جستجوی مقالات مرتبط با کلیدواژه "پین روی دیسک" در نشریات گروه "مواد و متالورژی"

In this research, the wear behavior of commercial grade of WC-10wt%Co (H10F), WC-40vol%Co and WC-40vol%FeAl-B composites with different amount of boron from zero to 1000ppm was investigated by the pin on disk test method. The wear tests were done in ambient temperature, under load of 40 N and a distance of 100 m. Wear surfaces were examined by scanning electron microscopy (SEM). The results showed that among samples, the WC-40vol%FeAl composite without boron has the lowest wear resistance due to higher brittleness and lack of suitable continuity between iron-aluminide matrix and tungsten-carbide particles. This behavior leads to the separation of the reinforcer particles from matrix. In the presence of boron up to 500 ppm in iron-aluminide matrix, the wear behavior of these composites improved and the wear mechanism of these composites changed in to abrasive state. In ambient temperature the wear resistance of WC-40vol%FeAl-500ppmB composite was close to commercial WC-10wt%Co although has lower WC percent.

In the present study، the effects of iron and manganese on the tribological behavior of F332 alloy were investigated. Alloys with addition of 0. 7، 1. 2 and 1. 8wt% iron to the base alloy were prepared. The modification of the alloys was performed by proper additions of manganese. The pin-on-disk wear tests were carried out at room temperature under normal loads of 20، 30، 40، and 80 N، and sliding speed of 0. 5 m/s for sliding distance of 1000m. The results showed that the size and morphology of the iron-rich compounds greatly influenced the tribological behavior of the alloy. In the case of un-modified alloys، the alloy containing 0. 7wt% Fe، showed the best tribological and mechanical properties. Addition of higher amounts of Fe led to the formation of coarse، plate-like intermetallic compounds and، therefore، a considerable decrease in the wear resistance. The modification by manganese improved the tribological properties of the alloys and the highest wear resistance was obtained with the alloy containing 1. 8 wt% Fe.

In this paper, how to use the abrasive wheel in the pin on disk test was evaluated and developed for tribological studies of steels. Parameters such as type of pin (steel), type of abrasive wheel, normal load on pin, linear velocity of disk and sliding distance were studied. The results showed that initial hardness can not merely determine the wear resistance of a metal whereas it may be related to the surface hardness resulting from work hardening during abrasive. In addition, in the pin on disk method, using the abrasive wheel is a good choice for evaluation of tribological behavior of high wear resistance metals such as Hadfield steels while, it is not appropriate and proper for mild steel.

this paper, the wear behavior of Hadfield steel has been investigated by using the grinding wheel in the pin on disk test method. The main parameters of this test method such as normal load on pin, sliding speed and sliding distance have been studied. In this test, the main and interaction effects of parameters on the weight loss and its regression models have been obtained. The results show that chipping and surface cracking are two basic mechanisms of wear of the steel. In addition, the normal load is more effective than sliding speed in weight loss of the steel. In addition, the role of normal load on the weight loss increases with increasing the sliding distance, while the role of disk velocity fixes. The normal pressure (load) must also be lower than 0.5 MPa for low stress wear condition.