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by KIM et al [15], the CrSiN coating deposited on the AISI 4340 cylinder barrel improves friction behavior under tap water up to 1600 r/min without delamination or surface cracking of the coating... by scratch tester (CSM Revetest) with a conical diamond tip of 0.2 mm radius and 120° taper angle. The measurements parameters were as follows: the table speed of 6mm/min, loading rate of 118N/min......
derivation Due to symmetry, the calculation process involves only one half of the roll system along the roll barrel. Fig.1 represents the slit beam model where jacks between the upper and lower work rolls... and work roll neck, respectively; Db and Dw are diameters of backup and work roll barrel, respectively; η and β are the distances from original to the jth and the ith elements, respectively; p(j......
alloy could be sheared off by strong shearing forces and hence the spherical primary phase was successfully obtained by means of mechanical rotational barrel (MRB) system. In this work... barrel (MRB) system. The barrel was made of stainless steel, with an inclination angle of 45°, and 500 mm in length and 150 mm in diameter. The alloy melt flow inside the barrel was characterized by high......
and the electrical characteristics were measured. FE-SEM was used to measure the dimensions of the micro-holes. The taper angle was also measured to obtain the dimensions of the holes accurately. The taper angle is shown in Fig.3. Fig.3 Measurement of taper angle(θ) (a) and picture of electrode using FE-SEM (b) 3 Results and discussion 3.1 Electrical characteristics Fig.4 shows the discharge......
investigated at various forming temperatures by using ductile fracture criterion. And the numerical simulations of viscous pressure forming conical taper part at warm temperature were carried out...-isothermal forming owe to the temperature gradient in sheet blank as the initial temperature of viscous medium is lower than that of sheet blank for non-isothermal forming[16]. 3 VPF of conical taper......
apparatus as shown in Fig.1. The diameter and depth of the column selected by this experiment were 159 and 1 300 mm, respectively. The volume of raised barrel and collective barrel was 30 L. This apparatus consisted of circulation of heated water, aerated system, circulation of solution, datum collecting system, controlling cabinet, raised barrel, column and collective barrel. Besides the multi......
, Al2O3/CNT composite is not easy to be machined by EDM process. Thus, the high electrical energy for making micro-holes on the composite resulted in the poor surface quality. The taper angle was measured to evaluate the dimensional accuracy of the micro-holes[10]. Fig.4 shows the taper angle of the micro-holes under the different machining conditions of the micro-EDM process. In the case......
the axial pressure PZ were installed in different radius locations at the bottom of cylinder along the R-axis direction. In the experiment, the charging barrel was filled with a certain volume of NMG...=80 mm, the die fillet RD=5 mm, and the half-cone angle (an angle between generatrix and axis) of 15°, which belong to deep taper, as shown in Fig. 12. The AA7075-T6 sheet, with the initial thickness......
that of the extrusion barrel, the workpiece was in the upsetting process during the first 25 steps of extrusion, and the extrusion rod was in the process of accelerating the metal material extrusion die orifice...: Proceedings, 2015, 2(10): 4812-4819. [20] JENISTA D R. Extrusion billet taper quenching system [P]. US patent: US 5325694A, 1994-07-05. [21] LI Bo, ZHANG Nai-lu, ZHANG Ru. Simulated isothermal extrusion......
shearing leading to grain refinement. Using taper cylindrical and various polygonal pins, IMAM et al [14] welded 6063 aluminum alloys and identified that welds with square pin shaped tool produced... and their combined effect with various polygonal pins such as taper cylindrical, triangular, square, pentagon and hexagonal pins were studied. The investigation was extended to study pin geometry effects......
