Wear analysis of hot forging dies

Abachi, Siamak; Akkök, Metin; Gökler, Mustafa İlhan

doi:10.1016/j.triboint.2009.07.011

Cited by 55 publications

(29 citation statements)

References 15 publications

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“…W/K of the TiCN composite was lowest in the three die materials. Since it is generally known that the value of K is low in use of die material with high hardness [14][15][16][17], the TiCN composite is expected to exhibit high wear resistance characteristic. …”

Section: Die Wearmentioning

confidence: 99%

Effects of TiCN Composite Die with Low Thermal Conductivity on Hot Forging Performances

Matsumoto¹,

Itamochi²,

Mori³

2016

JMEA

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Titanium carbonitride based composite (TiCN-metallic binder) was developed as die material for replacement of cemented tungsten carbide. The effects of thermal conductivity characteristic of the TiCN composite on hot forging performances were investigated using a servo press with ram motion control. Three types of the die materials; (a) tool steel for hot working, (b) cemented tungsten carbide with high thermal conductivity and (c) TiCN composite with low thermal conductivity were compared. In hot upsetting of a chrome steel workpiece, the TiCN composite die was confirmed to reduce the forging load by approximately 20% at slow forging speed. This is because the die with low thermal conductivity could prevent the workpiece from rapid cooling induced by heat transfer at the die-workpiece interface. In addition, the material flow of the workpiece to a die cavity was improved. Furthermore, the wear depth/wear coefficient of the TiCN composite was lower than that of the tool steel and the cemented tungsten carbide in the numerical analysis of wear due to the combination of low thermal conductivity and high hardness.

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Section: Die Wearmentioning

confidence: 99%

Effects of TiCN Composite Die with Low Thermal Conductivity on Hot Forging Performances

Matsumoto¹,

Itamochi²,

Mori³

2016

JMEA

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“…Die wear is an effect of many physical phenomena, such as friction (abrasive wear), material sticking (adhesive wear), thermal and mechanical fatigue, oxidation of working layers of material, etc. [3,2,4]. These mechanisms depend on many factors, both related to process and material.…”

Section: Introductionmentioning

confidence: 99%

Computer system for identification of tool wear model in hot forging

et al. 2016

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Abstract. The aim of the research was to create a methodology that will enable effective and reliable prediction of the tool wear. The idea of the hybrid model, which accounts for various mechanisms of tool material deterioration, is proposed in the paper. The mechanisms, which were considered, include abrasive wear, adhesive wear, thermal fatigue, mechanical fatigue, oxidation and plastic deformation. Individual models of various complexity were used for separate phenomena and strategy of combination of these models in one hybrid system was developed to account for the synergy of various mechanisms. The complex hybrid model was built on the basis of these individual models for various wear mechanisms. The individual models expanded from phenomenological ones for abrasive wear to multiscale methods for modelling micro cracks initiation and propagation utilizing virtual representations of granular microstructures. The latter have been intensively developed recently and they form potentially a powerful tool that allows modelling of thermal and mechanical fatigue, accounting explicitly for the tool material microstructure.

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“…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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Wear analysis of hot forging dies

Cited by 55 publications

References 15 publications

Effects of TiCN Composite Die with Low Thermal Conductivity on Hot Forging Performances

Effects of TiCN Composite Die with Low Thermal Conductivity on Hot Forging Performances

Computer system for identification of tool wear model in hot forging

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

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