Beijing Gang Yan Diamond Products Company

Beijing, China

Beijing Gang Yan Diamond Products Company

Beijing, China

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Shu H.-X.,Beijing GangYan Diamond Products Company | Zhang G.-Q.,Beijing GangYan Diamond Products Company | He Z.-F.,Beijing GangYan Diamond Products Company | Xu Z.-P.,Beijing GangYan Diamond Products Company
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2012

In order to obtain good quality and tight thickness deviation of green segment of diamond saw blade, granulating treatment of the metal powder is needed to improve the flowability and bulk density of the powder. In this paper, two granulating processes, namely sieve rubbing method and high speed stirring granulation method were experimentally studied and compared. Powder particle morphology, bulk density, flowability, as well as the green segment properties were tested. The results showed that: the powders prepared by sieve rubbing method had lower bulk density, while the powders prepared by high speed stirring granulation method had a batter flowability. Meanwhile, the green segment made with the powders from high speed stirring granulation method showed an improved mass homogeneity.


Sun Y.,Jilin University | Gao K.,Jilin University | Zhang L.,Wuxi Drilling Tools Factory | Li S.,YELLOW AND CO | And 2 more authors.
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2012

The theory of the coupling bionics was applied to design of the impregnated diamond bit, and the coupling bionic impregnated diamond bit (referred to as the coupling bionics bit) was developed. The drilling speed of bionic bit is faster and the using life is longer compared with the ordinary impregnated diamond bit. By using the characteristics of high efficiency soil breaking, wear resistance and drag decreasing of the body surface of soil animals, the contact stress state between bionic bit and rock under static and dynamic condition was investigated by analyzing the cuttings and by finite element numerical modeling. The results revealed that the cuttings discharge, cooling effect and rock stress state of bionic coupling bit were superior to those of conventional diamond bit, and showed the features of high efficient rock breaking and high wear resistance.


Cao C.,Central Iron & Research Institute Group | Liu Y.,Central Iron & Research Institute Group | Liu Y.,Beijing Gang Yan Diamond Products Company | Xu L.,Beijing Gang Yan Diamond Products Company | And 2 more authors.
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2015

In order to study the influence of granulating process on the properties of Cu-Sn prealloy powder diamond tools, the experiment was carried out through adding different types and different contents of granulating agents. Furthermore, the granulated powders prepared at the same condition were to be dewaxed at different temperatures. Then, the changes of mechanical properties of hot-pressing sintering diamond tool samples were tested. The results showed that KCP-1700 was the most applicable granulating agent in this experiment, and that adding different kinds of granulating agents all caused the reduction of mechanical properties of the samples. It was also shown that the mechanical properties of the mixed powder were significantly increased when the content of granulating agent was over 130 mL/kg, and that 400 ℃ dewaxing process would basically make granulating agent completely decomposed, so the granulated powder could meet both the requirements of cold pressing process and the demand of mechanical properties of sintered sample at the same time. ©, 2015, Zhengzhou Institute of Abrasives Grinding. All right reserved.


Yang H.,Beijing Gang Yan Diamond Products Company | Liu Y.,Beijing Gang Yan Diamond Products Company
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2016

To study the influence of fixing agent on quality of brazed diamond tools, three agents namely SZ, NH and GY are made into testing samples. Their surfaces are observed and actual cutting & drilling experiments are implemented. Results show that GY agent leaves least residual carbide with best appearance, while NH agent ranks second and SZ agent performs worst. As with the blades and bits made with these three agents, those made with GY agent have longest work life and fastest speed, followed by those made with NH agent and those made with SZ agent lists in the bottom. © 2016, Diamond & Abrasives Engineering Editorial Office. All right reserved.


Xu Q.,Central Iron & Research Institute Group | Liu Y.,Central Iron & Research Institute Group | Liu Y.,Beijing Gang Yan Diamond Products Company | Xu L.,Beijing Gang Yan Diamond Products Company | Yang Z.,Beijing Gang Yan Diamond Products Company
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2016

The diamond bit matrix formulas are designed by uniform design with constraints to study the effects of diamond bit matrix formula on sharpness and life. Nonlinear regression analysis of experimental data is performed in SPSS to obtain the relationship between the performance and the component. At the same time, the sequence of influence factors and the significance are revealed using t test. Finally, the optimized formula is obtained through excel programming. The results show that the established Scheffe regression equation has a good fit to the experimental results. The content of Co element has a significant influence on the sharpness and life of diamond bit. The uniform design of the formula can reach desired result with less tests. © 2016, Diamond & Abrasives Engineering Editorial Office. All right reserved.


Liu Y.,Beijing Gang Yan Diamond Products Company | Wang L.,GRIPM Advanced Materials Co. | Wang L.,CompuTherm LLC | Zhang C.,CompuTherm LLC
Advanced Materials Research | Year: 2013

Rare earth silicates (RE2SiO5 or RE2Si2O7; RE=Er, Lu, Y, Yb etc.) possess a low silica activity and good thermal stability, making them good candidates for EBC top coating materials. We have performed first-principles total energy calculations for the Er2O3-SiO2 pseudo binary system. The crystal lattice parameters and internal atomic coordinates of Er2SiO5 and Er2Si2O7 are optimized, and the electronic structure and formation enthalpies are calculated. The present study provides a theoretical basis for exploring practical applications of the materials. © (2013) Trans Tech Publications, Switzerland.


Shen X.,Advanced Technology & Materials Co. | Shen X.,Beijing Special Powder Metallurgy Materials Engineering and Technology Research Center | Yao J.,Beijing Gang Yan Diamond Products Company | Ma H.,Advanced Technology & Materials Co. | And 3 more authors.
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2015

The hot pressing sintering organization, XRD phase composition and the mechanical properties of alloy powder containing 10wt%, 15wt%, 20wt% Sn respectively were researched systematically. It was identified that due to the low sintering temperature of Cu-Sn powder, the densification could be achieved at 700-720 ℃, and that the single solid solution sintering organization containing 10wt% of Sn was converted to two phases electronic compounds organization, which coincided with XRD spectrum inclination. The bending strength, which stayed around 700 MPa, changed little with increasing Sn content, while impact toughness dropped from 17 J to 3 J. Taking the matrix characteristics into consideration it was concluded that the Cu-Sn powder, when used as matrix, was conducive to improve the machining efficiency of tools. ©, 2015, Zhengzhou Institute of Abrasives Grinding. All right reserved.


Shen N.-N.,Control Iron and Steel Research Institute, China | Chen Z.,Control Iron and Steel Research Institute, China | Chen Z.,Beijing Gang Yan Diamond Products Company | Liu Y.-B.,Control Iron and Steel Research Institute, China | And 2 more authors.
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2013

Three formulations of matrix are designed in this research, namely Al2O3 (1.2% mass fraction) dispersion-strengthened CuSn20 powder, the mixed powder of the nickel carbonyl (8% mass fraction) and CuSn20, as well as the mixed powder of Cu-Fe-Co pre-alloyed powder (8% mass fraction) and CuSn20.The characteristics of these three formulations are compared with CuSn20 without adding any element, including the hardness, the strength and the cutting performance of the four kinds of saw blades, to get the best formulation of matrix for cutting ceramic, and to explore the link between the cutting performance and matrix performance. The result indicates that the hardness and strength of the matrix of Al2O3 dispersion-strengthened CuSn20 increase significantly while the toughness is reduced, and that the matrix is so brittle that the saw blades consume excessively when cutting ceramic, thus decreasing the cutting efficiency and life. As for the mixed powder with 8% mass fraction Ni and 8% mass fraction Cu-Fe-Co, the hardness and strength of the matrix is enhanced significantly as well as the cutting efficiency and the life of the saw blades, between which the cutting efficiency of former is higher, and the life of the latter is longer.


Xu L.,Beijing Gangyan Diamond Products Company | Qu X.-H.,University of Science and Technology Beijing | Liu Y.-B.,Beijing Gangyan Diamond Products Company
Gongneng Cailiao/Journal of Functional Materials | Year: 2011

This paper applied twice plating on diamond, first the diamond surface was plated with Cr using magnetron sputtering method, and then the diamond with Cr-plating was put into rotary drum to be barrel plated thicker with Cu element; after copper plating the mass ratio of diamond and copper can reach 1:1-1:2, and the thickness of copper plating can be to 3-20 microns. The diamond with copper plating was sintered in mold by SPS method and then got diamond-Cu composites. The thermal conductivity of composites was up to 480W/(m·K). The process can be a good solution to solve the problem of uneven mixing because of the large proportion difference between diamond and copper, which greatly improves the thermal conductivity.


Cao C.,Central Iron & Research Institute Group | Liu Y.,Central Iron & Research Institute Group | Liu Y.,Beijing Gang Yan Diamond Products Company | Xu L.,Beijing Gang Yan Diamond Products Company | And 2 more authors.
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2016

In order to study the influence of sintering process on the properties of Cu-Sn pre-alloy powder with high Sn content, orthogonal experiment was carried out. The influence factors and optimal parameters were determined using range analysis method, and the experimental results were compared using SEM, microstructure observation and mechanical property tests, etc. The results showed that as with density, hardness and wear resistance of the samples sintering temperature had the biggest influence, followed by holding time and pressure while as with bending strength of the samples, sintering temperature came first, followed by pressure and holding time. It was shown that when the sintering parameters were 440 ℃, 180 s and 10 MPa, the properties was better, which could be optimal experimental program. © 2016, Diamond & Abrasives Engineering Editorial Office. All right reserved.

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