powder, tungsten powder, nickel powder, graphite powder, modification trees ashes powder, zinc stearate, ethylene bis stearic acid amide and remaining iron powder add wherein successively, the heating of high-speed mixing limit, limit, when temperature is raised to 130-135 ℃, all the other components in will filling a prescription all add wherein, continue again to mix 8-10 minute, allow its cooling then, obtain the uniform iron base powder mixture of density end;
(2) pack in the mould in the iron base powder mixture end that step (1) is obtained, press forming under 550-580Mpa pressure;
(3) green compact of press forming are placed in the sintering furnace, in the protective atmosphere of hydrogen and nitrogen mixture body, it is 1115～1125 ℃ in temperature at first, sintering time is 10-20 minute, then with 5-8 ℃/minute speed rising temperature to 1250-1300 ℃, under this temperature, knot 10-15 minute reburns, room temperature is down in cooling then, is carrying out fine finishining;
(4) carry out Quenching Treatment after the heat treatment fine finishining again, hardening heat is 825～835 ℃, cool time 2-3 hour; Under 540-550 ℃, carry out high tempering then and handle, be incubated 1.5-2 hour; Carry out lonneal at 155～165 ℃ then, 2-3 hour;
(5) gas nitriding, the powder metallurgy synchronizing wheel after the lonneal were oozed 50 minutes under 700 ℃ of blanket of nitrogen in atmosphere controlled heat treatment furnace altogether, were cooled to 120 ℃, and insulation is during 5-8, then cool to room temperature;
(6) the powder metallurgy synchronizing wheel after the melanism processing nitriding carries out melanism processing 3-5 minute, takes out then, gets final product.
The particle diameter of various metal dusts is in 300-400 order scope in the raw material.
Modification trees ashes powder is prepared from by the following method: with the trees ashes earlier with 25% salt acid soak 30-40 minute, neutralize with alkali lye then, use the deionized water rinsing impurity elimination again, mix again and with small amount of ethanol dissolved dilution NDZ-311 titanate coupling agent, the consumption of NDZ-311 titanate coupling agent is the 1-2% of trees ashes weight, adds in the high speed mixer discharging behind the stirring 15-20min with Sprayable, oven dry grinds to form the 300-350 powder, obtains modification trees ashes powder.
The Performance Detection of the powder metallurgical gear that present embodiment makes is as follows:
Tensile strength sigma b (MPa): 810
Yield strength σ s (MPa): 548
Percentage elongation δ 5 (%): 13.6
Contraction percentage of area ψ (%): 38.
Claims (4)
1. powder metallurgy synchronizing wheel, it is characterized in that, suppressed forming by the powder stock of following weight portion: iron powder 100, copper powder 1.8-2.0, molybdenum powder 0.5-0.8, tungsten powder 0.1-0.3, nickel powder 0.8-1.2, graphite powder 0.5-0.8, modification trees ashes 0.1-0.3, lithium stearate 0.2-0.6, zinc stearate 0.1-0.3, ethylene bis stearic acid amide 0.1-0.2, molybdenum bisuphide 0.1-0.3, alundum (Al 0.2-0.4, calcirm-fluoride 0.2-0.4, LiF 0.4-0.5.
2. the preparation method of powder metallurgy synchronizing wheel as claimed in claim 1 is characterized in that, may further comprise the steps:
(1) at first the base-material iron powder of 40-50% is packed in the high-speed mixer, to the silane coupler KH-560 that wherein adds base-material iron powder quality 0.3-0.6%, high-speed stirred 5-6 minute, then with copper powder, molybdenum powder, tungsten powder, nickel powder, graphite powder, modification trees ashes powder, lithium stearate, zinc stearate, ethylene bis stearic acid amide and remaining iron powder add wherein successively, the heating of high-speed mixing limit, limit, when temperature is raised to 130-135 ℃, all the other components in will filling a prescription all add wherein, continue again to mix 8-10 minute, allow its cooling then, obtain the uniform iron base powder mixture of density end;
(2) pack in the mould in the iron base powder mixture end that step (1) is obtained, press forming under 550-580Mpa pressure;
(3) green compact of press forming are placed in the sintering furnace, in the protective atmosphere of hydrogen and nitrogen mixture body, it is 1115～1125 ℃ in temperature at first, sintering time is 10-20 minute, then with 10-20 ℃/minute speed rising temperature to 1250-1300 ℃, under this temperature, knot 10-15 minute reburns, room temperature is down in cooling then, is carrying out fine finishining;
(4) carry out Quenching Treatment after the heat treatment fine finishining again, hardening heat is 825～835 ℃, cool time 2-3 hour; Under 540-550 ℃, carry out high tempering then and handle, be incubated 1.5-2 hour; Carry out lonneal at 155～165 ℃ then, 2-3 hour;
(5) gas nitriding, the powder metallurgy synchronizing wheel after the lonneal were oozed 50 minutes under 700 ℃ of blanket of nitrogen in atmosphere controlled heat treatment furnace altogether, were cooled to 120 ℃, and insulation is during 5-8, then cool to room temperature;
(6) the powder metallurgy synchronizing wheel after the melanism processing nitriding carries out melanism processing 3-5 minute, takes out then, gets final product.
3. powder metallurgy synchronizing wheel according to claim 1 is characterized in that, the particle diameter of various metal dusts is in 200-400 order scope in the described raw material.
4. the preparation method of powder metallurgy synchronizing wheel according to claim 2, it is characterized in that, described modification trees ashes powder is prepared from by the following method: with the trees ashes earlier with 25% salt acid soak 30-40 minute, neutralize with alkali lye then, use the deionized water rinsing impurity elimination again, mix again and with small amount of ethanol dissolved dilution NDZ-311 titanate coupling agent, the consumption of NDZ-311 titanate coupling agent is the 1-2% of trees ashes weight, add in the high speed mixer with Sprayable, discharging behind the stirring 15-20min, oven dry grinds to form 300-400 order powder, obtains modification trees ashes powder.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602902A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgy pressure-resistant composite metal material and preparation method thereof |
| CN103602900A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Novel powder metallurgy flange and preparation method thereof |
| CN104028765A (en) * | 2014-06-27 | 2014-09-10 | 张家港振江粉末冶金制品有限公司 | Powder metallurgy component and production method of powder metallurgy component with through hole |
| CN104455321A (en) * | 2013-09-17 | 2015-03-25 | 湖北永土科技股份有限公司 | Automotive brake clearance automatic adjusting arm left and right rack |
| CN105149595A (en) * | 2015-08-28 | 2015-12-16 | 苏州莱特复合材料有限公司 | Powder metallurgy shaft sleeve and manufacturing method thereof |
| FR3039604A1 (en) * | 2015-07-28 | 2017-02-03 | Hoerbiger Antriebstechnik Hold | |
| CN109128190A (en) * | 2018-10-15 | 2019-01-04 | 常熟市迅达粉末冶金有限公司 | A kind of helical gear processing technology of thin-walled |
| CN111872371A (en) * | 2020-07-28 | 2020-11-03 | 青志(无锡)粉末铸锻有限公司 | Production process of clamping jaw for woodworking machine |
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| CN102179519A (en) * | 2011-03-09 | 2011-09-14 | 宁波甬台粉末冶金有限公司 | Powder metallurgy transmission gear and manufacturing method thereof |
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| CN102990065A (en) * | 2012-11-25 | 2013-03-27 | 安徽普源分离机械制造有限公司 | Powder metallurgy manufacturing method for valve flap of check valve |
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| CN102179519A (en) * | 2011-03-09 | 2011-09-14 | 宁波甬台粉末冶金有限公司 | Powder metallurgy transmission gear and manufacturing method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455321A (en) * | 2013-09-17 | 2015-03-25 | 湖北永土科技股份有限公司 | Automotive brake clearance automatic adjusting arm left and right rack |
| CN103602902B (en) * | 2013-10-10 | 2016-03-09 | 铜陵新创流体科技有限公司 | A kind of Powder metallurgy pressure-resistant composite metal material and preparation method thereof |
| CN103602900A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Novel powder metallurgy flange and preparation method thereof |
| CN103602902A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgy pressure-resistant composite metal material and preparation method thereof |
| CN103602900B (en) * | 2013-10-10 | 2016-03-09 | 铜陵新创流体科技有限公司 | A kind of Powder metallurgy flange and preparation method thereof |
| CN104028765A (en) * | 2014-06-27 | 2014-09-10 | 张家港振江粉末冶金制品有限公司 | Powder metallurgy component and production method of powder metallurgy component with through hole |
| CN104028765B (en) * | 2014-06-27 | 2016-01-20 | 张家港振江粉末冶金制品有限公司 | A kind of production method of the metallic sintered products with installation through hole |
| FR3039604A1 (en) * | 2015-07-28 | 2017-02-03 | Hoerbiger Antriebstechnik Hold | |
| CN106392078A (en) * | 2015-07-28 | 2017-02-15 | 贺尔碧格传动技术控股有限公司 | Method for producing a synchronizing ring and the synchronizing ring |
| CN105149595A (en) * | 2015-08-28 | 2015-12-16 | 苏州莱特复合材料有限公司 | Powder metallurgy shaft sleeve and manufacturing method thereof |
| CN109128190A (en) * | 2018-10-15 | 2019-01-04 | 常熟市迅达粉末冶金有限公司 | A kind of helical gear processing technology of thin-walled |
| CN111872371A (en) * | 2020-07-28 | 2020-11-03 | 青志(无锡)粉末铸锻有限公司 | Production process of clamping jaw for woodworking machine |
| CN111872371B (en) * | 2020-07-28 | 2022-02-18 | 青志(无锡)粉末铸锻有限公司 | Production process of clamping jaw for woodworking machine |
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Address after: The new town 241000 Anhui city of Wuhu province Fanchang County of Curry Village Patentee after: Anhui Hengjun Powder Metallurgy Technology Co., Ltd. Address before: The new town 241202 Anhui city of Wuhu province Fanchang County of Curry Village Patentee before: Anhui Hengyu Powder Metallurgy Co., Ltd. |
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