Quick Evaluation of Thermal Contact Resistance in Hot and Warm Forging.

Saiki, Hiroyuki; Zhan, Hong Zhi; Marumo, Yasuo; Ando, Hiroyuki

doi:10.1299/kikaic.61.3762

Cited by 3 publications

(3 citation statements)

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“…Compared with casting forming, the forging can eliminate the defects of the casting state caused by the metal in smelting process, and optimize the microstructure of the metal, and also can improve the mechanical properties of the parts by keeping the integrity of the metal flow line [7][8][9][10][11]. So, the important parts, which are high load and hard working condition, are generally made in the forging method.…”

Section: Introductionmentioning

confidence: 99%

Analysis on the Free Forging Process of the Heavy Rack for Ship Lift

Men¹,

Xin²,

Yue³

et al. 2017

AMM

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Heavy racks are the main load-bearing components and play more important position in great engineering equipments. Along with the requirement of the equipment efficiency promotion, the large-scale trend of rack is obvious. Among them, the rack for the Chinese Three Gorges ship lift total up to 5000mm. At present, the large rack mainly made by casting. Compared with the casting, the forging rack can greatly improve the mechanical properties and the service life. The aim of this work is feasibility analysis of free forging for large rack, as large T-shape section forging. Four possible forging schemes were simulated and compared by the finite element method, and the possible defects of all the schemes and their application scope were explored. Finally, it was proved that the free forging of heavy rack was realized by simple dies.

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Section: Introductionmentioning

confidence: 99%

Analysis on the Free Forging Process of the Heavy Rack for Ship Lift

Men¹,

Xin²,

Yue³

et al. 2017

AMM

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show abstract

“…In order to improve the die life, to increase the accuracy of the forged products and to reduce forging cost, the heat flux should be controlled. The most significant factor governing heat transfer is the contact condition between the workpiece and die [6]. The contact conditions can be varied by lubricants, tool surface finishing and tool surface modification and so on.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of contact conditions in hot forging of pure aluminum using ultrasonic examination

Saiki

Zhan

Marumo

et al. 2006

Journal of Materials Processing Technology

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“…These simulation techniques for die design have been introduced even into medium-and small-sized forging companies in Japan. For dies used in hot forging, die life is affected largely by thermal load; therefore, temperature, thermal deterioration and thermal softening of dies should be estimated [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Although significant changes in the temperature field of dies occur at the initial stage of forging or at the restart after a pause during forging, the temperature gradually achieves a steady thermal cycle after 20-30 shots.…”

Section: Introductionmentioning

confidence: 99%