the hot compression tests were carried on x45crniw189 valve steel (x45) in the temperature rangeof 1000– 1200 °c and the strain rate range of 0.004 – 0.5 s-1 in order to study the high temperaturesoftening behavior of this steel. for the exact prediction of flow stress, the effective stress-effectivestrain curves were obtained from experiments under various conditions. on the basis of experimen...

Steel containing 0.03% carbon, 1.35% copper and 0.84% nickel had yield strength in the 540-625 MPa (78-90 Ksi) range depending on thickness, ultimate tensile strength in the 625-690 MPa (90100 Ksi) range, and 25-30% elongation when air cooled after hot rolling. No brittle heat-affected zone was formed during manual or automatic submerged arc welding without pre-heating or postheating. The fract...

Hot–press forming steels are formed in a fully austenitic state followed by die– quenching in order to generate martensite and achieve a strong steel. The ductility however, tends to be limited. We explore in this work a novel steel design in which the forming operation is in the two–phase austenite and ferrite field, so that the quenching results in a dual–phase ferrite and martensite microstr...

Abstract. The variation of tool performance and nonuniform process parameters in metal forming are some the factors that complicate life modeling analysis such processes. In this work, a brief discussion about machine learning analyzing extrusion as well modeling, an implemented work using to predict failure modes for H13 Steel die used 6063 Aluminum hot is presented. conducted on set steel die...

In this study, machinability tests on Assab Korkmaz Orvar Supreme (1.2344 ESR, AISI H13 Premium) hot work tool steel widely used in industry were carried out. Machinability tests were carried out through single point turning method at eight different cutting speeds (120, 160, 200, 240, 280, 320, 360 ve 400 m/dak), four different feed rates (0,05; 0,10; 0,15 and 0,20 mm/min) and 1 mm depth of cu...

It is desirable to improve tool steel wear resistance produce pieces with precise dimensions and increase the lifetime of tools. The aim this work was modify surface 1.2344 (X40CrMoV5-1) hot properties. Surface modification achieved in three steps: first, hardening applied, followed by plasma nitridation and, finally, physical vapor deposition (PVD) employed a TiN/AlTiN multilayer coating. micr...