CN101906592A - High-wear resistant low-cobalt powder metallurgical valve seat - Google Patents
High-wear resistant low-cobalt powder metallurgical valve seat Download PDFInfo
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- CN101906592A CN101906592A CN2010102463851A CN201010246385A CN101906592A CN 101906592 A CN101906592 A CN 101906592A CN 2010102463851 A CN2010102463851 A CN 2010102463851A CN 201010246385 A CN201010246385 A CN 201010246385A CN 101906592 A CN101906592 A CN 101906592A
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Abstract
The invention discloses a high-wear resistant low-cobalt powder metallurgical valve seat. The valve seat comprises the following chemical components in percentage by weight: 0.8 to 1.2 percent of C, 1.0 to 3.0 percent of Cr, 2.0 to 4.0 percent of Mo, 0.5 to 1.2 percent of Ni, 0.2 to 0.5 percent of Co, 12 to 30 percent of Cu and the balance of Fe. High-pressure water atomization powder preparation technology is improved, a certain amount of Cr and Mo alloy power are added reasonably, and mechanical mixing, pressing and sintering are performed. Due to the adoption of a copper infiltration process, the physical properties and mechanical properties of the valve seat such as thermal conductivity, heat intensity, wear resistance and the like are improved remarkably.
Description
Technical field
The invention belongs to metallurgical technology field, particularly a kind of high-wear resistant low-cobalt powder metallurgical valve seat.
Background technology
Valve seating is the vitals of motor car engine, the important sealing friction that partners of it and valve is paid, during engine operation, valve retainer is subjected to valve and impacts, and the wearing and tearing of dust also are subjected to hot cold stress alternating action in addition in the washing away of high temperature (530～810 ℃) combustion gases, burn into and products of combustion, the air, it very easily produces distortion, scaling loss, even fracture, therefore require not only that Materials for Valve Seat is wear-resisting, corrosion-resistant, high temperature resistance, also require certain warp-wise crushing strength.
In view of above situation, domestic and international many producers all adopt the high cobalt alloy material, and its cobalt contents is generally 5～10%, and the cobalt metal is a rare metal, cost an arm and a leg, and also be material for preparedness against war, but because price is too expensive, so do not used widely.
Summary of the invention
Technical problem solved by the invention is to provide a kind of high-wear resistant low-cobalt powder metallurgical valve seat.
The technical solution that realizes the object of the invention is: a kind of high-wear resistant low-cobalt powder metallurgical valve seat, and chemical ingredients and content thereof are: C:0.8-1.2%, Cr:10-30%, Mo:2.0-4.0%, Ni:0.5-1.2%, Co:0.2-0.5%, Cu:12-30%, surplus is Fe.
The present invention compared with prior art, its remarkable advantage is: 1) the present invention's two kinds of powdered alloys of Cr, Mo by improving hydraulic atomized powder-making technique and rationally adding certain content, by mechanically mixing, compacting, sintering.Again because the employing of copper leaching technology, make the physical properties such as thermal conductivity, hot strength and wear resistance of valve seating and being significantly improved of mechanical property.2) the valve seating base has formed the weave construction of inlaying hard point on soft relatively matrix through agglomerating, improves wear resistance, the high-temperature stability of valve seating significantly.Through supporting use of complete system plant and bench testing in 333 hours, use white gasoline to be fuel, its density reaches 7.8g/cm
3, hardness reaches HRB108-111; Metallographic structure is that Cr, Mo are martensite, bainite, sorbite and the alloy carbide that is evenly distributed on matrix.The microhardness HV800-1100 of alloy carbide, powder metallurgy valve seats such as the MR479QA of employing low cobalt alloy material development and JL376QE, promptly wear-resisting, heat-resisting shock-resistant again, not only widely apply underloading and in carry the white gasoline motor car engine, and can be increasingly extensive in the engine of car (automobile) high power density.3) valve seating of the present invention is to use the low cobalt alloy material, satisfies the valve seating bad working environments, reduces production costs.This mmaterial is compared with other materials has special competitive power.
Embodiment
A kind of high-wear resistant low-cobalt powder metallurgical valve seat of the present invention, chemical ingredients and content thereof are: C:0.8-1.2%, Cr:1.0-3.0%, Mo:2.0-4.0%, Ni:0.5-1.2%, Co:0.2-0.5%, Cu:12-30%, surplus is Fe.
Wherein preferred content is: C:1-1.2%, and Cr:20-3.0%, Mo:3.0-4.0%, Ni:1-1.2%, Co:0.3-0.5%, Cu:12-20%, surplus is Fe.
High-wear resistant low-cobalt powder metallurgical valve seat of the present invention, the low-alloy powder that at first base iron is adopted water atomization make when making is allocated a certain amount of two kinds (Cr, Mo) high alloy powder afterwards into; After the compacting sintered blank placed to push away and defend the formula sintering oven, in ammonia dissolving atmosphere, temperature is carried out sintering at 1100～1150 ℃.Valve seating sintered blank hardness is greater than HB108, its metallographic structure (martensite+bainite+sorbite+alloy carbide), density 〉=7.8g/cm
3Can obtain behind the sintering on the powerful alloy substrate, equally distributed hard phase greatly improves wear resistance, thermotolerance, erosion resistance and the warp-wise crushing strength of product.
Key of the present invention is: the basic powder of 1) selecting for use, it must possess necessarily wear-resisting, heat-resisting, corrosion-resistant, and the low alloy material of higher-strength is arranged.2) select the high alloy material that can form the hard phase for use, it must possess than high abrasion, heat-resisting, corrosion resistance nature, requires it and basic powder that affinity and fused interface are preferably arranged simultaneously, pass through sintering, can combine securely, when valve seating was subjected to impacting, hard can not come off again mutually.
Below in conjunction with embodiment the present invention is done further detailed description:
Embodiment 1:
Basic powder adopts low-alloy powder+two kind of (Cr, Mo) high alloy powder+1.2% graphite+0.8% Zinic stearas of water atomization preparation to mix 40 minutes, after neutralizing, defends the formula sintering oven with pushing away, ammonia dissolving atmosphere, 1120 ℃ of temperature, sintering 40 minutes detects sintering briquette hardness HRB108～110; Metallographic structure: martensite+bainite+sorbite+alloy carbide; Radial crushing strength: 840N/mm
2Density 7.8g/cm
3Chemical Composition C:0.91, Cr:1.28, Mo:2.68, Ni:0.48, Co:0.24, Cu:1396, all the other Fe.
According to hypervelocity long duration test standard, valve seating product full speed full load (specified speed 6000r/min on test-bed with above-mentioned development, rated output 69KW, peak torque 128N.m), accumulative total is moved 333 hours, and (wherein break-in is 22 hours 20 minutes, external characteristics test 1 hour 40 minutes, strenuous test 309 hours).Through the folding machine testing, the valve seating size all in tolerance zone, is not seen wearing and tearing, and valve does not sink, and service condition is good.
Test used petrol engine rotational speed height, moment of torsion is big, and the power of bouncing during air valve drop is big, and exhaust temperature is higher, is 850 ± 10 ℃, and working conditions is quite abominable.Valve seating with other different materials of identical conditions test is being tested to 50-60 hour, and valve seating all has sinking in various degree.Above-mentioned test-results shows that valve seating of the present invention has excellent heat-resisting, wear-resisting, impact resistance, is particularly suitable for the Working environment of the motor car engine of exhaust temperature height, use white gasoline.
Embodiment 2:
High-wear resistant low-cobalt powder metallurgical valve seat, chemical ingredients and content thereof are: C:0.8%, Cr:1.0%, Mo:2.0%, Ni:0.5%, Co:02%, Cu:12%, surplus is Fe.
Manufacture method is with embodiment 1, and valve seating does not sink after the hypervelocity long duration test.
Embodiment 3:
High-wear resistant low-cobalt powder metallurgical valve seat, chemical ingredients and content thereof are: C:1.2%, Cr:3.0%, Mo:4.0%, Ni:1.2%, Co:0.5%, Cu:30%, surplus is Fe.
Manufacture method is with embodiment 1, and valve seating does not sink after the hypervelocity long duration test.
Embodiment 4:
High-wear resistant low-cobalt powder metallurgical valve seat, chemical ingredients and content thereof are: C:10%, Cr; 2.5%, Mo:3.5%, Ni:1.0%, Co:0.3%, Cu:20%, surplus is Fe.
Manufacture method is with embodiment 1, and valve seating does not sink after the hypervelocity long duration test.
Claims (3)
1. a high-wear resistant low-cobalt powder metallurgical valve seat is characterized in that, chemical ingredients and content thereof are: C:0.8-1.2%, and Cr:1.0-3.0%, Mo:2.0-4.0%, Ni:0.5-1.2%, Co:0.2-0.5%, Cu:12-30%, surplus is Fe.
2. high-wear resistant low-cobalt powder metallurgical valve seat according to claim 1 is characterized in that chemical ingredients and content thereof are: C:1-1.2%, Cr:2.0-3.0%, Mo:3.0-4.0%, Ni:1.0-1.2%, Co:0.3-0.5%, Cu:12-20%, surplus is Fe.
3. high-wear resistant low-cobalt powder metallurgical valve seat according to claim 1 is characterized in that chemical ingredients and content thereof are: C:1-1.2%, Cr:2.5-3.0%, Mo:3.5-4.0%, Ni:1.0-1.2%, Co:0.3-0.5%, Cu:12-14%, surplus is Fe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010246385 CN101906592B (en) | 2010-08-05 | 2010-08-05 | High-wear resistant low-cobalt powder metallurgical valve seat |
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| CN 201010246385 CN101906592B (en) | 2010-08-05 | 2010-08-05 | High-wear resistant low-cobalt powder metallurgical valve seat |
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| CN101906592A true CN101906592A (en) | 2010-12-08 |
| CN101906592B CN101906592B (en) | 2013-03-27 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014544A (en) * | 2012-12-03 | 2013-04-03 | 仪征市昌达粉末冶金制品有限公司 | Highly-wear-resistant powder metallurgy valve seat |
| CN103357863A (en) * | 2013-06-21 | 2013-10-23 | 马鞍山市恒毅机械制造有限公司 | High abrasion resistant metallurgy valve seat and preparation method thereof |
| CN104279019A (en) * | 2013-07-05 | 2015-01-14 | 株式会社理研 | Valve seat and manufacturing method thereof |
| CN104399966A (en) * | 2014-10-27 | 2015-03-11 | 奚杰 | Powder metallurgy valve seat containing nano Fe |
| CN105586535A (en) * | 2015-12-28 | 2016-05-18 | 仪征市昌达粉末冶金制品有限公司 | Non-cobalt alloy material powder metallurgy valve seat and preparation method and application thereof |
| CN106637093A (en) * | 2016-10-26 | 2017-05-10 | 奚杰 | Multielement multilayer nano-film powder metallurgy valve seat and preparation method thereof |
| CN108868941A (en) * | 2018-06-27 | 2018-11-23 | 浙江吉利控股集团有限公司 | Alcohol engine valve retainer and its manufacturing method, alcohol engine, automobile |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225758A (en) * | 2007-01-18 | 2008-07-23 | 上海广凌气门座厂 | Spiracula seat of car engine as well as manufacturing technology thereof |
| CN101634238A (en) * | 2009-08-31 | 2010-01-27 | 桐城市汽车部件有限公司 | Temperature-pressure-die wall lubrication valve seat containing rare earth powder metallurgy and manufacturing method thereof |
-
2010
- 2010-08-05 CN CN 201010246385 patent/CN101906592B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225758A (en) * | 2007-01-18 | 2008-07-23 | 上海广凌气门座厂 | Spiracula seat of car engine as well as manufacturing technology thereof |
| CN101634238A (en) * | 2009-08-31 | 2010-01-27 | 桐城市汽车部件有限公司 | Temperature-pressure-die wall lubrication valve seat containing rare earth powder metallurgy and manufacturing method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014544A (en) * | 2012-12-03 | 2013-04-03 | 仪征市昌达粉末冶金制品有限公司 | Highly-wear-resistant powder metallurgy valve seat |
| CN103357863A (en) * | 2013-06-21 | 2013-10-23 | 马鞍山市恒毅机械制造有限公司 | High abrasion resistant metallurgy valve seat and preparation method thereof |
| CN104279019A (en) * | 2013-07-05 | 2015-01-14 | 株式会社理研 | Valve seat and manufacturing method thereof |
| CN104279019B (en) * | 2013-07-05 | 2017-04-12 | 株式会社理研 | valve seat and manufacturing method thereof |
| CN104399966A (en) * | 2014-10-27 | 2015-03-11 | 奚杰 | Powder metallurgy valve seat containing nano Fe |
| CN105586535A (en) * | 2015-12-28 | 2016-05-18 | 仪征市昌达粉末冶金制品有限公司 | Non-cobalt alloy material powder metallurgy valve seat and preparation method and application thereof |
| CN105586535B (en) * | 2015-12-28 | 2017-12-08 | 仪征市昌达粉末冶金制品有限公司 | Without cobalt-alloy material powder metallurgy valve seat and its preparation method and application |
| CN106637093A (en) * | 2016-10-26 | 2017-05-10 | 奚杰 | Multielement multilayer nano-film powder metallurgy valve seat and preparation method thereof |
| CN108868941A (en) * | 2018-06-27 | 2018-11-23 | 浙江吉利控股集团有限公司 | Alcohol engine valve retainer and its manufacturing method, alcohol engine, automobile |
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| Publication number | Publication date |
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| CN101906592B (en) | 2013-03-27 |
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Owner name: YIZHENG CHANGDA POWDER METALLURGY PRODUCTS CO., LT Free format text: FORMER OWNER: YIZHENG BAOTAI ALLOY CO., LTD. Effective date: 20130520 |
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Effective date of registration: 20130520 Address after: 211400 Ma Town, Yizheng, Jiangsu Patentee after: Yizheng Changda Powder Metallurgy Product Co., Ltd. Address before: 211400, Jiangsu City, Yizheng Province Kim Town Industrial Park Jin Bao alloy company Patentee before: Yizheng Baotai Alloy Co., Ltd. |