Research on Prediction of Microstructure Evolution during Mobile Steering Arm Forging Process by FEM

2011 ◽  
Vol 130-134 ◽  
pp. 2326-2329
Author(s):  
Wen Lin Chen ◽  
Li Jing Peng ◽  
Yong Ma ◽  
Shao Yang Wang ◽  
Zhi Jie Li ◽  
...  
Keyword(s):  
Grain Size ◽  
Microstructure Evolution ◽  
Hot Forging ◽  
Element Model ◽  
Middle Part ◽  
Close Match ◽  
Forging Process ◽  
Simulation Results ◽  
Hot Forging Process ◽  
The Finite Element Model

In order to get high quality forgings, it is significant to predict the microstructure evolution during hot forging process accurately. In this study, a simulation model is built by combining FEM with the dynamic recrystallization model of 42CrMo, and the finite element model is proved to be reliable by a serial of upsetting deformation experiment. Then the distributions of microstructure evolution are obtained on upsetting process. Upsetting is beneficial to refine the grain size and drawing can make the distribution of grain size homogeneous. By comparing the simulation results with experiments, the distributions of microstructure are a close match in the middle part of steering arm. The forgings formed by this process have a good microstructure and have high comprehensive mechanical properties.

FEM simulation of hot forging process to predict microstructure evolution

2013 ◽  
Author(s):  
Shi-Hong Zhang ◽  
Hai-Yan Zhang ◽  
Hong-Wu Song ◽  
Ming Cheng
Keyword(s):  
Microstructure Evolution ◽  
Hot Forging ◽  
Fem Simulation ◽  
Forging Process ◽  
Hot Forging Process

Numerical Simulation and Experimental Verification of Disc Cutter Rings in Die Forging Process

2021 ◽  
Vol 13 (1) ◽  
pp. 131-139
Author(s):  
Luhan Hao ◽  
Tao Wang ◽  
Kangping Fu ◽  
Zhengyang Zhao ◽  
Yun Chen ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Metal Flow ◽  
Element Model ◽  
Disc Cutter ◽  
Forging Process ◽  
Die Forging ◽  
Plastic Forming ◽  
Simulation Results ◽  
The Finite Element Model ◽  
Good Agreement

In order to study the forming law of the disc cutter ring in the independently researched die, the finite element model (FEM) of disc cutter ring for die forging has been established and the die forging process has been simulated by the plastic forming software. The metal flow field, temperature field, stress and strain field of the filling process were obtained by simulation. The exerted force of the die was also simulated and analyzed; thus, the die forging process was optimized. Based on the designed process parameters and simulation results, the experimental study on die forging forming of cutter ring was carried out. The comparison shows that the numerical simulation results are in good agreement with the experimental results, which proves that the die forging model of disc cutter ring in this paper is feasible.

Texture Development in Nd-Fe-V and Nd-Fe-B Alloys by Hot Forging in View of Improving Permanent Magnet Properties

2005 ◽  
Vol 105 ◽  
pp. 291-296
Author(s):  
Sophie Rivoirard ◽  
I. Popa ◽  
Daniel Chateigner ◽  
B. Ouladdiaf ◽  
Patricia de Rango ◽  
...  
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Neutron Diffraction ◽  
High Speed ◽  
Magnetic Phase ◽  
Hot Forging ◽  
Forging Process ◽  
Cast Alloys ◽  
Hot Forging Process ◽  
Anisotropic Magnet

A high speed hot forging process was applied to Nd-Fe-B and Nd-Fe-V as cast alloys in order to develop both the microstructure and the crystallographic texture appropriate for permanent anisotropic magnet properties. Neutron diffraction texture analyses are used to demonstrate the effect of the hot forging process on both kind of alloys. Microstructural changes are an important feature on forging in both cases. Coercivity is developed in the Nd-Fe-B alloy mainly from grain size reduction and disappearance of free iron. Stabilisation of the Nd(Fe,V)12 hard magnetic phase is achieved from the iron and Nd-rich microstructure of the starting Nd-Fe-V material. A comparison of the crystallographic textures of Nd2Fe14B and Nd(Fe,V)12 phases is done to account for the development of extrinsic magnetic anisotropy. In both cases, a nearly fibre texture is obtained in correlation with the symmetry of the deformation. However, the orientations are quite different in both alloys and the consequences on the magnetic properties are evidenced.

A Design in the Optimal Precision Forging Process about Transmission Shaft Flange Yoke

2010 ◽  
Vol 44-47 ◽  
pp. 2832-2836
Author(s):  
Ying Tong
Keyword(s):  
Complex Shape ◽  
Hot Forging ◽  
Element Model ◽  
Decision Making Process ◽  
Forming Process ◽  
Forging Process ◽  
Precision Forging ◽  
Transmission Shaft ◽  
Forming Defects ◽  
Hot Forging Process

The rigid-visco-plastic finite element model for the hot forging process of transmission shaft flange yoke was established, and two forging schemes of different male die shapes were simulated. As for the present forming process, the forming defects were indentified and analyzed. Based on the simulating results the decision-making process was obtained, and a preforming die and a final forming die with proper structures and longer life were designed. The transmission shaft flange yoke part produced by this process is excellent in dimension tolerance and mechanical property. This process is profitable reference for producing the similar type of forks with complex shape.

Study on the Formability of Magnesium Alloy Parts Under Hot Forging Process

2012 ◽  
Author(s):  
Su-Hai Hsiang ◽  
Yi-Cheng Hong ◽  
Huey-Lin Ho ◽  
Shiuh-Kuang Yang
Keyword(s):  
Magnesium Alloy ◽  
Process Parameters ◽  
Hot Forging ◽  
Experimental Conditions ◽  
Forging Process ◽  
Finite Element Software ◽  
Metallographic Observation ◽  
Deformation Behaviors ◽  
Simulation Results ◽  
Hot Forging Process

This study investigates the formability of AZ31 and AZ61 magnesium alloy for bicycle parts under hot forging process. Firstly, finite element software DEFORM is applied to simulate the deformation behaviors of magnesium alloys bicycle parts under different process parameters. The process parameters considered in the simulation are materials heating temperatures, lubricants and punch speeds. Changes in process parameters, the forging loads and the completeness of filling of material in die cavity are discussed. The optimal forging condition can be obtained from evaluation of the completeness of filling of material in die cavity, forging load and distribution of stress and strain. The experimental conditions are set according to the optimal simulation results. Hot forging experiments are carried out under the condition of heating range from 240°C to 350°C, different kind of lubricants, constant punch speeds 0.9mm/s to study the formability of magnesium alloy for bicycle parts. The experimental results are compare with the DEFORM simulation results. The obtained forging loads and completeness of filling are in good agreement with the simulation results. The validity of the simulation model established in this study can be confirmed. Finally, from the measured result of hardness and metallographic observation of forged part, the influence of forging temperatures on the strength and microstructures of magnesium alloy for bicycle parts under forging process can be evaluated.

A Design in the Optimal Precision Forging Process about Half Axle Gears

2011 ◽  
Vol 230-232 ◽  
pp. 274-277
Author(s):  
Ying Tong
Keyword(s):  
Gear Tooth ◽  
Hot Forging ◽  
Influence Factors ◽  
Element Model ◽  
Forming Process ◽  
Forging Process ◽  
Precision Forging ◽  
Die Structure ◽  
Hot Forging Process ◽  
Main Influence

The rigid-visco-plastic finite element model for the hot forging process of half axle gear was established, and the enclosed-die forging processes with different process parameters were simulated. As for the present forming process, the main influence factors on precision forming quality were identified and analyzed. The results show that proper die structure and cavity dimensions, suitable web thickness and position can improve material filling effect, which ensures gear tooth dimensions.

Simulation and Analysis on Microstructure Evolution of Large Generator Retaining Ring during Multi-Fire Forging

2010 ◽  
Vol 97-101 ◽  
pp. 176-181 ◽  
Author(s):  
Wen Wu He ◽  
Jian Sheng Liu ◽  
Hui Qin Chen ◽  
Hui Guang Guo
Keyword(s):  
Dynamic Recrystallization ◽  
Microstructure Evolution ◽  
Static Recrystallization ◽  
Hot Forging ◽  
Grain Structure ◽  
Forging Process ◽  
Retaining Ring ◽  
Microstructure Prediction ◽  
Hot Forging Process ◽  
Upsetting Test

In order to investigate microstructure evolution of Mn18Cr18N retaining ring during the multi-fire forging, a series of constitutive equations for dynamic recrystallization, static recrystallization, meta-dynamic recrystallization and grain growth were developed and implemented into a Deform FE simulator. The single-axial hot upsetting test has been performed to investigate the process of microstructure evolution and to show validity and effectiveness of the developed program. Then based on the modified boundary condition, hot forging process for 300MW retaining ring was put into effect. The results have displayed that the microstructure prediction tool was validated by comparing the simulated grain structure with that of the experiment and it could provide a reference to optimize forging processes in the production of retaining ring.

Study on Microstructure of a Gear Shaft during Hot Forging Process

2013 ◽  
Vol 712-715 ◽  
pp. 705-708
Author(s):  
Guang Chun Wang ◽  
Bin Hai Hao ◽  
Chao Feng ◽  
Tao Wang
Keyword(s):  
Grain Size ◽  
Hot Forging ◽  
Spur Gear ◽  
Forging Process ◽  
Size Refinement ◽  
Microstructure Simulation ◽  
Distribution Uniformity ◽  
Different Dimensions ◽  
Hot Forging Process ◽  
Good Agreement

The microstructure revolution of a spur gear shaft during hot forging was numerically simulated with FEM using Yada Model. The grain size distribution of the gear shaft after hot forged using initial billets with different dimensions was obtained through microstructure simulation and relative metallographic experiment show a good agreement with the simulation result. Effect laws of different forging parameters including the initial forging temperature and the punch speed, on grain size of the gear shaft after forged were given. A preforming process was proposed and the microstructure simulation shows that the preforming process can significantly improve the grain size refinement and distribution uniformity of the gear shaft by hot forging.

scholarly journals Microstructure evolution of 20Cr steel spider during cold forging using cellular automaton method

2018 ◽  
Vol 24 (1) ◽  
pp. 43
Author(s):  
Kun Xia Wei ◽  
Ling Niu ◽  
Wei Wei ◽  
Qing Bo Du ◽  
Igor V. Alexandrov ◽  
...  
Keyword(s):  
Grain Size ◽  
Microstructure Evolution ◽  
Effective Strain ◽  
Numerical Approach ◽  
Cold Forging ◽  
Forging Process ◽  
Microhardness Distribution ◽  
Ca Model ◽  
Simulation Results ◽  
Cellular Automaton Method

<p class="AMSmaintext"><span lang="EN-GB">The microstructure evolution of 20Cr steel spider in the cold forging process was simulated and analyzed by CA method, and verified by the experimental results. The CA simulation results show that the grain size becomes smaller with an increase of forging reduction. When the reduction is 60%, the grain size is the smallest. After that, the microstructure is inhomogeneous. At the same forging reduction, the microhardness at the root of the pin is higher than that at the head of the pin. It is well agreed with the distribution of the effective strain. The CA results agree well with the experimental data in terms of microstructure evolution and microhardness distribution, suggesting that the CA model is a reliable numerical approach for predicting microstructure evolution during cold forging for 20Cr steel spider.</span></p>

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