China National Erzhong Group Co.

Deyang, China

China National Erzhong Group Co.

Deyang, China
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This report provides major statistics on the state of the industry and is a valuable source of guidance and direction for companies and individuals interested in the market — The global market for Hot Forging Press is expected to reach about 394 Units by 2022 from 317 Units in 2017, registering a Compounded Annual Growth Rate (CAGR) of 4.45% during the analysis period, 2016-2022. Companies profiled in this report are Sms, Sumitomo, Tmp, Schuler, Fagor Arrasate, Komatsu, Lasco, Kurimoto, First Heavy, Stamtec, Ajax, Mitsubishi, Erie, J&h, Qingdao Yiyou, Yandon, Nhi, China National Erzhong Group and more. Analysis by Product Types, with production, revenue, price, market share and growth rate of each type, can be divided into • 100000 KN Analysis by Applications, this report focuses on consumption, market share and growth rate of Hot Forging Press in each application, can be divided into • Automotive Industry • Hardware Tools • Engineering Machinery • Others Table of Contents: 1 Hot Forging Press Market Overview 2 Global Hot Forging Press Market Competition by Manufacturers 3 Global Hot Forging Press Production, Revenue (Value) by Regions (2012-2017) 4 Global Hot Forging Press Supply (Production), Consumption, Export, Import by Regions (2012-2017) 5 Global Hot Forging Press Production, Revenue (Value), Price Trend by Types 6 Global Hot Forging Press Market Analysis by Applications 7 Global Hot Forging Press Manufacturers Profiles/Analysis 8 Hot Forging Press Manufacturing Cost Analysis 9 Industrial Chain, Sourcing Strategy and Downstream Buyers 10 Marketing Strategy Analysis, Distributors/Traders 11 Market Effect Factors Analysis 12 Global Hot Forging Press Market Forecast (2017-2022) 13 Research Findings and Conclusion 14 Appendix Inquire more about this report at: For more information, please visit

Yan M.,Yanshan University | Huang H.-G.,Yanshan University | Zhang C.-Y.,Yanshan University | Du F.-S.,Yanshan University | Zhang S.-B.,China National Erzhong Group Company
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2017

In order to reduce the metal removal of head and tail and improve the hot rolled aluminum plate yield, taking 5052 aluminum alloy as an object, the effects of strip thickness and rolling reduction on metal removal of head and tail were simulated and the prediction model of head and tail was precisely established. Then the head and tail evolution rules were studied under the conditions of general plane shape, circular plane shape and trapezoidal plane shape of the slab head and end in the process of multi pass reversing rolling. The results show that the cropping is reduced by 18%-20% under the condition of circular and trapezoidal cross-section. In order to testify the correctness of finite element simulation results, the prediction model of head and tail under the condition of general plane shape is applied to the actual rolling schedule, and the prediction results are consistent with the in-site measurement data. Considering the milling process of ingot end face, the trapezoidal plane shape is more suitable for the hot rolling production of aluminum alloy thick plate at this stage. © 2017, Science Press. All right reserved.

Liu X.,Yanshan University | Han S.,Yanshan University | Chen L.,Yanshan University | Yang S.,Yanshan University | And 3 more authors.
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science | Year: 2017

Hot deformation behavior of 7A85 high-strength aluminum alloy was investigated at 593 K to 713 K (320 °C to 440 °C) and 0.01-10 s−1. The manifestation of flow curves was related to the strain rate. Typical single-peak curves were shown below 10 s−1, while two stress peaks appeared in the case of 10 s−1 and the second peak strain was almost three times larger than the first one. A constitutive equation considering the effect of strain was developed. Flow stress values predicted by the constitutive model demonstrated a good agreement with the experimental results over the entire range of strain rates and temperatures. Microstructure characterization revealed that dynamic recovery (DRV) and continuous dynamic recrystallization (CDRX) which depended on the Zener–Hollomon parameter (Z) closely, co-occurred at large strain (ε = 0.7). With decreasing Z-value, the dominant dynamic restoration mechanism gradually transformed from DRV to CDRX. The average subgrain size (dsub) showed a power-law relationship with Z. Recrystallization was sensitively dependent on the strain rate at above 683 K (410 °C). The fine equiaxed grains appeared at original grain boundaries and in deformed grains interior owing to CDRX. The high-curvature subgrain boundaries can also cause the nucleation of recrystallization within deformed grains. © 2017 The Minerals, Metals & Materials Society and ASM International

Yang J.-D.,Chongqing University | Wu J.-Q.,Chongqing University | Deng Y.,China National Erzhong Group Co.
Advanced Materials Research | Year: 2011

The article gives a solution to the precise synchronous control of multi-hydraulic cylinders which exist in the large-sized pressure and flattening machine by the virtual axis method. To fulfill the job, the scheme introduces the acceleration feedback to the virtual control model to make the model practical. According to the Newton's mechanical law and fluid mechanic, the article set up the model mentioned above. The control system presented is investigated through simulation of Matlab under step disturbance and productive practice which successfully demonstrate the effectiveness of the proposed control model. © (2011) Trans Tech Publications, Switzerland.

Quan G.-Z.,Chongqing University | Wu D.-S.,Chongqing University | Luo G.-C.,Chongqing University | Xia Y.-F.,Chongqing University | And 3 more authors.
Materials Science and Engineering A | Year: 2013

In order to evaluate the dynamic recrystallization (DRX) behavior of as-cast Ti-6Al-2Zr-1Mo-1V alloy, a series of compressions with a height reduction of 60% were performed in a temperature range of 1073-1323K (0.55-0.68Tm) and a strain rate range of 0.01-10s-1 on a Gleeble1500 thermo-mechanical simulator. By the regression analysis for conventional hyperbolic sine equation, the activation energy of DRX was determined as Q=933.3233kJmol-1, and a dimensionless parameter controlling the stored energy were determined as Z/A=εexp[(933.3233×103)/8.31T]/6.17726×1036. According to the strain hardening rate curves (dσ/dε versus σ), three characteristic parameters including the critical strain for DRX initiation (εc), the strain for peak stress (εp), and the strain for maximum softening rate (ε*) were identified. A modified Avrami type equation XDRX=1-exp{-[(ε-εc/ε*)]m} was introduced to characterize the evolution of DRX volume fraction in α-phase temperatures under 0.59Tm, in which εc, ε* and m were described as εc=0.028774(Z/A)0.04665,ε*=0.45379(Z/A)-6.118274e-4 and m=4.133402 respectively. The evolution of DRX volume was described as the following: for a fixed strain rate, the strain required for the same amount of DRX volume fraction increases with decreasing deformation temperature, in contrast, for a fixed temperature, it increases with increasing strain rate. Finally, the theoretical predictions were validated by the microstructure graphs. © 2013 Elsevier B.V.

Quan G.-Z.,Chongqing University | Luo G.-C.,Chongqing University | Liang J.-T.,Chongqing University | Wu D.-S.,Chongqing University | And 2 more authors.
Computational Materials Science | Year: 2015

In order to evaluate the dynamic recrystallization (DRX) behaviors in α + β-phase temperature range of Ti-6Al-4V alloy, a series of isothermal compression tests with a fixed height reduction of 60% were performed in the temperature range of 1023-1323 K and the strain rate range of 0.01-10 s-1 on a Gleeble-3500 thermo-mechanical simulator. According to the strain hardening rate curves (dσ/dε versus σ), two characteristic parameters involving the critical strain for DRX initiation (εc) and the strain for peak stress (εp) were identified. The Johnson-Mehl-Avrami-Kolmogorov (JMAK) type equation XDRX=1-exp[-βd(ε- εc/ε0.5)kd was introduced to characterize the evolution of DRX volume fraction. By further analysis of the true stress-strain curves, the material constants kd and βd were determined to be 0.5994 and 0.9339, respectively; εc was described as εc = 0.1311εp, where εp=0.0064ε0.0801exp(30579/RT); ε0.5 was described as ε0.5=0.022×ε0.11146exp(26430/RT). The evolution of DRX volume fraction was described as following: for a fixed strain rate, the deformation strain required for the same amount of DRX volume fraction increases with decreasing deformation temperature. In contrast, for a fixed temperature, it increases with increasing strain rate. As the developed JMAK type equation was applied in the finite element simulation model, a series of simulations for the hot compressions in accordance with experimental conditions were conducted, and the DRX volume fraction distributions in deformed materials were uncovered. Finally, the theoretical predictions and numerical results were validated by the microstructure graphs.

Yu J.,Chongqing University | Liu J.,Chongqing University | Chen X.,China National Erzhong Group Co. | Liu J.,China National Erzhong Group Co.
Applied Mathematics and Information Sciences | Year: 2011

According to the special requirements of Sheet Molding Compound (SMC) a set of quadrangular leveling system is designed, whose leveling precision is controlled by electro-hydraulic proportional technology. Based on analyzing the components and working principle of the quadrangular leveling system, the mathematical model of this system is established. The dynamic characteristics of stability and anti-interference are simulated and analyzed. The results show that the main factors that can affect the dynamic characteristics of system are obtained and the system completely meets technical requirement after being corrected, the work in this paper can provide a high guidance for presses of similar kinds. © 2011 NSP.

Huang S.-Q.,Central South University | Yi Y.-P.,Central South University | Li P.-C.,China National Erzhong Group Co
Fenmo Yejin Cailiao Kexue yu Gongcheng/Materials Science and Engineering of Powder Metallurgy | Year: 2013

The static recrystallization behaviors of 23Co13Ni11Cr3Mo ultrahigh strength steel were investigated by GleebIe-1500 machine. Effects of deformation temperature, strain rate, deformation degree, interval time and initial austenite grain size on static recrystallization behaviors were studied. The results show that the effect of deformation degree is more significant, while those of strain rate and initial austenite grain size are little slight. Small and even grain can be achieved by increasing deformation degree. Based on experimental results, grain size model of static recrystallization for 23Co13Ni11Cr3Mo steel was developed. Microstructure evolution of landing gear during integer die forging on hammer press was analyzed quantitatively by the established model. Static recrystallization under low deformation degree is found to be the reason for grain dissatisfaction. And a good fitness between experimental results and predicted results is achieved in landing forging process.

Huang S.,Central South University | Yi Y.,Central South University | Li P.,China National Erzhong Group Co.
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | Year: 2011

High strain isothermal compression tests were carried out in Gleeble 1500 to study high temperature deformation behavior of 23Co13Ni11Cr3Mo ultrahigh strength steel. The results show that flow stress decreases with temperature increasing, while increases with strain rate increasing. DRX softening played an important role at high temperature and low strain rate. Flow stress decreased about 29.6% from peak stress at 1000°C and 0.001 s -1. The 23Co13Ni11Cr3Mo ultrahigh strength steel is suit to forge at 1000-1100°C and strain rate 0.01-1 s -1. At these deformation conditions, sufficiect DRX occurred, grain size was small and changed little with temperature or strain rate increasing. Moreover, based on the experiment results, peak stress and steady grain size model were estalblished. The predicted values of this model agreed well with the experiment values. © Copyright.

Guo B.,Yanshan University | Ji H.,Yanshan University | Liu X.,Yanshan University | Gao L.,Yanshan University | And 3 more authors.
Journal of Materials Engineering and Performance | Year: 2012

In this study, the hot deformation behavior of austenitic stainless steel was investigated using Gleeble-3500 thermomechanical simulator at deformation temperatures in the range of 900-1200 °C and strain rates in the range of 0.001-10 s -1. The effects of initial austenitic grain size and deformation conditions on hot deformation behavior of 316LN were analyzed through true stress-strain curves under different deformation conditions. Both the constitutive equation and processing map for 316LN were obtained. The results show that, with the increase of the deformation temperature and the decrease of the strain rate, the peak stress decreases, and the initial austenitic grain size has a little influence on the peak stress. The relative error between the peak stress values calculated using the constitutive equation and the values measured is less than 10%. Using the processing map, the best hot-working condition for 316LN in the range of experimental deformation parameters appears when T = 1200 °C and ε = 0.001 s -1. ©ASM International.

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