Beijing Beiye Functional Materials Corporation

Beijing, China

Beijing Beiye Functional Materials Corporation

Beijing, China
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Shi Q.,University of Michigan | An N.,Beijing Beiye Functional Materials Corporation | Huo J.,University of Science and Technology Beijing | Zheng Y.,University of Science and Technology Beijing | Feng Q.,University of Science and Technology Beijing
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science | Year: 2017

The effect of Co on discontinuous precipitation (DP) transformation involving the formation of topologically close-packed (TCP) phase was investigated in three Ni-Cr-Re model alloys containing different levels of Co. One typical TCP phase, σ, was generated within DP cellular colonies along the migrating grain boundaries in experimental alloys during aging treatment. As a result of the increased solubility of Re in the γ matrix and enlarged interlamellar spacing of σ precipitates inside of growing DP colonies, Co addition suppressed the formation of σ phase and associated DP colonies. This study suggests that Co could potentially serve as a microstructural stabilizer in Re-containing Ni-base superalloys, which provides an alternative method for the composition optimization of superalloys. © 2017, The Minerals, Metals & Materials Society and ASM International.


Yang J.,Yanshan University | Tian J.,Beijing Beiye Functional Materials Co. | Hao F.,The Aerospace Corporation | Dan T.,The Aerospace Corporation | And 3 more authors.
Applied Surface Science | Year: 2014

Hardfacing (harden-surface-welding) metal of the hypereutectic Fe-Cr-C alloy with different La2O3 additives was developed. The microstructure of the hardfacing metal was observed by optical microscopy. The phase structure was determined by X-ray diffraction. The hardness and wear resistance of the hardfacing metal were measured by hardness tester and dry sand rubber wheel abrasive tester, respectively. The worn surface morphology was observed by field emission scanning electron microscope equipped with energy dispersive X-ray spectrometry. The solidification curve of the hardfacing metal and the relationship between the content of each phase and the temperature were calculated by thermodynamics software Thermo-Calc and Jmatpro, respectively. The results indicate that, with the increase of the La2O3 additives, the dimension of the primary M7C3 carbide in the hypereutectic Fe-Cr-C alloy hardfacing metal decreases gradually. When the La2O3 additive is 0.78 wt.%, it reaches minimum, which is 11.37 μm. The amount of M7C3 carbide (including the primary carbide and the eutectic carbide) decreases firstly then increases. The hardness of the hardfacing metal increases smally, while the wear resistance of it increases firstly then decreases and reaches the most excellent when the La2O3 additive is 0.78 wt.%. The formation temperature of M7C3 carbide is higher than that of austenite in the hypereutectic Fe-Cr-C alloy hardfacing metal. Austenite precipitated in the liquid phase can improve the precipitation rate of M7C3 carbide in a certain extent. As the temperature of the molten pool drops from 870 C to 840 C, γ-Fe transforms into α-Fe completely, so a large number of C atoms precipitate, which promotes the growth of the M 7C3 carbide in short period. © 2013 Elsevier B.V.


Zhang Q.Q.,Beijing Beiye Functional Materials Corporation | Li M.Y.,Beijing Beiye Functional Materials Corporation | Wei R.,Beijing Beiye Functional Materials Corporation | Wu H.Y.,Beijing Beiye Functional Materials Corporation | Li Z.R.,Beijing Beiye Functional Materials Corporation
Materials Science Forum | Year: 2016

Ni-Cr-Co type Nickel-based super alloy Inconel 740H was studied. The effect of Nb, Al and Ti on the equilibrium of this alloy was analyzed by JMatPro software. The amount of Ti and Nb should be controlled by 1.50wt.%, and meanwhile, Al should be 1.0-2.0wt.%. If Mo and W were added the amount of Mo should be in the range of 1.0-2.0wt. %, and W should be about 1.0wt.%. Based on these results, three types of new alloys were designed, which contain Ni-Cr-Co-Mo type(1#), Ni-Cr-Co-W type(2#) and Ni-Cr-Co-Mo-W type(3#). Compared with the Ni-Cr-Co type Inconel 740H alloy, the room temperature strength, high temperature strength and high temperature durable performance of the three new alloys improved, which can provide the evidence and reference to optimize the chemical composition of Inconel 740H alloy, i.e., adding 1.50wt.% Mo and 1.0wt.% W individually or together. © 2016 Trans Tech Publications, Switzerland.


Yu M.,Beijing Beiye Functional Materials Corporation | Cai K.H.,Beijing Beiye Functional Materials Corporation | Li Z.R.,Beijing Beiye Functional Materials Corporation
Materials Science Forum | Year: 2016

The effects of alloying elements including tungsten, molybdenum and cobalt on the thermal expansion and mechanical properties of Ni-Mo-Cr superalloys were investigated. It was founded that cobalt had no influence on the thermal expansion properties of the alloys. The addition of proper amount of tungsten reduced the coefficient of thermal expansion and increased the mechanical properties of alloy both at room temperature and at high temperature. Reducing the amount of molybdenum and increasing the amount of tungsten were helpful to reduce the coefficient of thermal expansion of the alloys at high temperature and improved the performance consistency of the coefficient of thermal expansion from low to high temperature. © 2016 Trans Tech Publications, Switzerland.


Wang C.,Beijing Beiye Functional Materials Corporation | Li Z.R.,Beijing Beiye Functional Materials Corporation | Niu Y.J.,Beijing Beiye Functional Materials Corporation | Shi S.F.,Beijing Beiye Functional Materials Corporation | An N.,Beijing Beiye Functional Materials Corporation
Materials Science Forum | Year: 2016

The causes and the influence factors of the defects of center porosity and secondary pipe of the casting superalloy ingot are briefly introduced, and the study on the principle and technical characters of grain refinement technology with dynamic methods carried out. The mechanism, working parameter and the test result of the typical application methods including the technologies of vibration of ultrasonic, the vibration of mould, the stir of mould and oscillation in the riser were investigated in detail. By comparing the advantages and disadvantages of different methods and also according to the practical production situation of our company, the most appropriate one for improving the defects of center porosity and secondary pipe is proposed. © 2016 Trans Tech Publications, Switzerland.


Zhang R.,Beijing Beiye Functional Materials Corporation | Song D.,Beijing Beiye Functional Materials Corporation | Du T.,Beijing Beiye Functional Materials Corporation | Zhang J.,Beijing Beiye Functional Materials Corporation | Dong J.,Beijing Beiye Functional Materials Corporation
Procedia Engineering | Year: 2012

Alloy 3J40 is a nickel-based alloy with high hardness and high elasticity. Alloy 3J40 was widely used as bears and conical pivots in many fields, such as, navigation, aviation and antiaircraft gun due to its excellent properties of elasticity, strength, hardness, corrosion resistance, nonmagnetic characteristics and so on. However, after aging treatment, the hardness of 3J40 alloy was uneven, there were large differences in hardness between the air-cooled and the furnace-cooling alloys, and the properties were unstable. Previous researches basely focused on the distribution, size, shape and other aspects of inclusions, to improve the plasticity and thermal processing properties of the alloy. Studies about properties and microstructure of the alloy devoted to the studies of the traditional Ni3Al-γ-phase. Up to now no public research report had been found about the α-Cr phase strengthening mechanism of the 3J40 alloy. In this paper, the effect of α-Cr phase on the strengthen mechanism in 3J40 alloy was investigated. By thermodynamic phase equilibrium calculation, the possible phases, which may precipitate after heat treatment, have been predicted. Relationships between the mechanical properties and the ageing heat treatment parameters, such as, ageing temperature, ageing time and cooling rate, had been studied. Microstructure of the alloy under different heat-treatment process has been analyzed, especially cared about the morphology, particles size and quantity of the α-Cr phase. And the strengthening mechanism was also investigated. The results showed that the microstructure of the aged 3J40 alloy were composed of γ-based phase, precipitated γ' phase, (Ni3Al) phase, and α-Cr phase in granular and laminar. And the main contribution for the strengthen mechanism may be associated with the α-Cr phase laminar. © 2011 Published by Elsevier Ltd.


Zhang Q.,Beijing Beiye Functional Materials Corporation | Zhu G.,University of Science and Technology Beijing | Hu B.,Beijing Beiye Functional Materials Corporation
Procedia Engineering | Year: 2012

The effect of diffusion annealing on composition uniformity of Hastelloy C-276 ingot has been investigated. The alloy ingots were annealed under the condition of 1120°C(for 10h and 70h), 1170°C(10h and 20h) and 1200°C(10h and 15h). The dendrite spacing and composition segregation of Hastelloy C-276 of both the as-cast ingot and homogenized ingots were studied by means of thermal-calc software, optical microscopy and SEM. The experimental results demonstrated that dendrites segregation and Mo segregation existed in the as-cast C276 alloy ingots. The largest dendrite spacing was in the area of 1/2R(radius), The largest degree segregation of Mo elements was in the edge area of the ingots, and the segregation coefficient was 1.278. After diffusion annealing of holding in 1120°C, 1170°C and 1200°C, for 10 to 70h, it was observed that the dendrite segregation was not completely eliminated after annealing of 1120°C, although M6C carbide was completely dissolved, μ phase still exist, illustrating that the segregation of Mo elements was not completely eliminated. I the segregation of Mo elements was almost eliminated and the segregation coefficient was below 1.02 after annealing of 1170°C and 1200°C. The dendrite segregation was almost eliminated after annealing of 1200°C. Based on the above results, the ideal temperature of diffusion annealing of C276 alloy ingot is recommend to be in the temperature range of 1170∼1200°C © 2011 Published by Elsevier Ltd.


Li Z.R.,Beijing Beiye Functional Materials Corporation | An N.,Beijing Beiye Functional Materials Corporation
Materials Science Forum | Year: 2016

This study aims to explore the influence of morphology and distribution characteristic of carbides on stress rupture property at high temperature. The stress rupture life at 850℃/325MPa was tested. Meanwhile, microstructure and fracture morphology of stress rupture specimens were observed by scanning electron microscopy. The types of carbides were identified and the carbide size was also measured. The results show that the alloys with small size, uniformly distribution and moderate number of carbides present a high stress rupture performance. © 2016 Trans Tech Publications, Switzerland.


Jiao S.-Y.,University of Science and Technology Beijing | Zhu G.-N.,University of Science and Technology Beijing | Dong J.-X.,University of Science and Technology Beijing | Zhang Q.-Q.,Beijing Beiye Functional Materials Corporation
Cailiao Gongcheng/Journal of Materials Engineering | Year: 2011

The phase evolution and Mo mass fraction variation law when Hastelloy C-276 thermally aged at 550, 750, 800°C for different time were studied. The results show that the carbide is precipitated along grain boundary for short aging time, and the Mo mass fraction firstly decreases to a minimum value about 6% (mass fraction) with carbide precipitation, then increases with aging time duration. Since the Mo content in nickel-based corrosion resistant alloy is vital to the alloy's resistance ability, the carbide precipitation process and Mo mass fraction variation near grain boundary (GB) were simulated according to Thermo-Calc calculation, John-Mel transformations kinetics and Fick second diffusion law. The comparison results between the simulated and measured mass fraction of Mo are in good agreement, this signifies that the Mo mass fraction distribution near GB can be predicted by the model presented in this work. Based on simulation results, proper heat treatment conditions for this alloy can be proposed according to the requirement of Mo content in the service corrosion environments.


Zhang L.,University of Science and Technology Beijing | Gao C.,University of Science and Technology Beijing | Li C.,Beijing Beiye Functional Materials Corporation | Peng J.,Beijing Beiye Functional Materials Corporation
JOM | Year: 2014

In this article, a numerical simulation model on the solidification of 1J51 Fe-Ni based alloy under vacuum conditions was established using ProCAST software (ESI Group, Paris, France). The calculated temperature profiles of the mold and the solidification profile of the ingot were compared with the measurement, showing a reasonable agreement. The validated model was then used to study the effects of the insulation condition, filling rate, and maximum filling fraction on the solidification state and porosity distribution of the ingot. It was indicated that the shrinkage cavity position of ingot with zirconia fiber was lower than that without zirconia fiber, and the likelihood of centerline shrinkage porosity was independent of the insulation method. The position of macroporosity varied little when the filling rate was from 2.17 kg/s to 5.17 kg/s, while serious solidification defects occurred in the body of ingot when the filling rate was lower than 4.17 kg/s. Increasing the maximum filling fraction had a positive impact on the rise of shrinkage cavity position, but it was hardly advisable because the metal yield decreased with the increase of the maximum filling fraction. Considering the above parameters discussed in this article, it was proposed to remove the zirconia fiber layer for the industrial practice. © 2014 The Minerals, Metals & Materials Society.

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