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.

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

Taguchi Method Approach for Recyling Chip Waste from Machining Aluminum (AA6061) Using Hot Press Forging Process

2013 ◽  
Vol 845 ◽  
pp. 637-641 ◽  
Author(s):  
Mohamad Syahmi Shahrom ◽  
Ahmad Razlan Yusoff ◽  
Mohd Amri Lajis
Keyword(s):  
Taguchi Method ◽  
High Speed ◽  
Operating Temperature ◽  
Hot Forging ◽  
Cutting Speed ◽  
Grain Structure ◽  
Depth Of Cut ◽  
Operating Pressure ◽  
Forging Process ◽  
Hot Forging Process

This paper investigates the recycling waste aluminum alloy 6061 from high speed machine (HSM) machine using hot forging process. Hot forging process able to recover the grain structure of material by controlling certain pressure and temperature. The experiments conducted by Taguchi method design. Three factors selected are chip size, operating temperature and operating pressure with three levels for each factor. Both factors for operating temperature and pressure direct control from hot forging machine. The chip sizes are prepared from HSM machine using by three machine parameters, which are constant cutting speed and manipulate three levels for each parameter for feed rate and depth of cut. The final result between reference and experiment specimen shows the close gap in the tensile test. The main effect, signal noise ratio and analysis of variance were employed to investigate the results and the optimum parameters for hot forging process can be established. It can be concluded that the hot forging process able to recycle waste (chip) aluminum compared to the current recycling aluminum process.

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.

Research on the Intramode Canning Hot Forging Process for Mn18Cr18N Retaining Ring

2008 ◽  
Vol 575-578 ◽  
pp. 438-442 ◽  
Author(s):  
Ji Hong Tian ◽  
Jian Sheng Liu ◽  
Hui Guang Guo ◽  
Hui Qin Chen
Keyword(s):  
Numerical Simulation ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Hot Forging ◽  
Simulation Method ◽  
Hot Deformation Behavior ◽  
Forging Process ◽  
New Process ◽  
Retaining Ring ◽  
Hot Forging Process

In order to solve the problems such as cracking, uneven property and poor forming controllability in the traditional hot forging of Mn18Cr18N retaining ring, a new intramode canning hot forging process was developed. In this paper, the hot deformation behavior of the material was invstigated by thermo-mechanical molding tests. Based on the results of the tests, the new process was studied in detail and the main parameters were optimized by means of numerical simulation method. The experiment shows that the process was reasonable for forging Mn18Cr18N retaining ring.

Numerical Simulation of Microstructure Evolution of Hot Forging

2011 ◽  
Vol 189-193 ◽  
pp. 2605-2608
Author(s):  
Zhi Hao Ma ◽  
Xiao Lei Dong ◽  
Bing Yun
Keyword(s):  
Dynamic Recrystallization ◽  
Volume Fraction ◽  
Hot Forging ◽  
Mechanical Analysis ◽  
Calculation Model ◽  
Model Coupling ◽  
Analysis Method ◽  
Forging Process ◽  
Coupling Factors ◽  
Hot Forging Process

The paper focuses on the research of using the coupled thermo mechanical analysis method of rigid viscoplastic finite element and the evolution of dynamic recrystallization to establish the calculation model coupling factors of deformation, heat conduction, dynamic recrystallization in the DEFORM, and on the hot-forging simulation of AISI4140. Through the simulation, it makes a valid prediction of dynamic recrystallization volume fraction and the grain size of recrystallized during the metal hot-forging process.

Study of the applicability of 22MnB5 sheet metal as protective masks to improve tool life in hot forging process

2020 ◽  
Vol 107 (1-2) ◽  
pp. 39-47
Author(s):  
Luana De Lucca de Costa ◽  
Alberto Moreira Guerreiro Brito ◽  
André Rosiak ◽  
Lirio Schaeffer
Keyword(s):  
Sheet Metal ◽  
Tool Life ◽  
Hot Forging ◽  
Forging Process ◽  
Hot Forging Process

scholarly journals Influence of Anvil Shape of Surface Crack Generation in Large Hot Forging Process

2014 ◽  
Vol 81 ◽  
pp. 480-485 ◽  
Author(s):  
Takefumi Arikawa ◽  
Daisuke Yamabe ◽  
Hideki Kakimoto
Keyword(s):  
Surface Crack ◽  
Hot Forging ◽  
Forging Process ◽  
Crack Generation ◽  
Hot Forging Process
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