Interface Property and Two-Body Wear Behavior of High-Cr WCI Matrix Composite Reinforced with CC Particles

2010 ◽  
Vol 457 ◽  
pp. 273-278 ◽  
Author(s):  
Ye Fei Li ◽  
Yi Min Gao ◽  
Jian Jun Zhang ◽  
Jing Bo Yan
Keyword(s):  
Wear Resistance ◽  
Wear Behavior ◽  
Casting Process ◽  
Optical Microscope ◽  
Wear Loss ◽  
Metallurgical Bonding ◽  
Heat Treated ◽  
Interfacial Structures ◽  
Significant Difference ◽  
Pin On Disc

The vacuum infiltration casting process was adopted to prepare cemented carbide (CC) particles reinforced high-Cr white cast iron (WCI) composite by using failed CC parts as reinforcement. The interfacial structures between the CC particle and iron matrix were analysed by optical microscope (OM) and X-ray diffraction (XRD); the wear behavior of the composite was studied by pin-on-disc wear tester. The results showed that: owing to partial dissolution of the CC particles and diffusion of elements such as W, C, Cr and Fe, compounds such as Fe3W3C and Co3W3C were formed, which ensured metallurgical bonding at the interface; the wear resistance property of the composite was much higher than that of the heat treated WCI, moreover, when the applied load increased from 0.4Kg to 2Kg, the wear resistance value of the composite was more than 3.5 times than that of the heat treated WCI. However, there was no significant difference in the wear loss between CC/WCI composite and WC/WCI composite.

scholarly journals Investigation of Mechanical Properties of AISI 316 Stainless Steel by Carbonitriding Process

2020 ◽  
Vol 184 ◽  
pp. 01018
Author(s):  
A Rohit Sai Krishna ◽  
B Vamshi Krishna ◽  
D Harshith ◽  
T Sashank ◽  
Ram Subbiah
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Wear Behavior ◽  
Wear Test ◽  
Salt Bath ◽  
Wear Loss ◽  
Case Hardening ◽  
Wide Range ◽  
Pin On Disc ◽  
Aisi 316 Stainless Steel

This project investigates on salt bath nitriding process in order to improve the wear behavior of the material. This process increases the hardness of the material. The specimens were nitrided at 580°c on three different timing hours such as 60 minutes, 90 minutes & 120 minutes. A pin on disc machine is used to conduct wear test, so that wear loss can be determined. The specimens are to be magnified by metallographic test like scanning electron microscope. The untreated specimen is used to compare with the nitrided specimen. The best specimen is chosen which determines the life of material & improves the better wear resistance. The hardness of untreated material and nitrided material are compared. The material AISI stainless steel has many unique properties but it lacks wear resistance and hardness because of which it has limited applications. By conducting heat treatment operation, the hardness of the material does not improve, but by conducting case hardening process the hardness of the outer case will be high compared to base metal. If the hardness and wear resistance of the material improves the material can be used in wide range of applications.

scholarly journals Influence of Artificial Aging on the Dry Sliding Wear Behavior of ADC12 Alloy-B4C-Rice Husk Ash Particulates Reinforced Hybrid Composites

2020 ◽  
Vol 9 (4) ◽  
pp. 1367-1372
Keyword(s):  
Wear Resistance ◽  
Rice Husk ◽  
Artificial Aging ◽  
Rice Husk Ash ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Testing Machine ◽  
Wear Testing ◽  
Wear Loss ◽  
Heat Treated

The influence of artificial aging on the wear behavior of ADC12 alloy reinforced with Boron carbide (B4C) and Rice Husk Ash (RHA) composites have been investigated. Hybrid composites with 5 wt. % of B4C fortification constant and variable quantity of rice husk ash particles in steps of 9 and 12 wt. % in the ADC12 alloy prepared by melt stir process. ADC12 aluminium alloy, ADC12 alloy-5 wt. % B4C-9 wt. % RHA and ADC12 alloy-5 wt. % B4C-12 wt. % RHA Samples were solutionized at a temperature of 525˚C for 1 h. Further, these solution heat treated samples were artificially aged at the temperature of 175˚C for 10 h. Microstructural characterization was carried out by using SEM and EDS. A pin-on-disc wear testing machine was utilized to assess the wear loss of specimens, in which a solidified EN32 steel plate was utilized as the counter face. Wear tests were accompanied on ADC12 alloy, ADC12 alloy-5 wt. % B4C-9 wt. % RHA and ADC12 alloy-5 wt. % B4C-12 wt. % RHA hybrid composites at varying loads of 10 N, 20 N and 30 N with varying sliding distances of 250 rpm, 500 rpm and 750 rpm for constant sliding distance of 1000 m. The wear resistance of ADC12 alloy enriched with the accumulation of B4C and RHA particulates. Further, heat treated samples were exhibited the superior wear resistance as compared to the base alloy and un-heat treated samples.

Microstructure and Dry Sliding Wear Behavior of Laser Cladding (TiC+TiN)-NiCrWC Powder Composite Coating on DZ125 Superalloy

2012 ◽  
Vol 557-559 ◽  
pp. 1699-1703 ◽  
Author(s):  
Jun Zhou ◽  
Fa Qin Xie ◽  
Jing Fang Jia ◽  
Nai Ming Lin ◽  
Xiang Qing Wu
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Laser Cladding ◽  
Wear Behavior ◽  
Optical Microscope ◽  
Dry Sliding Wear ◽  
X Ray Diffraction ◽  
Metallurgical Bonding ◽  
The Matrix ◽  
Wear Tests

Ni-based TiN-TiC composite coating was fabricated on DZ125 superalloy surface by laser cladding. The phase constitution and microstructures were investigated by means of X-ray diffraction (XRD), optical microscope (OM) and scanning electron microscope (SEM). Microhardness measurements and wear experiments without lubrication were also accomplished. The experimental results showed that a pore- and crack-free coating with metallurgical bonding to the substrate was obtained. Solidification morphologies along the section of the coating varied from directional dendrite in the interface to random dendrite in the surface. The coating was mainly composed of γ-Ni, M23C6, TiN, TiC particles and a small amount of NiTi, respectively. The average microhardness of 705HK for the coating was 2.3 times higher than that of the substrate. Wear tests indicated that wear resistance of the coating was significantly improved compared with that of the substrate. The improvement in hardness and wear resistance was attributed to TiN and TiC phase and chromium carbide uniformly dispersed in the matrix of the Ni-based TiN-TiC composite coating.

scholarly journals Experimental Investigation of Al-CuMgMn Alloy Developed by Laser Beam Surface Modification for Wear Resistance

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 712
Author(s):  
Mesay Alemu Tolcha ◽  
Moera Gutu Jiru ◽  
Hirpa Gelgele Lemu
Keyword(s):  
Wear Resistance ◽  
Wear Behavior ◽  
Manufacturing Sector ◽  
Pure Aluminum ◽  
Wear Test ◽  
Laser Surface ◽  
Surface Alloying ◽  
Metallurgical Bonding ◽  
Pin On Disc ◽  
Beam Surface

Laser surface alloying is one of the recent technologies used in the manufacturing sector for improving the surface properties of metals. Aluminum alloys are key materials in the manufacturing sector. This favors their high demand in many industries. In this study investigation, the surface alloying of pure aluminum was conducted using a CO2 laser. Four types of alloying powders were used with a 2:1:1 combination of copper, magnesium, and manganese. The hardness of the alloyed zones of Al-CuMgMn increased by 2 to 7 times at a 1.7 kW processing laser power. To assess the rate of wear for the alloyed samples, a modified Lancaster wear coefficient was considered. When the pin-on-disc wear test at 10 N and 20 N loads was analyzed with different sliding speeds, a reduction in wear by 30–50% appeared due to surface alloying. The result shows good insight into the wear behavior. In the same way, microstructure and surface morphology studies displayed a good metallurgical bonding without defects. In a statistical sense, the friction and wear behavior matched with an asperity-based model. The experimental results revealed that laser surface alloy has more wear resistance.

Dry Sliding Wear Behavior of the Reinforced by Graphite Particle and Heat Treated of Recycled Aluminum AA6061 Based MMC Fabricated by Powder Metallurgy Method

2017 ◽  
Vol 740 ◽  
pp. 9-16
Author(s):  
Ahmed Sahib Mahdi ◽  
Mohammad Sukri Mustapa ◽  
Mahmod Abd Hakim Mohamad ◽  
Abdul Latif M. Tobi ◽  
Muhammad Irfan Ab Kadir ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Powder Metallurgy ◽  
Compression Strength ◽  
Sliding Wear ◽  
Wear Behavior ◽  
High Wear Resistance ◽  
Dry Sliding Wear ◽  
Powder Metallurgy Method ◽  
Heat Treated ◽  
Improvement Ratio

The micro-hardness and compression of recycling aluminum alloy AA6061 were investigated as a function of the different microstructure and constituent powder metallurgy method. Five specimens were selected to investigate the compression strength and microhardness. The first, as fabricated specimen (as compacted), the second was as heat treated by quenching and aging process. Three specimens were mixed with Graphite particles as a reinforcement material. Compression strength values were tested for the specimens as fabricated and heat treated which were 195 and 300 MPa, respectively. The improvement ratio was 52% for the specimen as heat treated. On the other hand, high wear resistance was given by the specimen as heat treated, whereas, the lower wear strength was at the specimen mixed with 4.5% Graphite. These results were attributed to that the wear resistance related to the microhardness value.

Tribological Studies of Steels Using the Abrasive Wheel

2009 ◽  
Vol 83-86 ◽  
pp. 545-552 ◽  
Author(s):  
Majid Abbasi ◽  
S. Kheirandish ◽  
Y. Kharrazi ◽  
J. Hejazi
Keyword(s):  
Wear Resistance ◽  
Wear Behavior ◽  
Soft Materials ◽  
Test Method ◽  
High Wear Resistance ◽  
Test Results ◽  
Abrasive Wheel ◽  
Different Types ◽  
Pin On Disc ◽  
A New Technique

The abrasive wear behaviors of different types of steels were evaluated using the abrasive wheel as a new technique in the pin on disc method. It is shown that the abrasive studies using this test method is acceptable for high wear resistance metals such as Hadfield steels, while it is not proper for soft materials such as mild steel. The test results on the different materials also show that initial hardness of materials cannot merely determine the wear resistance. However, microstructural changes during the sliding have significant effect on the wear behavior and must be included.

The Effect of Boron on the Sliding Wear Behavior of Iron-Based Hardfacing Alloys for Nuclear Power Plants Valves

2006 ◽  
Vol 510-511 ◽  
pp. 562-565
Author(s):  
Jeng Wan Yoo ◽  
Kwon Yeong Lee ◽  
Ji Hui Kim ◽  
Ki Soo Kim ◽  
Seon Jin Kim
Keyword(s):  
Wear Resistance ◽  
Martensitic Transformation ◽  
Nuclear Power ◽  
Sliding Wear ◽  
Power Plants ◽  
Wear Behavior ◽  
Wear Test ◽  
Wear Loss ◽  
The Matrix ◽  
Iron Based

A new iron-based wear resistance alloy was developed to replace the Co-containing Stellite 6 alloys in nuclear power industry. The effect of B addition on the wear resistance was investigated. Sliding wear tests of Fe-Cr-C-Si-xB (x = 0.0, 0.3, 0.6, 1.0 and 2.0 wt%) alloys were performed in air at the room temperature under a contact stress of 103 MPa. Low-boron alloys containing less than 0.6 wt% boron showed an excellent wear resistance than any other tested alloys. The improvement was associated with the matrix hardening by promotion of the γ→α′straininduced martensitic transformation occurring during the wear test. However, the alloys containing more than 1.0 wt% boron showed slightly increased wear loss compared to the low-boron alloys because of the absence of the strain-induced martensitic transformation and the presence of the brittle FeB particles, aiding crack initiation.

Investigation of thermochemical boriding effect on wear behavior of a GGG 50 quality as-cast ductile iron

2016 ◽  
Vol 68 (4) ◽  
pp. 476-481 ◽  
Author(s):  
Harun Mindivan
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Ductile Iron ◽  
Room Temperature ◽  
Wear Behavior ◽  
Surface Hardness ◽  
Wear Test ◽  
Content Type ◽  
Pin On Disc ◽  
Cast Ductile Iron

Purpose This study aims to investigate the microstructure and the abrasive wear features of the untreated and pack borided GGG 50 quality ductile iron under various working temperatures. Design/methodology/approach GGG 50 quality as-cast ductile iron samples were pack borided in Ekabor II powder at 900°C for 3 h, followed by furnace cooling. Structural characterization was made by optical microscopy. Mechanical characterization was made by hardness and pin-on-disc wear test. Pin-on-disc test was conducted on a 240-mesh Al2O3 abrasive paper at various temperatures in between 25 and 450°C. Findings Room temperature abrasive wear resistance of the borided ductile iron increased with an increase in its surface hardness. High-temperature abrasive wear resistances of the borided ductile iron linearly decreased with an increase in test temperature. However, the untreated ductile iron exhibited relatively high resistance to abrasion at a temperature of 150°C. Originality/value This study can be a practical reference and offers insight into the effects of boriding process on the increase of room temperature wear resistance. However, above 150°C, the untreated ductile iron exhibited similar abrasive wear performance as compared to the borided ductile iron.

Wear Behavior of White Layer in Plasma Nitrided H13 Steel at Ambient and Elevated Temperatures

2009 ◽  
Vol 83-86 ◽  
pp. 41-48 ◽  
Author(s):  
Amir Mahmoudi ◽  
Mohamad Esmailian
Keyword(s):  
Wear Resistance ◽  
Elevated Temperature ◽  
Single Phase ◽  
Elevated Temperatures ◽  
Wear Behavior ◽  
White Layer ◽  
H13 Steel ◽  
Aisi H13 Steel ◽  
Pin On Disc ◽  
Aisi H13

In this study, AISI H13 steel was plasma nitrided in two different atmospheres, containing 25%N2-75%H2 and 4%N2-96%H2 at a constant temperature of 530oC and 6h-holding time. Dry wear behavior of nitrided samples was determined with pin-on-disc method at 25oC and 500oC, under 10N and 30N loads. The results indicated that the nitrided steels, which had a thin multiple phases white layer (produced at 4%N2-96%H2 atmosphere), didn’t have any wear resistance in ambient and elevated temperatures. However, the nitrided steels, having thick single phase white layer (produced at 25%N2-75%H2 atmosphere), showed better wear resistance in ambient temperature than in elevated temperature.

Sliding Wear Behavior of Cryogenic Treated Copper Beryllium Alloy

2016 ◽  
Vol 852 ◽  
pp. 391-396 ◽  
Author(s):  
Pervaz Ahmed Mouda ◽  
Abdul Azeez ◽  
Siddhi Jailani Hydershah
Keyword(s):  
Wear Behavior ◽  
Cryogenic Treatment ◽  
Optical Microscope ◽  
Structural Examination ◽  
Untreated Sample ◽  
Hardness Tester ◽  
Shallow Cryogenic Treatment ◽  
Pin On Disc ◽  
Steel Disc ◽  
Copper Beryllium

In this study, the effect of Shallow Cryogenic Treatment (SCT) on the wear behavior of copper beryllium alloy was investigated. The material is subjected to shallow cryogenic treatment to – 80 °C and wear study was conducted on a pin on disc apparatus. The Shallow Cryogenic treated and untreated copper beryllium alloy pins were used against hardened AISI 4140 steel disc. The micro-structural examination was carried out using optical microscope. The hardness was measured using Rockwell hardness tester. The wear track was studied using optical microscope. Microstructure study indicated that the grains of shallow cryogenic treated samples are finer than that of untreated sample. Hardness of the cryogenic treated sample is higher than that of the untreated sample. The wear resistance of cryogenic treated copper beryllium alloy has improved compared with untreated sample.

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