To apply the duplex type low-carbon medium-manganese steel to hot/warm-forging and -stamping products, influence of cooling process routes immediately after intercritical annealing such as air-cooling (AC) isothermal transformation (IT) processes on impact toughness 0.2%C-1.5%Si-5%Mn (in mass %) medium-Mn (D-MMn) was investigated. Moreover microstructural tensile properties were also The AC inc...

Hot forging is a common manufacturing process for the production of large quantities of engineering components. Residual stresses are developed in forged components as a result of various aspects of the manufacturing process, including subsequent cooling, and heat treatment. Residual stresses can significantly affect the deformation and fatigue failure of materials. Hot forged EN15R steel bars ...

The paper presents an investigation on the effect of process variables and material condition on forgeability of magnesium wrought alloys of Mg-Al-Zn group, AZ31, AZ61 and AZ91. The experimental work includes studies of forging capabilities of the alloys in closed-die forging at hot and warm-working temperatures. Forging tests are performed for material both in as-cast and asworked condition, f...

We have been developing a process design CAE system to predict die wear life in the process design stage for the hot forging of steel. Our goal is to reduce production costs by shortening the development period, while maximizing the life of the die. In our system, we use an expression that defines the relationship between die wear, die strength, and friction factors, such as die pressure, slidi...

Abstract The hot deformation behavior of a novel TNM-RE alloy (RE = Y, La, Ce) was studied using simulation machine (Gleeble-3800), and microstructural evolution also characterized. Finally, 3D forging carried out on isothermal equipment. It is shown that the as-cast lamellar colony size about 20 ∼ 30 μ m, which refined by formation rare Earth oxides borides at grain boundaries inhibiting growt...

A majority of high-strength constructional elements of titanium alloys are manufactured by hot plastic working methods, chiefly by open die forging or die forging. Most often, β α + two-phase titanium alloys are used, which are characterized by high relative strength, good hightemperature creep resistance (up to 450°C), high fatigue strength under corrosive conditions, corrosion resistance in m...

Within the net-shape and near-net shape technology hot flashless precision forging leads to high forging accuracy of the workpiece with regard to dimensional and surface finish tolerances. The main advantages are shortened production cycles by eliminating machining operations and the saving on raw material lost during machining. By producing ready-to-mount forgings high economical and ecologica...