CN103290305A - Piston insert ring resistant to low temperature impact and preparation method thereof - Google Patents
Piston insert ring resistant to low temperature impact and preparation method thereof Download PDFInfo
- Publication number
- CN103290305A CN103290305A CN2013101759804A CN201310175980A CN103290305A CN 103290305 A CN103290305 A CN 103290305A CN 2013101759804 A CN2013101759804 A CN 2013101759804A CN 201310175980 A CN201310175980 A CN 201310175980A CN 103290305 A CN103290305 A CN 103290305A
- Authority
- CN
- China
- Prior art keywords
- temperature impact
- piston
- aluminium
- hollow profile
- graphite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses a piston insert ring resistant to low temperature impact. The piston insert ring resistant to low temperature impact is composed of the following component in percentage by mass: 2.0-2.4% of C, 1.4-1.8% of Si, 0.8-1.0% of Mn, 13.0-15.0% of Ni, 5.5-6.5% of Cu, 0.3-0.5% of Cr, 0.01-0.06% of Mg, less than or equal to 0.08% of S, less than or equal to 0.15% of P and balance of Fe. Key physical and mechanical properties, such as coefficient of thermal expansion and hardness, close to those of an aluminium piston basal body, are maintained, welding strength between the insert ring and an aluminium alloy piston body is also obviously improved, and good low temperature impact toughness is achieved, so that an explosive motor is applicable to cold regions.
Description
Technical field
The present invention relates to a kind of abrasion-proof inserted ring that adopts continuous casting spheroidal graphite cast iron hollow profile made and with the method for suppersonic cleaning of its castingin when the aluminium piston.Belong to the industrial technology field.
Background technology
In the aluminium piston of high-power internal combustion engine, a kind of abrasion-proof inserted ring of castingin, its effect is to bear the high speed reciprocating friction of piston ring medial surface under multi-frequency TRANSIENT HIGH TEMPERATURE hyperbaric environment, thereby makes the life-span of aluminium piston improve several times.
The Key Performance Indicator of abrasion-proof inserted ring has four:
1, thermal expansivity will approach with the thermal expansivity (22 * 10-6/ ℃) of aluminium piston matrix as far as possible;
2, tensile strength 〉=170MPa, bending strength 〉=338MPa, Young's modulus 〉=96.5;
3, hardness is between HB130-180;
4, through dipping---behind the imbedding process and the heat seal strength 〉=50MPa between the aluminium piston.
At the engine that cold district uses, its abrasion-proof inserted ring also needs to have high low-temperature impact toughness.
In order to satisfy above-mentioned requirements, the main points of traditional production process are:
1, casts out the graphitic cast iron pipe of nickelic middle copper content with centre spinning method, in its cast iron composition except C, Si, Mn, P, S five big elements, increased by 13.5-28% Ni, 6% Cu and about 1% Cr, make its as-cast structure become austenitic state, thereby reach desired thermal expansivity and other performances.
2, go out annular edge circle, shot-peening, matting, oven dry with this pipe turning.
3, inlay cast before, in the aluminium alloy solution groove dipping 4-7 minute.
4, transfer to fixed position in the die cavity of piston liquid filling machine fast, soon in die cavity, pour into a mould molten aluminium alloy, the edge circle is embedded in the aluminium piston.
5, the aluminium piston foundry goods that studs with circle is made anneal.
6, mechanical workout aluminium piston is finished product.
With the austenitic gray cast iron abrasion-proof inserted ring that aforesaid method is made, its low-temperature impact-resistant toughness is lower, causes the explosive motor in the cold district use, often ruptures at startup moment piston and turns around.
Summary of the invention
The piston ring carrier that the purpose of this invention is to provide a kind of low-temperature impact-resistant is improved reliability and work-ing life of aluminium piston of the oil engine of the portable power machine that cold district uses.
The technical solution adopted in the present invention is, a kind of piston ring carrier of low-temperature impact-resistant, composed of the following components by mass percentage: C is 2.0-2.4%, Si is 1.4-1.8%, Mn is 0.8-1.0%, Ni is 13.0-15.0%, and Cu is 5.5-6.5%, and Cr is 0.3-0.5%, Mg is 0.01-0.06%, S≤0.08%, P≤0.15%, surplus is Fe.
Characteristics of the present invention also are,
In its metallographic structure graphite form be characterized as spherical, nodularization rate 〉=85%, more than the sphere diameter 7-8 level, graphite pebbles quantity 〉=200/mm
2
Its low-temperature impact toughness is not less than 12J under-50 ℃ of envrionment temperatures.
Another object of the present invention is a kind of preparation method of above-mentioned piston ring carrier, implements according to following steps:
1) choose the austenite spheroidal iron hollow profile of continuous casting, turning cuts out edge circle ring plate;
2) ring plate is hung in the ultrasonic cleaner, under 20-30 kilocycle frequency, cleaned 3-5 minute; Dry after going out groove;
3) to step 2) the edge circle ring plate of finishing dealing with hung in the 720-730 ℃ of aluminium liquid insulation groove dipping 4-6 minute, after the oven dry namely.
The hollow profile of austenite spheroidal iron described in the step 1) is composed of the following components by mass percentage: C is 2.0-2.4%, Si is 1.4-1.8%, Mn is 0.8-1.0%, Ni is 13.0-15.0%, and Cu is 5.5-6.5%, and Cr is 0.3-0.5%, Mg is 0.01-0.06%, S≤0.08%, P≤0.15%, surplus is Fe.
Do shake for several times during the step 3) steeping process, in order to accelerate to sweep along the effusion of gas.
In the metallographic structure of the hollow profile of austenite spheroidal iron described in the step 1) graphite form be characterized as spherical, nodularization rate 〉=85%, more than the sphere diameter 7-8 level, graphite pebbles quantity 〉=200/mm
2
The hollow profile of austenite spheroidal iron described in step 1) low-temperature impact toughness is not less than 12J under-50 ℃ of envrionment temperatures.
The invention has the beneficial effects as follows, both kept the crucial physical and mechanical property such as thermal expansivity, hardness close to aluminium piston matrix, significantly improved the heat seal strength between edge circle and the aluminium-alloy piston body again, and possess good low-temperature impact toughness, make explosive motor be applicable to that cold district uses.
Description of drawings
Fig. 1 be in the cast iron A type graphite sheet to the Photomicrograph that isolates at welding interface;
Fig. 2 be in the cast iron b type eraphite sheet to the obstruct Photomicrograph of molten aluminium welding;
Fig. 3 is size and the density Photomicrograph of 6 grades of graphite pebbless in the national sector standard;
Fig. 4 is graphite pebbles size and the density Photomicrograph of continuous casting magnesium iron hollow profile.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The invention provides a kind of piston ring carrier of low-temperature impact-resistant, composed of the following components by mass percentage: C is 2.0-2.4%, Si is 1.4-1.8%, and Mn is 0.8-1.0%, and Ni is 13.0-15.0%, Cu is 5.5-6.5%, Cr is 0.3-0.5%, and Mg is 0.01-0.06%, S≤0.08%, P≤0.15%, surplus are Fe.In its metallographic structure graphite form be characterized as spherical, nodularization rate 〉=85%, more than the sphere diameter 7-8 level, graphite pebbles quantity 〉=200/mm
2Low-temperature impact toughness is not less than 12J under-50 ℃ of envrionment temperatures.
Replace traditional nickelic austenitic iron/nickel/chromium/copper graphitic cast iron with austenite ductile cast iron, the former base of material is the cast iron hollow profile that continuous casing draws.Its alloying constituent (w%) is: C:2.0-2.4, Si:1.4-1.8, Mn:0.8-1.0, S≤0.08, P≤0.15, Ni:13.0-15.0, Cu:5.5-6.5, Cr:0.3-0.5, Mg:0.01-0.06, Fe: surplus.
Invent out abrasion-proof inserted ring and dipping thereof from the 1940's '---after the imbedding process, this conventional art has supported surplus the aluminium piston production 60 year.But along with " lightweight manufacturing " to power of IC engine density require increasing, make that the edge circle relies on former base material---the austenitic gray cast iron spun cast pipe also more and more exposes intrinsic shortcoming:
There is shrinkage porosite inevitably in the tube wall central core of a, spun cast pipe.This shrinkage porosite layer has absorbed a part of volumetric expansion of inlaying after circle is heated, and causes its thermal expansivity to lower, and is difficult to reach more than 19 * 10-6/m ℃, widens with aluminium piston matrix thermal dilation difference, causes " welding separation " and " taking off cylinder " accident easily;
Centrifugal force when b, rotational casting gets rid of heavy elements Cu, Ni to the tube wall outside, and lightweight Elements C, P, S then are gathered in the tube wall inboard, the uneven components that causes tube wall directly to make progress, and performance is inconsistent;
The graphite form of c, spun cast pipe is based on A, b type eraphite, and the area of edge circle surface exposure accounts for 10.5～11% of total surface area after turning.In the desired 700-800 of impregnation technology ℃ temperature range, graphite is dewetting for aluminium liquid, so, the graphite of surface exposure has been isolated aluminium alloy melt and the welding of inlaying circle on the respective area, caused invalid welding, from area ratio detracted aluminium the interface welding total intensity of iron composite component;
D, expose A on the dipping face, b type eraphite sheet with various angular distribution, the Qi Gou crack is darker, is difficult for being cleaned.Moreover, along with the sting erosion of aluminium liquid to the iron-based tissue, the A of dewetting, b type eraphite sheet also are extended and are wrapping among the interfacial reaction layer, form directly isolating of welding interface (seen Fig. 1, A type graphite isolates edge circle and the welding of aluminum substrate, and photo is taken from reference 1).
Distance between the b type eraphite sheet of e, chrysanthemum shape is too little, infiltration to aluminium liquid has produced wicking action, causes whole chrysanthemum cluster to soak into aluminium liquid, has formed large stretch of invalid welding and (has seen Fig. 2, b type eraphite is isolated to edge circle and aluminum substrate welding, and photo is taken from reference 2).
The eutectic cell structure of f, spun cast pipe is thick, and crystal boundary is less, is unfavorable for that the aluminium atom spreads to the crystal boundary in the cast iron, so be difficult to form the tough phase of the low silicon of high alumina in the diffusion reaction layer, the fragility phase of the low high silicon of aluminium of easy formation has reduced heat seal strength on the contrary.
Above-mentioned c, d, e kind situation in fact are to have introduced " pre-damage " to the inner boundary of aluminium/iron composite component, for crack initiation and ductile damage have been buried hidden danger.Add the existence of all the other several shortcomings, make the inner boundary heat seal strength of aluminium piston also not reach 1/3 of both sides, interface metal strength so far.The technological standard of relevant industries requires: the tensile strength 〉=185MPa of aluminium alloy bulk material (ZL109), the tensile strength 〉=170MPa of cast iron edge circle.The requirement of the heat seal strength of relevant piston ring carrier is 〉=80MPa in the early stage industry technology standard of China, (referring to the article of one of standard draftsman Liu Guoqiang---" motor car engine ring-mounted piston technical qualification and write explanation ", be stated from " internal combustion engine part ", 1990.01, P.60-64), but because manufacturing concern is difficult to reach, be revised as afterwards 〉=50MPa.
Compare with the nickelic gray iron pipe of traditional rotary casting, the distinct advantages of making abrasion-proof inserted ring of this continuous casting spheroidal graphite cast iron hollow profile is:
A, the edge circle that cuts into the turning of continuous casting magnesium iron hollow profile, graphite form are spherical, and the exposed rate of surperficial graphite only be the 6.5-7% of the total area, hang down 40% than the exposed rate of A, b type eraphite, have reduced the area of invalid welding significantly;
B, different with the graphite pebbles size of conventional cast magnesium iron, as shown in Figure 3,6 grades of graphite sphere diameters and density in the magnesium iron GB only are 100/mm
2, and the graphite pebbles in the continuous casting magnesium iron is very fine and closely woven, reaches 300-700/mm
2, Photomicrograph has as shown in Figure 4 reached 692/mm
2The graphite that exposes on turning surface is removed by ultrasonic cleaning easily, and its original (iron+graphite) Heterogeneous Composite surface has become iron-based homogeneity surface, can realize comprehensive welding with aluminium liquid.In addition, stayed the round pool of dense distribution after graphite is removed, the erosion fusion will be stung by aluminium alloy melt in the edge of this round pool, produce darker welding;
There is not the shrinkage porosite layer in the tube wall of c, continuous casting hollow profile, can not absorb inner volumetric expansion after being heated, the graphite pebbles that adds the disperse distribution more can not form austenitic matrix and isolate, so shown the thermal expansivity close to the aluminium alloy body, the thermal expansivity of aluminium alloy body 〉=19.5 * 10-6)/m ℃;
The impelling strength of d, continuous casting magnesium iron hollow profile is much higher than gray iron, and the impact value under the normal temperature of its cold impact value and conventional cast is suitable, thereby is suitable for making the part that ice box uses;
The crystal grain of e, continuous casting hollow profile is tiny, and the 4-5 that its crystal boundary density is spun cast pipe doubly.The diffusion of aluminium atom in the cast iron is mainly by the crystal boundary diffusion but not the displacement diffusion.The infiltration of a large amount of aluminium atoms, the product major part of impelling diffusion reaction is the tough phase (α-A l8SiFe2) of high alumina low silicon content, and has suppressed the appearance of the fragility phase Fe3 (Si0.9Al0.1) of the low aluminium of high silicon, thereby has improved heat seal strength.
The present invention also provides the preparation method of above-mentioned piston ring carrier, implements according to following steps:
1) choose the austenite spheroidal iron hollow profile of continuous casting, turning cuts out edge circle ring plate;
2) ring plate is hung in the ultrasonic cleaner, under 20-30 kilocycle frequency, cleaned 3-5 minute; Dry after going out groove;
3) to step 2) the edge circle ring plate of finishing dealing with hung in the 720-730 ℃ of aluminium liquid insulation groove dipping 4-6 minute, did shake for several times during the steeping process, in order to accelerate to sweep along the effusion of gas;
4) be placed into fast in the die cavity of piston liquid filling machine behind the dipping, with ZL109 aluminium alloy melt cast progressive die chamber, carry out follow-up cold and hot working at last.
Wherein step 3) according to People's Republic of China (PRC) machinery industry standard JB the method for T9762-1999 " oil engine is inlayed wear-resisting circle aluminium piston technical qualification " defined, select the used aluminium liquid composition of infiltration and holding temperature thereof, degasification mode; Step 4) according to mechanical industry standard JB the method for T9762-1999 defined, with ZL109 aluminium alloy melt cast progressive die chamber; Carry out follow-up cold and hot working and check.
Embodiment 1
1) chooses the austenite spheroidal iron hollow profile of continuous casting, turning cuts out edge circle ring plate, and its chemical ingredients is composed of the following components according to mass percent: C is that 2.2%, Si is 1.8%, Mn is 0.8%, Ni is that 14%, Cu is that 6%, Cr is 0.5%, Mg is 0.01%, S≤0.08%, P≤0.15%, surplus is Fe;
2) ring plate is hung in the ultrasonic cleaner, under 30 kilocycle frequencies, cleaned 3 minutes; Dry after going out groove;
3) to step 2) the edge circle ring plate of finishing dealing with hung in 720 ℃ of aluminium liquid insulation grooves dipping 6 minutes, did shake for several times during the steeping process, in order to accelerate to sweep along the effusion of gas;
4) be placed into fast in the die cavity of piston liquid filling machine behind the dipping, with ZL109 aluminium alloy melt cast progressive die chamber, carry out follow-up cold and hot working at last.
Embodiment 2
1) chooses the austenite spheroidal iron hollow profile of continuous casting, turning cuts out edge circle ring plate, and its chemical ingredients is composed of the following components according to mass percent: C is that 2.0%, Si is 1.6%, Mn is 1.0%, Ni is that 15.0%, Cu is that 6.5%, Cr is 0.3%, Mg is 0.03%, S≤0.08%, P≤0.15%, surplus is Fe;
2) ring plate is hung in the ultrasonic cleaner, under 25 kilocycle frequencies, cleaned 4 minutes; Dry after going out groove;
3) to step 2) the edge circle ring plate of finishing dealing with hung in 725 ℃ of aluminium liquid insulation grooves dipping 5 minutes, did shake for several times during the steeping process, in order to accelerate to sweep along the effusion of gas;
4) be placed into fast in the die cavity of piston liquid filling machine behind the dipping, with ZL109 aluminium alloy melt cast progressive die chamber, carry out follow-up cold and hot working at last.
Embodiment 3
4) choose the austenite spheroidal iron hollow profile of continuous casting, turning cuts out edge circle ring plate, and its chemical ingredients is composed of the following components according to mass percent: C is that 2.4%, Si is 1.4%, Mn is 0.9%, Ni is that 13.0%, Cu is that 5.5%, Cr is 0.4%, Mg is 0.06%, S≤0.08%, P≤0.15%, surplus is Fe;
5) ring plate is hung in the ultrasonic cleaner, under 20 kilocycle frequencies, cleaned 5 minutes; Dry after going out groove;
6) to step 2) the edge circle ring plate of finishing dealing with hung in 30 ℃ of aluminium liquid insulation grooves dipping 4 minutes, did shake for several times during the steeping process, in order to accelerate to sweep along the effusion of gas;
7) be placed into fast in the die cavity of piston liquid filling machine behind the dipping, with ZL109 aluminium alloy melt cast progressive die chamber, carry out follow-up cold and hot working at last.
Preparation method of the present invention carries out ultrasonic cleaning to the magnesium iron abrasion-proof inserted ring before dipping, to remove the exposed graphite of turning surface, make it become iron-based homogeneity surface, in order to make edge circle surface soak into welding comprehensively fully with aluminium alloy melt.
Reference
[1] Sun Lan, He Yuehui. aluminising liquid Fe content is to the influence [J] of edge circle aluminium-alloy piston ferro-aluminum land. Materials Science and Engineering of Powder Metallurgy, 2012, (17) 5:645-649.
[2] Zhang Yilin, Yang Jingfei. the aluminium piston is inlayed wear-resisting circle casting flaw and is analyzed [J]. heat processing technique, 2008,37 (13): 113-117.
Claims (8)
1. the piston ring carrier of a low-temperature impact-resistant, it is characterized in that composed of the following components by mass percentage: C is 2.0-2.4%, Si is 1.4-1.8%, Mn is 0.8-1.0%, Ni is 13.0-15.0%, and Cu is 5.5-6.5%, and Cr is 0.3-0.5%, Mg is 0.01-0.06%, S≤0.08%, P≤0.15%, surplus is Fe.
2. piston ring carrier according to claim 1 is characterized in that, in its metallographic structure graphite form be characterized as spherical, nodularization rate 〉=85%, more than the sphere diameter 7-8 level, graphite pebbles quantity 〉=200/mm
2
3. piston ring carrier according to claim 1 is characterized in that, its low-temperature impact toughness is not less than 12J under-50 ℃ of envrionment temperatures.
4. the preparation method of the described piston ring carrier of claim 1 is characterized in that, implements according to following steps:
1) choose the austenite spheroidal iron hollow profile of continuous casting, turning cuts out edge circle ring plate;
2) ring plate is hung in the ultrasonic cleaner, under 20-30 kilocycle frequency, cleaned 3-5 minute; Dry after going out groove;
3) to step 2) the edge circle ring plate of finishing dealing with hung in the 720-730 ℃ of aluminium liquid insulation groove dipping 4-6 minute, namely.
5. preparation method according to claim 4, it is characterized in that the hollow profile of austenite spheroidal iron described in the step 1) is composed of the following components by mass percentage: C is 2.0-2.4%, and Si is 1.4-1.8%, Mn is 0.8-1.0%, Ni is 13.0-15.0%, and Cu is 5.5-6.5%, and Cr is 0.3-0.5%, Mg is 0.01-0.06%, S≤0.08%, P≤0.15%, surplus is Fe.
6. according to claim 4 or 5 described preparation methods, it is characterized in that, do shake for several times during the step 3) steeping process, in order to accelerate to sweep along the effusion of gas.
7. according to each described preparation method of claim 6, it is characterized in that, in the metallographic structure of the hollow profile of austenite spheroidal iron described in the step 1) graphite form be characterized as spherical, nodularization rate 〉=85%, more than the sphere diameter 7-8 level, graphite pebbles quantity 〉=200/mm
2
8. according to each described preparation method in the claim 7, it is characterized in that the hollow profile of austenite spheroidal iron described in step 1) low-temperature impact toughness is not less than 12J under-50 ℃ of envrionment temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101759804A CN103290305A (en) | 2013-05-13 | 2013-05-13 | Piston insert ring resistant to low temperature impact and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101759804A CN103290305A (en) | 2013-05-13 | 2013-05-13 | Piston insert ring resistant to low temperature impact and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103290305A true CN103290305A (en) | 2013-09-11 |
Family
ID=49091823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101759804A Pending CN103290305A (en) | 2013-05-13 | 2013-05-13 | Piston insert ring resistant to low temperature impact and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103290305A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106811677A (en) * | 2017-04-12 | 2017-06-09 | 山东滨州渤海活塞股份有限公司 | A kind of piston ring carrier cast iron materials and its manufacture method |
| CN110935848A (en) * | 2019-12-13 | 2020-03-31 | 广州扶商缸套有限公司 | Inner cooling oil duct of aluminum alloy piston |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101100722A (en) * | 2007-07-26 | 2008-01-09 | 苏道胜 | Material for manufacturing aluminum piston abrasion-proof inserted ring |
| CN101200788A (en) * | 2006-12-16 | 2008-06-18 | 山东滨州渤海活塞股份有限公司 | Austenitic cast iron alloy used for piston ring carrier |
| US20100294229A1 (en) * | 2007-06-12 | 2010-11-25 | Wojciech Kolodziej | Engine part, and use of a cast iron alloy for an engine part |
| CN102168223A (en) * | 2011-03-30 | 2011-08-31 | 王涛 | Wear-resistant material of aluminum piston inlaid ring |
-
2013
- 2013-05-13 CN CN2013101759804A patent/CN103290305A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101200788A (en) * | 2006-12-16 | 2008-06-18 | 山东滨州渤海活塞股份有限公司 | Austenitic cast iron alloy used for piston ring carrier |
| US20100294229A1 (en) * | 2007-06-12 | 2010-11-25 | Wojciech Kolodziej | Engine part, and use of a cast iron alloy for an engine part |
| CN101100722A (en) * | 2007-07-26 | 2008-01-09 | 苏道胜 | Material for manufacturing aluminum piston abrasion-proof inserted ring |
| CN102168223A (en) * | 2011-03-30 | 2011-08-31 | 王涛 | Wear-resistant material of aluminum piston inlaid ring |
Non-Patent Citations (2)
| Title |
|---|
| 许旸，徐昌有: "用高镍-铜铸铁空心型材制作铝活塞耐磨项圈", 《内燃机与配件》 * |
| 谭锁奎: "离心铸造铝活塞高镍铸铁耐磨镶圈试验", 《汽车工艺与材料》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106811677A (en) * | 2017-04-12 | 2017-06-09 | 山东滨州渤海活塞股份有限公司 | A kind of piston ring carrier cast iron materials and its manufacture method |
| CN110935848A (en) * | 2019-12-13 | 2020-03-31 | 广州扶商缸套有限公司 | Inner cooling oil duct of aluminum alloy piston |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lakshmikanthan et al. | Microstructure, mechanical and wear properties of the A357 composites reinforced with dual sized SiC particles | |
| Zhang et al. | Impact wear resistance of WC/Hadfield steel composite and its interfacial characteristics | |
| Lin et al. | Fabrication of Al–Si–Mg functionally graded materials tube reinforced with in situ Si/Mg2Si particles by centrifugal casting | |
| Rajan et al. | Centrifugal casting of functionally graded aluminium matrix composite components | |
| Jin et al. | Friction and wear properties and mechanism of bronze–Cr–Ag composites under dry-sliding conditions | |
| CN106077609B (en) | High tenacity iron-base steam valve base made by powder metallurgy | |
| CN111136246B (en) | Preparation method of high-speed steel roller | |
| CN104498839A (en) | Stainless steel powder metallurgy key part of automobile electronic vacuum pump and preparation method of key part | |
| CN103290301A (en) | Austenitic cast iron wear-resistant insert ring inserted in aluminum piston, and preparation method thereof | |
| JP5462291B2 (en) | Alloy cast iron for manufacturing seal, seal, and method for manufacturing seal | |
| CN103243236A (en) | High-toughness wear-resistant zinc alloy containing fine crystalline grains and preparation process for same | |
| CN103290305A (en) | Piston insert ring resistant to low temperature impact and preparation method thereof | |
| CN103834851B (en) | A kind of cylinder sleeve and cylinder sleeve bore surface treatment method | |
| Wang et al. | Interfacial bonding behavior and mechanical properties of a bimetallic ring blank subjected to centrifugal casting process | |
| Rajan et al. | Formation of solidification microstructures in centrifugal cast functionally graded aluminium composites | |
| Lu et al. | Characteristics of the functionally graded coating fabricated by plasma transferred arc centrifugal cladding | |
| Liu et al. | The anisotropic wear and friction property of Inconel 718 superalloy fabricated by laser directed energy deposition | |
| WO2017155331A1 (en) | Alloy cast iron having improved wear resistance, and piston ring comprising same | |
| JPS5923846A (en) | Chilled alloy material for roll with superior cracking and wear resistance | |
| KR101626114B1 (en) | Manufacturing method of cylinder block | |
| Yang et al. | Microstructure of surface composite Al2O3/Ni on copper substrate produced by vacuum infiltration casting | |
| CN102383961A (en) | Aluminum cylinder sleeve of particle strengthened combustion motor and combination forming method with aluminum cylinder body thereof | |
| Joshi | Centrifugal casting | |
| CN104294176A (en) | Stainless steel nonmagnetic material and counterbalance prepared from same | |
| CN110106420A (en) | A kind of Co based high-temperature alloy and its preparation method and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130911 |