scholarly journals Green Preparation and Dry Sliding Wear Properties of a Macro-ZTA/Fe Composite Produced by a Two-Step Method

Metals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 986 ◽  
Author(s):  
Qiu ◽  
Xing ◽  
Dong
Keyword(s):  
Wear Resistance ◽  
Sliding Wear ◽  
Casting Process ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Properties ◽  
Step Method ◽  
High Chromium Cast Iron ◽  
Flow Mixing ◽  
Interface Cracking

In this paper, a two-step method, rapid-flow mixing followed by high-pressure compositing was used to prepare a macro-ZTA (ZrO2-toughened Al2O3) particles reinforced high chromium cast iron (HCCI) matrix composite. The method is based on the squeeze casting process without general casting pollution problems. The microstructure, mechanical properties and dry sliding wear performance of the fabricated composite were investigated. The results showed that the particles were distributed uniformly throughout the iron matrix and a tightly bonded interface was obtained. Under dry sliding wear conditions, the wear resistance of the composite was significantly improved in comparison with the HCCI alloy, and the relative wear resistance was 1.8 and 2.9 times at the applied load of 300 and 900 N, respectively. When the load increased from 300 N to 900 N, the wear characteristics of the composite changed from shallow and narrow grooves and scratches to damages in the form of fragmentation of particles, transfer layer and interface cracking.

Study on Tribological Properties of a New Fe3Al-Based Alloy as an Alternative Material for Scraper Conveyor

2021 ◽  
Vol 143 (10) ◽  
Author(s):  
Qingliang Wang ◽  
Li Meng ◽  
Hui Chen ◽  
Qihao Zheng
Keyword(s):  
Wear Resistance ◽  
Quartz Sand ◽  
Sliding Wear ◽  
Strengthening Mechanism ◽  
Dry Sliding Wear ◽  
Wear Loss ◽  
Dry Sliding ◽  
Wear Properties ◽  
42Crmo Steel ◽  
Scraper Conveyor

Abstract This work reports on the sliding wear properties of Fe3Al-based alloy in conditions of dry sliding and quartz sand abrasion. The wear strengthening mechanism is also analyzed in detail. On this basis, the feasibility of using Fe3Al-based alloy instead of 42CrMo steel to make the wear-resistant scraper components in scraper conveyor is discussed. The results show that the wear mass loss and wear-rate of Fe3Al-based alloy are significantly lower than 42CrMo steel in dry sliding wear and abrasion by quartz sand, which indicates good sliding wear resistance. The wear resistance of Fe3Al-based alloy can be attributed to the grain boundary strengthening caused by the carbide precipates, dislocation fine-grained strengthening, and hard phase strengthening of Al2O3 in the wear surface. Compared with quenched and tempered 40CrMo steel, the lower density of Fe3Al-based alloy can reduce the weight of scraper components by about 15%, and the lower matrix hardness can reduce the wear loss of middle groove and scraper chain. The hardening effect of the worn surface layer can effectively improve the sliding wear resistance of the scraper by about 68%, which is very beneficial to improve the service life and reliability of the scraper conveyor.

Effect of Si content on the dry sliding wear properties of spray-deposited Al–Si alloy

2004 ◽  
Vol 25 (2) ◽  
pp. 163-166 ◽  
Author(s):  
Feng Wang ◽  
Huimin Liu ◽  
Yajun Ma ◽  
Yuansheng Jin
Keyword(s):  
Sliding Wear ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Properties ◽  
Si Content

scholarly journals Effect of Necklace-Type Distribution of SiC Particles on Dry Sliding Wear Behavior of As-Cast AZ91D/SiCp Composites

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 296 ◽  
Author(s):  
Chao Sun ◽  
Nannan Lu ◽  
Huan Liu ◽  
Xiaojun Wang ◽  
Xiaoshi Hu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Interface Bonding ◽  
Type Distribution ◽  
Wear Rates ◽  
Sic Particles ◽  
The Matrix

In this study, the dry sliding wear behaviors of SiC particle reinforced AZ91D matrix composites fabricated by stirring casting method were systematically investigated. The SiC particles in as-cast composites exhibited typical necklace-type distribution, which caused the weak interface bonding between SiC particles and matrix in particle-segregated zones. During dry sliding at higher applied loads, SiC particles were easy to debond from the matrix, which accelerated the wear rates of the composites. While at the lower load of 10 N, the presence of SiC particles improved the wear resistance. Moreover, the necklace-type distribution became more evident with the decrease of particle sizes and the increase of SiC volume fractions. Larger particles had better interface bonding with the matrix, which could delay the transition of wear mechanism from oxidation to delamination. Therefore, composites reinforced by larger SiC particles exhibited higher wear resistance. Similarly, owing to more weak interfaces in the composites with high content of SiC particles, more severe delamination occurred and the wear resistance of the composites was impaired.

Improving the Wear Resistance of Aluminum Fly Ash Composites by Multipass Friction Stir Processing

2015 ◽  
Vol 642 ◽  
pp. 55-59 ◽  
Author(s):  
Shueiwan Henry Juang ◽  
Liang Jing Fan ◽  
Hsu Shuo Chang
Keyword(s):  
Wear Resistance ◽  
Fly Ash ◽  
Friction Stir Processing ◽  
Sliding Wear ◽  
Normal Load ◽  
Aluminum Matrix ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Rates ◽  
Friction Stir

In this study, the multi-pass friction stir processing (MP-FSP) technique was performed on ADC6 aluminum alloy + 5 wt% fly ash composite (A5FC) castings to increase their surface area. The dry sliding wear behaviors of the ADC6 alloy, A5FCs, and MP-FSPed A5FCs were evaluated. Dry sliding wear tests were performed using a ring-on-washer machine at a constant rotation speed of 100 rpm for 60 min, and the normal load was 10, 20, 30, and 40 N. The results showed that the MP-FSPed A5FCs had the lowest wear rates in the load range from 10 to 40 N, and adhesive wear was the major wear mechanism in these tests. The increased wear resistance was mainly due to grain refinement and elimination of casting defects after subjecting the ash composite to MP-FSP. The microstructure of the MP-FSPed A5FCs reveals that the sizes of the added raw fly ash particles decreased from micro-to nanoscale levels, and the nanoscale fly ash was uniformly dispersed in the aluminum matrix.

Characterization of dry sliding wear resistance of laser surface hardened En 8 steel

2005 ◽  
Vol 167 (1) ◽  
pp. 83-90 ◽  
Author(s):  
Rakesh Kaul ◽  
P. Ganesh ◽  
Pragya Tiwari ◽  
R.V. Nandedkar ◽  
A.K. Nath
Keyword(s):  
Wear Resistance ◽  
Sliding Wear ◽  
Laser Surface ◽  
Dry Sliding Wear ◽  
Dry Sliding
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