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1

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The Study of the Properties and Function of Large Ball Mill with Liner Material

Xie, Jing Pei ; Li, Ning Bo ; Wang, Wen Yan ; [et al.]

Trans Tech Publications, Ltd. ; 2011

In: Applied Mechanics and Materials Vol. 117-119 ( 2011-10), p. 1044-1047

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In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 117-119 ( 2011-10), p. 1044-1047

Abstract: In this paper, based on ctual large-scale ball mill liners working conditions, effects of different quenching temperature and tempering temperature on the Cr-Mo steel performance, optimize the best heat treatment process.The use of sophisticated electronic universal tensile testing machine, and Rockwell hardness testing machine for testing mechanical properties of steel materials were tested; Using the MMS-1G-type high-temperature high-speed Friction and wear tester, the wear properties of steel samples were studied using JSM-5610LV scanning electron microscope study of the tensile test fracture surfaces of steel and the friction and wear morphology. The results show that: For the high carbon alloy steel, of which 870 °C 620 °C tempered quenched specimen extension rate of 7.0% area reduction rate of 9.5%.

Type of Medium: Online Resource

ISSN: 1662-7482

URL: Issue

URL: Article

DOI: 10.4028/www.scientific.net/AMM.117-119

DOI: 10.4028/www.scientific.net/AMM.117-119.1044

Language: Unknown

Publisher: Trans Tech Publications, Ltd.

Publication Date: 2011

detail.hit.zdb_id: 2251882-4

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2

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Study on Physical and Mechanical Properties of Cu/MoS〈sub〉2〈/sub〉 Composites

Ma, Dou Qin ; Xie, Jing Pei ; Li, Ji Wen ; [et al.]

Trans Tech Publications, Ltd. ; 2013

In: Key Engineering Materials Vol. 575-576 ( 2013-9), p. 156-159

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In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 575-576 ( 2013-9), p. 156-159

Abstract: Cu-3wt. %MoS2-7wt. %Mo and Cu-3wt. %MoS2 composites were prepared by repressing, re-sintering and vacuum hot pressing, respectively. Microstructures were characterized by optical metallographic microscope, EDS, SEM and X-ray diffraction analysis, respectively. The micro hardness, electric conductivity and density of samples were separately measured as well. Results show that the micro hardness of Cu-3wt. % MoS2-7wt. % Mo composites is about 33.3% higher than that of Cu-3wt. %MoS2 composites. The increase in micro hardness is attributed to the presence of Mo. The electric conductivity of Cu-3wt. %MoS2 and Cu-3wt. %MoS2-7wt. % Mo prepared by vacuum hot pressing were 80.6 % and 63.8% IACS, respectively, which is an increase compared with values of 80.2 % and 57.3% IACS of samples obtained by repressing and re-sintering.

Type of Medium: Online Resource

ISSN: 1662-9795

URL: Issue

URL: Article

DOI: 10.4028/www.scientific.net/KEM.575-576

DOI: 10.4028/www.scientific.net/KEM.575-576.156

Language: Unknown

Publisher: Trans Tech Publications, Ltd.

Publication Date: 2013

detail.hit.zdb_id: 2073306-9

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3

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The Metastable Micro-Nanocrystals and Formation Mechanism of Rapidly Solidified Al-21Si Multi-Alloys

Wang, Ai Qin ; Han, Hui Hui ; Xie, Jing Pei ; [et al.]

Trans Tech Publications, Ltd. ; 2014

In: Key Engineering Materials Vol. 636 ( 2014-12), p. 97-100

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In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 636 ( 2014-12), p. 97-100

Abstract: In the present work, rapidly solidified Al-21Si-0.8Mg-1.5Cu-0.5Mn alloys strips was prepared by melt-spinning technique. The microstructure morphology and phase structures of experimental alloy were characterized by means of scanning electron microscopy (SEM), transmission electric microscopy (TEM) and XRD technique. The results show that the grains were refined and the micro-nanocomposite structural were formed under rapid solidification. The nucleation and growth of primary silicon were suppressed and primary silicon could not deposited, meanwhile, α-Al phase was nucleated which prior to eutectic. The microstructure of the Al-21Si alloy was composed of micro-nanostructured α-Al phase and feather-needles-like eutectic α-Al+β-Si phase. The hypereutectic Al-21Si alloy showed the hypoeutectic microstructure. The rapidly solidified Al-21Si alloy microstructure formation mechanism has also been discussed.

Type of Medium: Online Resource

ISSN: 1662-9795

URL: Issue

URL: Article

DOI: 10.4028/www.scientific.net/KEM.636

DOI: 10.4028/www.scientific.net/KEM.636.97

Language: Unknown

Publisher: Trans Tech Publications, Ltd.

Publication Date: 2014

detail.hit.zdb_id: 2073306-9

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4

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Study on the Microstructures and Wear Resistance of ZG30Cr Steel Surface Layer

Wang, Shu Li ; Wang, Ai Qin ; Xie, Jing Pei

Trans Tech Publications, Ltd. ; 2011

In: Materials Science Forum Vol. 704-705 ( 2011-12), p. 23-27

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In: Materials Science Forum, Trans Tech Publications, Ltd., Vol. 704-705 ( 2011-12), p. 23-27

Abstract: In this paper ,the WC and high-Cr Cast Iron layer were obtained on the surface of ZG30Cr steel by casting-penetrating process, the organization and wear properties of penetrating layer were studied.The results show that the layer is dense, without pores, slag and other defects, the penetrating layer and substrate are metallurgical bonding. When 30 %WC and 70 % Cr-Fe with 100～120 mesh are added to permeability agent ,the penetrating layer has the best wear resistance, is 6.8 times the matrix materials. Keywords: The layer structure; Particle size; Wear resistance

Type of Medium: Online Resource

ISSN: 1662-9752

URL: Issue

URL: Article

DOI: 10.4028/www.scientific.net/MSF.704-705

DOI: 10.4028/www.scientific.net/MSF.704-705.23

Language: Unknown

Publisher: Trans Tech Publications, Ltd.

Publication Date: 2011

detail.hit.zdb_id: 2047372-2

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5

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The Microstructure Characteristics and Wear Resistance of Rapidly Solidified Hypereutectic Al-Si Alloys

Li, Ji Wen ; Wang, Ai Qin ; Xie, Jing Pei ; [et al.]

Trans Tech Publications, Ltd. ; 2010

In: Materials Science Forum Vol. 654-656 ( 2010-6), p. 986-989

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In: Materials Science Forum, Trans Tech Publications, Ltd., Vol. 654-656 ( 2010-6), p. 986-989

Abstract: Rapidly solidified hypereutectic Al-21Si was prepared by the single roller melt-spinning technique. The microstructure morphology characteristics and phase structures of the alloy were characterized using SEM, TEM and XRD technique. The results showed that the grains were refined and the micro-nano composite structures were formed under rapid solidification. The microstructure of the Al-21Si alloy was composed of micro-nanostructured α-Al phase and feather-needle-like eutectic α-Al+β-Si phase. The α-Al phase was the leading phase in the eutectic α+Si phase. The nucleation and growth of primary silicon are suppressed and primary silicon could not be precipitated. The hypereutectic Al-21Si alloy showed the hypoeutectic solidification microstructure. Wear resistance was improved obviously when the rapidly solidified and was five times higher than that of the traditional casting alloys.

Type of Medium: Online Resource

ISSN: 1662-9752

URL: Issue

URL: Article

DOI: 10.4028/www.scientific.net/MSF.654-656

DOI: 10.4028/www.scientific.net/MSF.654-656.986

Language: Unknown

Publisher: Trans Tech Publications, Ltd.

Publication Date: 2010

detail.hit.zdb_id: 2047372-2

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6

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Synthesis and Dispersity of YBCO Powder Produced by Oxalic Acid Precipitation Method

Wang, Ai Qin ; Han, Hui Hui ; Li, Min ; [et al.]

Trans Tech Publications, Ltd. ; 2015

In: Key Engineering Materials Vol. 645-646 ( 2015-5), p. 145-150

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In: Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 645-646 ( 2015-5), p. 145-150

Abstract: The YBCO powder was prepared by oxalic acid precipitation method and consequent annealing. The correlation between pH values of oxalic acid solution and the precipitation percentage of precursors were analysed based on thermodynamics analysis. The differential scanning calorimetryanalysis (DSC) was used to confirm the synthetic technological parameter. The phases of powder in each process were investigated by XRD. The microstructures of each powder were tested by SEM and TEM. The mean grain size was calculated by the scherrer’s equation. The test results indicated that the YBCO powder with high purity, less impurities, smaller particle, but severe agglomeration, was Y123 when annealing at 900°C. However, adding dispersants could effectively solve the severe agglomeration. The size of YBCO particles was nanosized and coincided with the calculation.

Type of Medium: Online Resource

ISSN: 1662-9795

URL: Issue

URL: Article

DOI: 10.4028/www.scientific.net/KEM.645-646

DOI: 10.4028/www.scientific.net/KEM.645-646.145

Language: Unknown

Publisher: Trans Tech Publications, Ltd.

Publication Date: 2015

detail.hit.zdb_id: 2073306-9

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7

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Microstructure and Property of Rapid-Solidified Al-Si Alloys by Solution Treatment

Wang, Ai Qin ; Xie, Jing Pei ; Wang, Wen Yan ; [et al.]

Trans Tech Publications, Ltd. ; 2010

In: Advanced Materials Research Vol. 139-141 ( 2010-10), p. 243-246

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In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 139-141 ( 2010-10), p. 243-246

Abstract: A rapid-solidified hypereutectic Al-21Si-0.8Mg-1.5Cu-0.5Mn alloys strips has been prepared by single roller melt-spinning. The effects of solution technology on the microstructures and properties of the strips have been investigated by SEM, TEM. The results showed that the nucleation and growth of primary silicon are suppressed and α-Al is nucleated which prior to eutectic. The Cu, Mg and Mn are all supersaturated solution in α-Al. The major part of Si solution in α-Al, and the rest are precipitated by the micro-nanocrystals eutectic silicon. The metastable microstructures of micro-nanocrystals hypoeutectic are formed. And in the solution process, Si are precipitated from the matrix and gradually aggregate up to form small particles distributing in the matrix with the heating time. At 480°C for 100 minutes followed by quenching in water and a natural aging for 96h, the finer and more roundness of silicon particle and the maximum Vickers hardness are formed.

Type of Medium: Online Resource

ISSN: 1662-8985

URL: Issue

URL: Article

DOI: 10.4028/www.scientific.net/AMR.139-141

DOI: 10.4028/www.scientific.net/AMR.139-141.243

Language: Unknown

Publisher: Trans Tech Publications, Ltd.

Publication Date: 2010

detail.hit.zdb_id: 2265002-7

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8

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Tribological Properties of Al-21Si-0.8Mg-1.5Cu-0.5Mn Alloys against Steel under Lubrication Conditions

Wang, Ai Qin ; Xie, Jing Pei ; Wang, Wen Yan ; [et al.]

Trans Tech Publications, Ltd. ; 2011

In: Advanced Materials Research Vol. 391-392 ( 2011-12), p. 28-31

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In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 391-392 ( 2011-12), p. 28-31

Abstract: In the present work, the Al-21Si-0.8Mg-1.5Cu-0.5Mn alloys composite modified by P+RE was prepared by metal mold casting. The tribological properties against steel under lubrication conditions were experimentaled. The wear morphology characteristics and subsurface microstructure was characterized by means of optical microscope and scanning electron microscope. The effects of Si particle morphology, size, quantity and distribution on tribological properties were investigated. The wear mechanism based on lubricant abrasion was discussed. The results show that the wear mechanism of experimental alloy are mainly abrasire wear and fatigue spalling.

Type of Medium: Online Resource

ISSN: 1662-8985

URL: Issue

URL: Article

DOI: 10.4028/www.scientific.net/AMR.391-392

DOI: 10.4028/www.scientific.net/AMR.391-392.28

Language: Unknown

Publisher: Trans Tech Publications, Ltd.

Publication Date: 2011

detail.hit.zdb_id: 2265002-7

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9

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The Study on Microstructure and Thermal Expansion Property of SiCp/Al-30Si Composite Material Prepared by Hot-Pressing

Wang, Ai Qin ; Fang, Ming ; Xie, Jing Pei ; [et al.]

Trans Tech Publications, Ltd. ; 2012

In: Advanced Materials Research Vol. 490-495 ( 2012-3), p. 3859-3863

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In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 490-495 ( 2012-3), p. 3859-3863

Abstract: The SiCp/Al-30Si composite material was prepared by hot-pressing. The microstructure was characterized by means of optical microscope and SEM, the thermal expansion performance was tested by PYC-Ⅲ Thermal Expansion Coefficient Tester. It was researched that the influence of SiC particle size and manufacture technology on the microstructure and thermal expansion coefficient. Results show that shortening soaking time decreases the number and the size of the nascent and precipitating Si particles, enlarges the CTE of the composite; lager pressure is beneficial to reduce the CTE of the composite, and the larger the pressure is, the more compact microstructure is and the less number of holes are. Thermal expansion performance of the composite was influenced by SiC particle size, distribution of matrix phase, trait of interface combination and the holes.

Type of Medium: Online Resource

ISSN: 1662-8985

URL: Issue

URL: Article

DOI: 10.4028/www.scientific.net/AMR.490-495

DOI: 10.4028/www.scientific.net/AMR.490-495.3859

Language: Unknown

Publisher: Trans Tech Publications, Ltd.

Publication Date: 2012

detail.hit.zdb_id: 2265002-7

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10

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Behaviors of TiN Nanoparticles in Mn18Cr2 Steel

Li, Yan ; Xie, Jing Pei ; Yu, Hui Wu ; [et al.]

Trans Tech Publications, Ltd. ; 2011

In: Applied Mechanics and Materials Vol. 117-119 ( 2011-10), p. 897-900

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In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 117-119 ( 2011-10), p. 897-900

Abstract: Mn18Cr2 steel is one of austenitic deformation strengthening steel. The existing form of TiN and its influence on the austenitic structure in the steel by adding small amounts of TiN nanoparticles are discussed in this study, which may provide some advices to explore new way to strengthen high manganese steel. The microstructures of Mn18Cr2 steel added small amounts of TiN nanoparticles are observed by Transmission Electron Microscopy (TEM). The results show that TiN nanoparticles exist in austenite and there have a very good match interface between the two phases, the crystal face relationship are {220} γ //{220} N , {422} γ //{422} N , (111) γ //(200) N , orientation relationship are 〈 110 〉 γ // 〈 110 〉 N , 〈 211 〉 γ // 〈 211 〉 N , [112] γ // [011] N , moreover, the relationship of (111) γ and (200) N is not only parallel but also coherent. Meanwhile, there are many high density dislocations, a small amount of stacking faults, twins and ε-martensite in the austenite due to the role of TiN nanoparticles.

Type of Medium: Online Resource

ISSN: 1662-7482

URL: Issue

URL: Article

DOI: 10.4028/www.scientific.net/AMM.117-119

DOI: 10.4028/www.scientific.net/AMM.117-119.897

Language: Unknown

Publisher: Trans Tech Publications, Ltd.

Publication Date: 2011

detail.hit.zdb_id: 2251882-4

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