CN102022466B - Fiber-type dual metal powder metallurgy brake block - Google Patents
Fiber-type dual metal powder metallurgy brake block Download PDFInfo
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- CN102022466B CN102022466B CN2009101908836A CN200910190883A CN102022466B CN 102022466 B CN102022466 B CN 102022466B CN 2009101908836 A CN2009101908836 A CN 2009101908836A CN 200910190883 A CN200910190883 A CN 200910190883A CN 102022466 B CN102022466 B CN 102022466B
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Abstract
The invention relates to a fiber-type dual metal powder metallurgy brake block, which comprises a cambered steel backing, a bolt buckle which is positioned and connected on the cambered steel backing, and bolt buckle grooves symmetrically connected to the left part and the right part on the cambered steel backing respectively. The brake block is characterized in that: three friction bodies are respectively integrated with three back plates by pressure sintering; and the outer curvature radius of the three back plates is equal to the inner curvature radius of the cambered steel backing, and the back plates are fixedly connected with the cambered steel backing. The fiber-type dual metal powder metallurgy brake block enhances the intensity of a block body, enhances friction coefficient stationarity, thermal stability and friction coefficients, and guarantees the braking distance and the braking safety and stability of a train in a sudden accident during operation. During use, the friction bodies cannot produce residues due to the addition of fiber powder, so jangle in the braking process is avoided.
Description
Technical field
The present invention relates to the parts in the locomotive braking system, be specifically related to the metallurgical brake shoe of a kind of fibrous type thermometal-powder, is to be used for electric locomotive, diesel locomotive and rail motor set to enter the station or meet the critical component that emergency braking is taked in accident.
Background technique
Along with the repeatedly speed-raising of train, traditional cast iron brake shoe has satisfied not the requirement of braking ability, and the resin brake shoe that originally adopts because (more than 300 ℃) friction factor thermostability receives certain influence under high temperature condition, is restricted in the use.At present, the brake shoe that uses on the high speed machine motor-car group adopts special powder metallurgy process manufacturing, and friction piece and backboard are welded with the arc steel backing through pressure sintering again.The producer that has is researching and developing powder metallurgy brake block on probation, but all also has deficiency in use, emits a shrill cry, falls when using phenomenon such as limit arrisdefect during like the thermostability of friction factor, braking and exist.
Summary of the invention
To present speed increase in vehicle; Requirement to friction coefficient of brake shoe, mechanical property; The objective of the invention is: under the situation that does not change locomotive brake shoe thrust; Provide a kind of fibrous type thermometal-powder metallurgical brake shoe, satisfy the requirement of present railway transport industry, produce when overcoming braking scream, to antithesis scratch, wear extent is big, fall defective such as slag.
The metallurgical brake shoe of fibrous type thermometal-powder of the present invention; Comprise the arc steel backing, be located by connecting on bolt buckle above the arc steel backing, be connected to above the arc steel backing symmetrically about the bolt buckle groove of portion, it is characterized in that: three friction pieces are one with three backboards through pressure sintering respectively; The outer curvature radius of three backboards equates with the incurvature radius of arc steel backing, and is fixedly connected with the arc steel backing.
The metallurgical brake shoe of described fibrous type thermometal-powder, the weight percentage of the constituent element composition of its friction piece is following:
Mix iron powder: 58-72%, ferrochrome powder: 3-6%, silicon carbide: 2-3%, molybdenum-iron powder: 0.5-1.5%; Mullite: 0.5-1%, zircon sand: 1-3%, ferronickel powder: 1-3%; Mix copper powder: 3-6%, tin alloy powder: 1-3% mixes lead powder: 3-6%; Molybdenum disulfide: 1-2% mixes carbon dust: 9-15%, blend fiber powder: 0.5-2%.
The metallurgical brake shoe of described fibrous type thermometal-powder, the mixing iron powder in the constituent element composition of its friction piece is reduction Fe powder+atomizing Fe powder, and wherein atomized iron powder accounts for 85～90%, and surplus is a reducing iron powder.Atomized iron powder is to refer to the powder that adopts hydraulic atomized/aerosolization to make, and this powder apparent density is bigger than reducing iron powder, and forming is good.
The metallurgical brake shoe of described fibrous type thermometal-powder, the mixing copper powder in the constituent element composition of its friction piece is pure copper powder+copper-clad iron powder, both ratios respectively account for half the; Described copper-clad iron powder is a kind of on-100 order iron powders, evenly coats layer of copper with chemical method; Can avoid copper powder in use to produce deviation with this powder.
The metallurgical brake shoe of described fibrous type thermometal-powder, the mixing lead powder in the constituent element composition of its friction piece are the lead powder of pure lead powder+after peroxidating, and both ratios respectively account for half the.
The metallurgical brake shoe of described fibrous type thermometal-powder, the mixing carbon dust in the constituent element composition of its friction piece is plumbago+coke powder, and wherein plumbago accounts for 60%, and surplus is a coke powder.
The metallurgical brake shoe of described fibrous type thermometal-powder, the blend fiber powder in the constituent element composition of its friction piece is iron fiber powder+glass fiber powder, and wherein the iron fiber powder accounts for 90%, and surplus is a glass fiber powder; Described iron fiber powder, the diameter of powder are 0.1～0.08mm, and length is 0.2～0.5mm.
Chromium content 58-61% in the ferrochrome powder; Molybdenum content in the molybdenum-iron powder is more than 58%, nickel content 1.5%-2.0% in the ferronickel powder.NBA one refers to a kind of powder that iron mixes with the iron-nickel alloy powder, and it is according to customer requirements, in smelting process, directly adds nickel, a kind of alloyed powder that atomizing is at last come out, and general this powder nickel content about 20～40% adds in batching as required.The tin zinc powder that the tin alloy powder is meant, tin accounts for 85-90%.
To mix iron powder-base material and said other constituent element, to carry out heat sticking; After the powerful mixing, be pressed into green compact, carry out sintering with backboard at the pressured type high temperature sintering furnace through mould; Sintering process is: calcined temperature in two stages: the phase I: initial temperature is 430-450 ℃, and pressure is 7-8Kg/cm
2, holding time 1.5h.Second stage: be warmed up to 680-700 ℃; Pressure is 7-8Kg/cm
2, holding time 1h, and then adjust to 1000-1030 ℃ to temperature and carry out high temperature sintering, sintering time 3-3.5h, pressure are 9-10Kg/cm
2Cool to 700 ℃ at last with the furnace, hang out body of heater, air cooling to 300 ℃ goes inner cover to water again, is cooled to 100 ℃, stops the supple of gas or steam to be cooled to 40 ℃ and to come out of the stove.Whole process is carried out in protective atmosphere.
Then, the cambered surface of machining backboard, last, be welded on the arc steel backing.
Beneficial effect of the present invention: both strengthened a watt body intensity, and improved stationarity, thermostability and the friction factor of friction factor again, and guaranteed that the be in operation stopping distance and the brake safe of meeting accident of train was steady.Friction piece in use can not produce slag owing to added the fiber powder, has overcome the cacophony in the braking process.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the plan view of Fig. 1.
Fig. 3 is the A-A sectional view of Fig. 1.
Fig. 4 is the B-B sectional view of Fig. 1.
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the metallurgical brake shoe of fibrous type thermometal-powder of the present invention, comprise arc steel backing 1, be located by connecting on bolt buckle 2 above the arc steel backing, be connected to above the arc steel backing symmetrically about the bolt buckle groove 3 of portion; Three friction pieces 5 are one with three backboards 4 through pressure sintering respectively; The outer curvature radius of three backboards 4 equates with the incurvature radius of arc steel backing, and is fixedly connected with arc steel backing 1.
The weight percentage of the constituent element composition of the friction piece 5 of the metallurgical brake shoe of described fibrous type thermometal-powder is following:
Mix iron powder: 58-72%, ferrochrome powder: 3-6%, silicon carbide: 2-3%, molybdenum-iron powder: 0.5-1.5%; Mullite: 0.5-1%, zircon sand: 1-3%, ferronickel powder: 1-3%; Mix copper powder: 3-6%, tin alloy powder: 1-3% mixes lead powder: 3-6%; Molybdenum disulfide: 1-2% mixes carbon dust: 9-15%, blend fiber powder: 0.5-2%.
Mixing iron powder in the constituent element composition of described friction piece 5 is reduction Fe powder+atomizing Fe powder, and wherein atomized iron powder accounts for 85～90%, and surplus is a reducing iron powder.Atomized iron powder is to refer to the powder that adopts hydraulic atomized/aerosolization to make, and this powder apparent density is bigger than reducing iron powder, and forming is good.
Mixing copper powder in the constituent element composition of described friction piece 5 is pure copper powder+copper-clad iron powder, and both ratios respectively account for half the; Described copper-clad iron powder is a kind of on-100 order iron powders, evenly coats layer of copper with chemical method; Can avoid copper powder in use to produce deviation with this powder.
Mixing lead powder in the constituent element composition of described friction piece 5 is the lead powder of pure lead powder+after peroxidating, and both ratios respectively account for half the.
Mixing carbon dust in the constituent element composition of described friction piece 5 is plumbago+coke powder, and wherein plumbago accounts for 60%, and surplus is a coke powder.
The metallurgical brake shoe of described fibrous type thermometal-powder, it is characterized in that: the blend fiber powder in the constituent element composition of described friction piece 5 is iron fiber powder+glass fiber powder, and wherein the iron fiber powder accounts for 90%, surplus is a glass fiber powder; Described iron fiber powder, the diameter of powder are 0.1～0.08mm, and length is 0.2～0.5mm.
Embodiment one: the weight percentage of the constituent element composition of the friction piece 5 of the metallurgical brake shoe of fibrous type thermometal-powder is:
Mix iron powder 65%, ferrochrome powder 4.5%, silicon carbide 2.5%, molybdenum-iron powder 1.0%, mullite 0.75%; Zircon sand 1.5%, ferronickel powder 1.5% mixes copper powder 4.5%, tin alloy powder 2%; Mix lead powder 4.5%, molybdenum disulfide 1.5% mixes carbon dust 12%, blend fiber powder: 1.25%; After will mixing iron powder-base material and said other constituent element powerful mixing, be pressed into green compact, carry out sintering with backboard at the pressured type high temperature sintering furnace, calcined temperature in two stages: the phase I: initial temperature is 430-450 ℃, and pressure is 7-8Kg/cm
2, holding time 1.5h.Second stage: be warmed up to 680-700 ℃; Pressure is 7-8Kg/cm
2, holding time 1h, and then adjust to 1000-1030 ℃ to temperature and carry out high temperature sintering, sintering time 3-3.5h, pressure are 9-10Kg/cm
2Cool to 700 ℃ at last with the furnace, hang out body of heater, air cooling to 300 ℃ goes inner cover to water again, is cooled to 100 ℃, stops the supple of gas or steam to be cooled to 40 ℃ and to come out of the stove.Whole process is carried out in protective atmosphere.
Then, the cambered surface of machining backboard, last, be welded on the arc steel backing.
The friction piece of brake shoe has adopted above-mentioned preferred prescription to be equipped with various friction constituent elements (silicon carbide, ferrochrome powder, zircon sand, mullite, copper iron powder, iron nickel powder), lubricant component (graphite, coke, lead, lead oxide, molybdenum disulfide), has strengthened constituent element (iron fiber, glass dimension); The wear resistance and the working life of brake shoe/sheet have been improved; Mechanical property reaches People's Republic of China's railroad industry standard (TB/T3005-2008) comprehensively, and concrete outcome sees the following form:
| Project name | Technical requirements | Testing result | Unit |
| Density | - | 5.51 | g/cm 3 |
| Hardness | ≤100 | 98 | MB |
| Cross-breaking strength | ≥30 | 132 | MPa |
| Compressive strength | ≥90 | 209 | MPa |
| Draw and cut intensity | ≥30 | 63 | MPa |
| Impact toughness | ≥5 | 7 | KJ/m 3 |
Make 1: 1 exemplar on platform experiment by above-mentioned prescription, adopt under 43KN and two kinds of thrust of 21.5KN, the drag friction coefficient all meets the TB/T3005-2008 standard under the friction speed environment, and stopping distance is lower than standard, and whole testing result sees the following form.
The metallurgical brake shoe product inspection report of fibrous type thermometal-powder
Embodiment two: the weight percentage of the constituent element composition of the friction piece 5 of the metallurgical brake shoe of fibrous type thermometal-powder is:
Mix iron powder 72%, ferrochrome powder 6%, silicon carbide 3%, molybdenum-iron powder 1.5%, mullite 1%, zircon sand 3%, ferronickel powder 3% mixes copper powder 6%, and tin alloy powder 3% mixes lead powder 6%, and molybdenum disulfide 2% mixes carbon dust 15%, blend fiber powder 2%; After will mixing iron powder-base material and said other constituent element powerful mixing, be pressed into green compact, carry out sintering with backboard at the pressured type high temperature sintering furnace, calcined temperature in two stages: the phase I: initial temperature is 430-450 ℃, and pressure is 7-8Kg/cm
2, holding time 1.5h.Second stage: be warmed up to 680-700 ℃; Pressure is 7-8Kg/cm
2, holding time 1h, and then adjust to 1000-1030 ℃ to temperature and carry out high temperature sintering, sintering time 3-3.5h, pressure are 9-10Kg/cm
2Cool to 700 ℃ at last with the furnace, hang out body of heater, air cooling to 300 ℃ goes inner cover to water again, is cooled to 100 ℃, stops the supple of gas or steam to be cooled to 40 ℃ and to come out of the stove.Whole process is carried out in protective atmosphere.
Then, the cambered surface of machining backboard, last, be welded on the arc steel backing.
Embodiment three: the weight percentage of the constituent element composition of the friction piece 5 of the metallurgical brake shoe of fibrous type thermometal-powder is:
Mix iron powder 58%, ferrochrome powder 3%, silicon carbide 2%, molybdenum-iron powder 0.5%, mullite 0.5%, zircon sand 1%, ferronickel powder 1% mixes copper powder 3%, and tin alloy powder 1% mixes lead powder 3%, and molybdenum disulfide 1% mixes carbon dust 9%, blend fiber powder 0.5%; After will mixing iron powder-base material and said other constituent element powerful mixing, be pressed into green compact, carry out sintering with backboard at the pressured type high temperature sintering furnace through mould, calcined temperature in two stages: the phase I: initial temperature is 430-450 ℃, and pressure is 7-8Kg/cm
2, holding time 1.5h.Second stage: be warmed up to 680-700 ℃; Pressure is 7-8Kg/cm
2, holding time 1h, and then adjust to 1000-1030 ℃ to temperature and carry out high temperature sintering, sintering time 3-3.5h, pressure are 9-10Kg/cm
2Cool to 700 ℃ at last with the furnace, hang out body of heater, air cooling to 300 ℃ goes inner cover to water again, is cooled to 100 ℃, stops the supple of gas or steam to be cooled to 40 ℃ and to come out of the stove.Whole process is carried out in protective atmosphere.
Then, the cambered surface of machining backboard, last, be welded on the arc steel backing.
Claims (6)
1. the metallurgical brake shoe of fibrous type thermometal-powder; Comprise arc steel backing (1), be located by connecting on bolt buckle (2) above the arc steel backing, be connected to above the arc steel backing symmetrically about the bolt buckle groove (3) of portion, it is characterized in that: three friction pieces (5) are one with three backboards (4) through pressure sintering respectively; The outer curvature radius of three backboards (4) equates with the incurvature radius of arc steel backing, and is fixedly connected with arc steel backing (1);
The weight percentage of the constituent element composition of described friction piece (5) is following:
Mix iron powder: 58-72%, ferrochrome powder: 3-6%, silicon carbide: 2-3%, molybdenum-iron powder: 0.5-1.5%; Mullite: 0.5-1%, zircon sand: 1-3%, ferronickel powder: 1-3%; Mix copper powder: 3-6%, tin alloy powder: 1-3% mixes lead powder: 3-6%; Molybdenum disulfide: 1-2% mixes carbon dust: 9-15%, blend fiber powder: 0.5-2%.
2. the metallurgical brake shoe of fibrous type thermometal-powder as claimed in claim 1, it is characterized in that: the mixing iron powder in the constituent element composition of described friction piece (5) is reducing iron powder+atomized iron powder, and wherein atomized iron powder accounts for 85～90%, surplus is a reducing iron powder.
3. the metallurgical brake shoe of fibrous type thermometal-powder as claimed in claim 1, it is characterized in that: the mixing copper powder in the constituent element composition of described friction piece (5) is pure copper powder+copper-clad iron powder, both ratios respectively account for half the.
4. the metallurgical brake shoe of fibrous type thermometal-powder as claimed in claim 1 is characterized in that: the mixing lead powder in the constituent element composition of described friction piece (5) is the lead powder of pure lead powder+after peroxidating, and both ratios respectively account for half the.
5. the metallurgical brake shoe of fibrous type thermometal-powder as claimed in claim 1, it is characterized in that: the mixing carbon dust in the constituent element composition of described friction piece (5) is plumbago+coke powder, and wherein plumbago accounts for 60%, surplus is a coke powder.
6. the metallurgical brake shoe of fibrous type thermometal-powder as claimed in claim 1, it is characterized in that: the blend fiber powder in the constituent element composition of described friction piece (5) is iron fiber powder+glass fiber powder, and wherein the iron fiber powder accounts for 90%, surplus is a glass fiber powder; Described iron fiber powder, the diameter of powder are 0.08～0.1 ㎜, and length is 0.2～0.5 ㎜.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101908836A CN102022466B (en) | 2009-09-16 | 2009-09-16 | Fiber-type dual metal powder metallurgy brake block |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101908836A CN102022466B (en) | 2009-09-16 | 2009-09-16 | Fiber-type dual metal powder metallurgy brake block |
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| CN102022466A CN102022466A (en) | 2011-04-20 |
| CN102022466B true CN102022466B (en) | 2012-08-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103540868A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy clutch friction piece and preparation method thereof |
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| CN106111978B (en) * | 2016-08-18 | 2018-09-25 | 贵州新安航空机械有限责任公司 | A kind of ultralow brake shoe and the preparation method of rubbing of railway freight-car powder metallurgy |
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| CN107855516A (en) * | 2017-10-20 | 2018-03-30 | 广西银英生物质能源科技开发股份有限公司 | A kind of copper based powder metallurgy material and preparation method thereof |
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| CN111992706B (en) * | 2020-08-26 | 2021-12-24 | 昆明理工大学 | Cross-scale self-lubricating particle reinforced steel-based composite material and preparation method thereof |
| CN113565907B (en) * | 2021-07-23 | 2022-12-09 | 北京浦然轨道交通科技股份有限公司 | Brake pad for motor car, friction material for brake pad and preparation method of friction material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1096168A2 (en) * | 1999-10-25 | 2001-05-02 | Westinghouse Air Brake Company | Brake shoe with friction management |
| CN2929325Y (en) * | 2006-06-02 | 2007-08-01 | 荆州九驰高能材料有限公司 | Powder metallurgical brake shoe |
| CN101162033A (en) * | 2006-10-13 | 2008-04-16 | 贵州新安航空机械有限责任公司 | Freight car compartment powder metallurgy brake block |
| CN101445641A (en) * | 2008-12-30 | 2009-06-03 | 本钢板材股份有限公司 | Wear-resistant material used on locomotive brake shoe |
-
2009
- 2009-09-16 CN CN2009101908836A patent/CN102022466B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1096168A2 (en) * | 1999-10-25 | 2001-05-02 | Westinghouse Air Brake Company | Brake shoe with friction management |
| CN2929325Y (en) * | 2006-06-02 | 2007-08-01 | 荆州九驰高能材料有限公司 | Powder metallurgical brake shoe |
| CN101162033A (en) * | 2006-10-13 | 2008-04-16 | 贵州新安航空机械有限责任公司 | Freight car compartment powder metallurgy brake block |
| CN101445641A (en) * | 2008-12-30 | 2009-06-03 | 本钢板材股份有限公司 | Wear-resistant material used on locomotive brake shoe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103540868A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy clutch friction piece and preparation method thereof |
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