Cold- and warm-forging press developments and applications

Working conditions in engineering operations are often characterized by a complex of negative factors, which at every moment load the human body during the active work with various intensity. Determination of the intensity of the workload is important for creation of workplace comfort, which is closely connected to workers’ contentment. The contribution presents a description and application of a mathematical model for determination of the workers´ complex loading at forging press workplace. It's a new and human way of evaluating work comfort, which can take into account the summary effect of all the negative factors at the workplace.

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Warm-Forging Characteristics and Microstructural Response of Medium-Carbon High-Strength Steels for High-Duty Components

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.611-612.167 ◽

2014 ◽

Vol 611-612 ◽

pp. 167-172 ◽

Cited By ~ 2

Author(s):

Piotr Skubisz ◽

Łukasz Lisiecki

Keyword(s):

High Strain Rate ◽

Strain Rate ◽

Microstructure Evolution ◽

High Strain ◽

Deformation Behaviour ◽

Metal Flow ◽

High Strength Steels ◽

High Strength ◽

Medium Carbon ◽

Warm Forging

Paper presents deformation behaviour and microstructural response of selected medium-carbon high-strength steels commonly used for high-duty components deformed under high-strain-rate and warm work temperature range. The investigation of material behaviour is oriented at analysis of hot and warm workability of material and microstructure evolution resultant from deformation mechanisms, strain induced recrystallization and hardening at temperatures of lower forging regime and high strain rate deformation. The effect of these factors on microstructure after forging and subsequent direct-cooling was studied. Metallographic work aided with numerical methods of simulation of the metal flow and microstructure evolution during forging were used to correlate thermo-mechanical parameters observed with microstructure and mechanical properties after forging and cooling.

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Wear in Hot and Warm Forging: Design and Validation of an New Laboratory Test

CIRP Annals ◽

10.1016/s0007-8506(07)63057-1 ◽

1996 ◽

Vol 45 (1) ◽

pp. 249-253 ◽

Cited By ~ 5

Author(s):

Paolo F. Bariani ◽

Guido A. Berti ◽

Luciano D'Angelo ◽

Roberto Guggia

Keyword(s):

Laboratory Test ◽

Warm Forging

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Mechanical Behavior of Twinning Induced Plasticity Steel Processed by Warm Forging and Annealing

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.385.21 ◽

2018 ◽

Vol 385 ◽

pp. 21-26

Author(s):

Wen Wang ◽

Dan Wang ◽

Fu Sheng Han

Keyword(s):

Twip Steel ◽

Tensile Deformation ◽

Initial Density ◽

High Yield ◽

High Yield Strength ◽

Density Of Dislocations ◽

Yield Point Phenomenon ◽

Increased Strength ◽

Warm Forging ◽

Very High

The present study shows that warmly forged and low-temperature annealed twinning induced plasticity (TWIP) steel exhibited very high dislocation density and apparent yield-point phenomenon in addition to very high yield strength. The initial density of dislocations significantly affected the evolution of dislocations during the subsequent tensile deformation. Original high dense dislocations prompted the rapid increase of dislocations, and intensified the complexity of dislocation configurations. All these effects made the twinning deformation weakened but the dislocation deformation enhanced, leading to increased strength but decreased plasticity.

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