Deformation and Temperature Distribution in Hot Forging

Saiki, Hiroshi; Shimizu, Soichi; Tsuru, E.; Matsuo, Takayasu

doi:10.1007/978-1-349-06546-2_48

Cited by 3 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

Effects of simulation conditions on evaluation of tool temperature in hot extrusion-forging

Minami

Marumo

Saiki

et al. 2006

Journal of Materials Processing Technology

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Effects of simulation conditions on evaluation of tool temperature in hot extrusion-forging

Minami

Marumo

Saiki

et al. 2006

Journal of Materials Processing Technology

View full text Add to dashboard Cite

Prediction of Softening of High Speed Steel with Surface Nitriding for Hot Forging

Minami

Marumo

Saiki

2007

MSF

View full text Add to dashboard Cite

A model hot forging test was carried out using tools of matrix high-speed steel. Dynamic thermal loads were applied to tools subjected to ion nitriding on the surface layer of the tool, and the conditions of deterioration and thermal softening were examined by measuring Vickers hardness in the vicinity of the tool surface after the thermal load test. In addition, static tempering softening tests were carried out, and thermal softening equations are obtained using tempering parameter on the basis of the obtained master tempering curves. When the thermal load was applied under the same conditions to nitrided and heat-treated tools, the degree of surface deterioration and thermal softening was small for nitrided tools. Equations of softening for two cases, i.e., specimen subjected only to heat treatment and specimen subjected to both heat treatment and nitriding, were expressed using tempering parameter.

show abstract

Effect of Surface Hard Layer and Forging Conditions on the Resistance of Plastic Deformation of Hot Forging Tools

Minami

Tabaru²,

Marumo³

et al. 2012

MSF

View full text Add to dashboard Cite

Tool damages including plastic deformation and wear are affected by forging load, thermal load and frictional slide applied to tool surface. Plastic deformation of forging tools proceeds in the tool corer owing to elevated temperature, high contact pressure and severe frictional slide. Hard layers on the tool surface increase plastic deformation resistance and thermal resistance. The optimal design of hard layer structure reduces the tool damage and improves tool life. Temperature and equivalent strain of forging tools are influenced by friction shear factor, contact thermal conductance and contact time between the tool and the workpiece. At the friction shear factor of less than 0.4, equivalent strain of the tool is reduced. At the friction shear factor of approximately 0.4 or greater, equivalent strain increases sharply and concentrates in the vicinity of the surface hard layer. This tendency becomes more significant when the contact time between the tool and the workpiece increases. Equivalent strain is reduced by low workpiece temperature.

show abstract

Deformation and Temperature Distribution in Hot Forging

Cited by 3 publications

References 6 publications

Effects of simulation conditions on evaluation of tool temperature in hot extrusion-forging

Effects of simulation conditions on evaluation of tool temperature in hot extrusion-forging

Prediction of Softening of High Speed Steel with Surface Nitriding for Hot Forging

Effect of Surface Hard Layer and Forging Conditions on the Resistance of Plastic Deformation of Hot Forging Tools

Contact Info

Product

Resources

About