Abstract
Preliminary investigation of forged brackets produced of S355 J2+(N) steel is presented in this research work. Performed investigation was intended to approve predicted production technology. First, all stages in the complex production process chain were defined, starting from the construction of the forging die, heating of the pieces of raw material, preforming, forging of the piece, frying and stress relieving. Confirmation of the proposed production parameters was performed with an application of appropriate computer program DEFORM F3 Ver10. After performing the forging process, mechanical and microstructural investigations of the produced forging parts were done. These investigations confirmed that preliminary proposed forging process meets all requirements concerning quality of the forged brackets. It means that undesirable forging defects were not detected and mechanical properties (tensile strength and hardness) of the forgings are in accordance with standard requirements.
Highlights
Hot forging is defined as working of a metal above its recrystallization temperature
Preliminary investigation of forged brackets produced of S355 J2+(N) steel is presented in this research work
After performing the forging process, mechanical and microstructural investigations of the produced forging parts were done. These investigations confirmed that preliminary proposed forging process meets all requirements concerning quality of the forged brackets. It means that undesirable forging defects were not detected and mechanical properties of the forgings are in accordance with standard requirements
Summary
FCC austenite is deformed instead of the strong BCC ferrite which the structure is consist of at lower temperatures. The part design and process plan make the basis for calculating of the economic efficiency in the project planning stage This means that the decision to using a forging process has been reasonable and valid. Forging process is implemented in the production of wide range of railway parts like: railway wheels, axle’s crankshafts, large and small connecting rods, disk brakes, chassis components, connection couplings, sleeper screws and many others. These parts must fulfill rigorous requirements under exploitation conditions. Mechanical and microstructural testing of the produced forging parts confirmed that obtained product completely satisfy quality requirements [7,8]
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