Erratum to “Die life considering the deviation of the preheating billet temperature in hot forging process” [Finite Elements Anal. Design 41 (2005) 1255–1269]

Kim, D. H.; Kim, B. M.; Kang, Chung Gil

doi:10.1016/j.finel.2005.09.001

Cited by 3 publications

(4 citation statements)

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“…When the die hardness is decline, the ability of antiwear is drop down. During hot forging process, the die temperature is affected by several factors, such as initial temperature of dies and billet, the contact time and pressure etc [2][3].…”

Section: Discussionmentioning

confidence: 99%

Study on the Rules and Effects of Wear on Die Service Life in Steel Synchronizer Gear Ring Forging Process

Zhao

Luo

2011

AMR

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The die accuracy and die service life reduce due to die wear during precision forming processes of steel synchronizer gear ring. The most serious part of wear is the middle between two tooth shapes. The rules of the wear and initial die hardness and frictional coefficient are analyzed based on numerical simulation. It shows that the higher of the initial die hardness, the better antiwear and good lubrication is benefit to reduce wear and prolong the die service life. The effect of the temperature on die life is reflected through hardness. The relationship of die hardness and die temperature, forming time is deduced. The higher of the die temperature and the longer of the forging time, the more serious of die wear. To prolong the die life and improve the quality of forgings, the synthetic forming technology is adopted and the ejection way and control system of the Plate Friction Press are improved. Experiment verification shows that the die service life has been prolonged.

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Section: Discussionmentioning

confidence: 99%

Study on the Rules and Effects of Wear on Die Service Life in Steel Synchronizer Gear Ring Forging Process

Zhao

Luo

2011

AMR

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“…Schaefer predicted the tool wear with consideration of the changes of the hardness in the tool surface-layer [9]. Taking the deviation of the temperatures in preheated billets into consideration, Kim and Kang used a finite element method to study wear and plastic deformations of the dies [10]. Abachi et al analysed the die wear in hot forging by a finite volume method, based on which a value of wear coefficient was recommended [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of post-welding heat treatment on wear resistance of cast-steel die with surfacing layer

Tang

et al. 2015

Manufacturing Rev.

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-The wear resistance capability of die surfacing layer under different Post-Welding Heat Treatments (PWHT) was analysed by Finite Element (FE) simulation and experiments. Taking hot forging process of a crankshaft as an example, a wear model of the hot forging die coated with surfacing layer was established using FE software DEFORM-3D. The simulation results indicated that the wear resistance capability of the die surfacing layer is optimal when tempering temperature and holding time are 550°C and 4 h respectively. To verify the wear computational results, 16 groups of PWHT orthogonal wear tests were performed at a temperature of 400°C, which is a similar temperature to that occurs in an actual hot forging die. The wear-test result showed a good agreement with the FE simulation. SEM observation of the wear debris on 16 specimens showed that oxidative wear is dominant when the temperature was in 400°C. Furthermore, when tempering temperature and holding time were 550°C and 4 h respectively, the carbide alloy dispersively distributes in the metallographic structure, which helps to improve the wear resistance of the surfacing layer.

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“…This heat, imparted by plastic deformation and friction between the die and the billet, causes a complex and changing temperature field. 8 Therefore, it is very important to predict the high temperature behaviour of die materials during the forging processes. Kashani et al investigated the room and high temperature wear behaviours of weld overlay coatings on hot forging dies, 9 as was also reported in the investigation of erosive abrasive wear resistance by Ramachandran et al, 10 but very few investigations of shocking and tempering resistance of hardfacing materials have been reported so far.…”

Section: Introductionmentioning

confidence: 99%

“…The process of metal forming is always accompanied by heat generation. This heat, imparted by plastic deformation and friction between the die and the billet, causes a complex and changing temperature field 8. Therefore, it is very important to predict the high temperature behaviour of die materials during the forging processes.…”

Section: Introductionmentioning

confidence: 99%

Comparative behaviour of cobalt and iron base hardfacing alloys

Liu

Wei

et al. 2012

Surface Engineering

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This paper aims to compare the behaviour of cobalt and iron base hardfacing alloys on hot forging dies under temper, shock and wear. Tempering resistance, shocking behaviour and wear resistance were investigated using a tubular furnace, press and pin on disc tribometer respectively. The results showed that the thermal stability of commercial iron base hardfacing alloy (named RMD248) is good below 550uC but poor in the case of higher temperature, whereas the cobalt base hardfacing alloy presents superior tempering resistance. The cobalt base hardfacing alloy possesses excellent shock hardening properties at all the experimental temperatures, but RMD248 does not, especially at high temperature (600uC). Compared with the hardfacing layer produced by RMD248, the cobalt base hardfacing layer produces high wear resistance at 600uC and high temperature oxidation resistance at 600uC for 100 h.

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Erratum to “Die life considering the deviation of the preheating billet temperature in hot forging process” [Finite Elements Anal. Design 41 (2005) 1255–1269]

Cited by 3 publications

References 0 publications

Study on the Rules and Effects of Wear on Die Service Life in Steel Synchronizer Gear Ring Forging Process

Study on the Rules and Effects of Wear on Die Service Life in Steel Synchronizer Gear Ring Forging Process

Effect of post-welding heat treatment on wear resistance of cast-steel die with surfacing layer

Comparative behaviour of cobalt and iron base hardfacing alloys

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