j Influence of hardness on the wear resistance of 17-4 PH stainless steel evaluated by the pin-on-disc testing (original) (raw)
Related papers
2013
In the present research, friction coefficients of stainless steel 304 (SS 304) sliding against different pin materials are investigated and compared. In order to do so, a pin on disc apparatus is designed and fabricated. Experiments are carried out when different types of pin such as aluminum, gun metal, copper and brass slide on SS 304 disc. Experiments are conducted at normal load 10, 15 and 20 N, sliding velocity 1, 1.5 and 2 m/s and relative humidity 70%. Variations of friction coefficient with the duration of rubbing at different normal load and sliding velocity are investigated. Results show that friction coefficient varies with duration of rubbing, normal load and sliding velocity. In general, friction coefficient increases for a certain duration of rubbing and after that it remains constant for the rest of the experimental time. The obtained results reveal that friction coefficient decreases with the increase in normal load for all the tested pairs. On the other hand, it is also found that friction coefficient increases with the increase in sliding velocity. Moreover, wear rate increases with the increase in normal load and sliding velocity for all sliding pairs. The magnitudes of friction coefficient are different for different material pairs depending on normal load and sliding velocity.
Tribological Wear Behavior of AISI 630 (17-4 PH) Stainless Steel Hardened by Precipitation Hardening
American Journal of Materials Science, 2016
The aim of this present work is to investigate the dry sliding wear behavior of 17-4 PH stainless steel or AISI 630 hardened by precipitation hardening. The sliding wear tests were conducted with the use of a pin-on-disc tribometer by considering three factors viz., normal load (20N, 40N and 60N), sliding distances (400m, 600m and 800 m) and sliding velocity (3, 5 and 7 m/s). The analysis of wear volume loss and specific wear rate has been defined by the Taguchi methodology and analysis of variance using statistical software MINITAB 15. Signal to noise ratio shows that, among the factors the load is the most significant factor that affects wear volume loss and specific wear rate.
Some studies of wear of an Al-22wt.%Si alloy under dry sliding conditions
Wear, 1982
Aluminium-based alloys, which are considered useful for applications in which the strength-to-weight ratio is important, are also being studied for substitution as wear-resistant alloys [l] for cast iron components. Al-Si alloys have been used for tribological applications under conditions of both dry and lubricated contact. The wear behaviour of hypereutectic Al-Si alloys has been studied [2 -41 under various test conditions. It was observed [l] that, among several materials studied, a hypereutectic Al-Si alloy exhibited the lowest wear rate. Thus the hypereutectic Al-Si alloys have gained a definite status as wear-resistant materials. However, there have been conflicting
SLIDING WEAR BEHAVIOUR OF AISI 304 STAINLESS STEEL WITH CERAMIC COATING
n this investigation, friction and sliding wear behaviour of AISI 304 stainless steel with HVOF coating was studied. This approach explains the comparative study of steel and ceramics; and also to evaluate the frictional properties of coatings also. The austenitic stainless steels are good in mechanical properties. To enhance the tribological properties and surface hardness of the stainless steel the alumina – titania (60 – 40 wt. %) powder was deposited as coating using High Velocity Oxy-Fuel (HVOF) method.The experiments were carried out by adopting pin on disc sliding wear test method as per ASTM guidelines. The AISI 304 stainless steel was selected as the pin and the disc was coated with the ceramic coating. The parameters used to evaluate the friction and wear behaviour are such as sliding velocity, normal load and sliding distance were designed and studied as per ASTM G99 standard. From the experiment mass loss of the sliding pin was measured to calculate the wear rate of the material under the specified conditions. The variations in co – efficient of friction (CoF) obtained for steel and ceramic coating were also discussed with respect to the sliding parameters. The surface of the pin after wear was observed with the help of microscope to study the wear track and wear mechanism.
Friction Coefficient and Wear Rate of Different Materials Sliding Against Stainless Steel
International Journal of Surface Engineering and Interdisciplinary Materials Science, 2013
This paper examines the relation between friction/wear and different types of steel materials under different normal loads and sliding velocities and to explore the possibility of adding controlled normal load and sliding velocity to a mechanical process. In order to do so, a pin on disc apparatus is designed and fabricated. Experiments are carried out when different types of disc materials such as stainless steel 304 (SS 304), stainless steel 316 (SS 316) and mild steel slide against stainless steel 304 (SS 304) pin. Variations of friction coefficient with the duration of rubbing at different normal loads and sliding velocities are investigated. Results show that friction coefficient varies with duration of rubbing, normal load and sliding velocity. In general, friction coefficient increases for a certain duration of rubbing and after that it remains constant for the rest of the experimental time. The obtained results reveal that friction coefficient decreases with the increase in ...
Study of Wear Characteristics of AISI H11 Steel
In metal casting and forming industries, the wear of dies continues to be a great concern to the automotive industry due to increasing die maintenance cost and scrap rate. The demand to reduce the use of lubricants and increase tool life in pressure die casting has resulted in increased research on the sliding contact between the tool and the metal. Hence it has been recognized that the deforming conditions, such as - normal load, sliding speed, sliding time etc. affect the performance of the operation to a greater extent [3]. The objective of the present work is to assess the effect of the sliding parameters on the wear of AISI H11 steel. It is used as the die material in many hot working processes and other press working industries. The experiments have been conducted on PIN ON DISK (TR-20LE-PHM-400). The wear experiments were performed on pins made of AISI H11 steel and disks made of Aluminium 6082. Design of experiment with three independent factors (normal load, sliding speed, sliding time) has been used to develop relationships for predicting weight loss of pins caused by rubbing action[2]. The weight loss of pins has been measured within 10-4 g precision.
This task examines on acceptance induction and flame hardening processes so as to enhance the wear conduct of the material. The hardness of the material is expanded up to 200% by this procedure. Induction hardening process were done to 3 unique examples-a 1 minute, 2 minutes, and 3 minutes and named as IH1, IH2, and IH3 separately. Flame hardening process were completed to 3 distinct examples – 5 minutes, 10 minutes and 15 minutes and named as FH1, FH2, and FH3. The examples are to be amplified by metallographic test, for example, scanning electron microscope. The untreated example is utilized to contrast and the treated example. The best example is picked which decides the life of material and enhances the better wear protection. The hardness of untreated material and treated material were analyzed.
Influence of residual stress on the sliding wear of AISI 4340 steel
Matéria (Rio de Janeiro)
Mechanical components and structures wear out as a result of friction between surfaces in relative motion. Residual stresses play an important role for the tribological performance of components since compressive residual stresses yield positive effects on wear resistance. However, the real effect of residual stresses on the tribological performance of surfaces is not entirely clear. The objective of this work is to evaluate the residual stress behavior during a pin-on-disk wear test of quenched and tempered AISI 4340 disk specimens against a counter-body of steel AISI E 52100. Tests were performed in shot peened and non-shot peened specimens in six steps and residual stresses were evaluated after each one by X-ray diffraction technique using sin 2 method. The results shown that wear rate of the shot peened specimens was approximately fifty percent lower. Shot peening induced compressive residual stresses contributed to this effect even though they were modified during the pin-on-disk test.
Surface and Sliding Wear Behaviour of Different Coatings and Steels
Ingeniería, investigación y tecnología, 2012
In this work, the sliding wear behaviour of the coatings TiN, CrN and WC/C applied on steel substrates was studied using a reciprocating wear test machine. All tests were carried out in dry conditions, at room temperature (20-23°C and 45%−50% relative humidity). The average sliding velocity was 0.08 m/s and an amplitude of 2 mm was used. The applied loads were 11.76 N (Po = 1.74 GPa) and 7.84 N (Po = 1.52 GPa). Optical microscopy was used to observe the characteristics of wear scars and spalls and possible causes of their formation. The variation of the friction coeffi cient against the number of cycles was obtained. This was used to determine more precisely the time (number of cycles) where the coating presented the fi rst signs of wear, in addition Energy Dispersive X-ray analysis (EDS) was performed, as well as Scanning Electron Microscopy (SEM) and hardness tests on the wear traces, which reinforced the previous observations. Thus it was possible to know the wear life of diff erent coatings and possible causes of variation. Increasing the load was an important factor in the variation of wear life results. But it is also important to consider other factors such as surface roughness and thickness of coatings. keywords • coating • wear • substrate • SEM Surface and Sliding Wear Behaviour of Different Coatings and Steels