Hardened Edges Effects On Wear Characteristics of Cultivator Sweeps Using Circular Soil Bin Test

2021 ◽  
pp. 1-27
Author(s):  
Mehari Tekeste ◽  
Loran Balvanz ◽  
Firas Al-Aani ◽  
Adam Boesenberg ◽  
Jerry Hatfield
Keyword(s):  
Soil Quality ◽  
Welding Process ◽  
Field Tests ◽  
Cemented Carbide ◽  
Soil Conditions ◽  
Moisture Condition ◽  
Wear Characteristics ◽  
Soil Bin ◽  
Pin On Disk ◽  
Wear Resistance Coatings

Abstract Tillage tools are subject to friction and low-stress abrasive wear processes with the potential deterioration of the desired soil quality, loss of mechanical weed efficacy, and downtime for replacing worn tools. Limited experimental methods exist to quantify investigate the effect of wear-resistance coatings on shape parameters of soil-engaging tools. ASTM standard sand/rubber wheel abrasion and Pin-On-Disk tests are not able to simulate wear characteristics of complex shape of the tillage tools. Even though the tribology of tillage tools can be realistic from field tests, tillage wear tests under field conditions are expensive and often challenging to generate repeatable engineering data due to variable soil conditions in the field. A technique that simulated tillage wear of cultivator sweep in a circular soil bin filled with abrasive gravel medium and moisture condition was developed and applied to quantify the wear characteristics of cultivator sweeps with and without hard-faced edges. The hard-faced cultivator sweep had a cemented carbide chips applied to the bottom cutting edge and front tip sections of a standard cultivator sweep according to a proprietary CADENEdge welding process. The CADENEdge hard-faced sweeps showed improved wear performance 1.7 times and 3.5 times on mass and shape (sweep length and sweep wing cutting width) dimensions, respectively, compared with the un-hardened standard sweep. The results implied hard-faced cultivator sweep with cemented carbide chips provide potential in maintaining tillage productivity and the desired soil quality for seed-bed preparation.

The Effect of Stirring Tool Surface Condition on Wear Characteristics in Friction Stir Welding (FSW) Process

2021 ◽  
Vol 880 ◽  
pp. 57-62
Author(s):  
Normariah Che Maideen ◽  
Salina Budin ◽  
Koay Mei Hyie ◽  
Nor Azirah Mohd Fohimi
Keyword(s):  
Heat Treatment ◽  
Friction Stir Welding ◽  
Surface Condition ◽  
Welding Process ◽  
Wear Characteristics ◽  
Rotating Speed ◽  
Friction Stir ◽  
Ticn Coating ◽  
Tool Surface

Stirring tool is one of the important factor that contribute to the successful of Friction Stir Welding (FSW). Role of tool, is to heat the welding zone and stir the material along the process. Many studies have been conducted by other researchers to improve the performance of stirring tool. Similar to this work, it is aimed to investigate and analyze the effect of stirring tool surface condition on wear characteristics in friction stir welding process. Four tools have been fabricated with pre-determined surface condition. Tool 1: H13 without heat treatment and without coating. Tool 2: H13 with heat treatment only. Tool 3: H13 with TiCN coating only and Tool 4: H13 with heat treatment and with TiCN coating. Friction stir welding was performed to test and verify the performance of fabricated tools. Process parameter used are 1270 RPM for rotating speed while 218 mm/min for welding speed. From the result, Tool 4 performed better in terms of physical wear as well as wear rate.

Features of slopes overcoming by walking devices

2021 ◽  
Vol 9 (3) ◽  
pp. 234-240
Author(s):  
Vadim Chernyshev ◽  
Vladimir Arykantsev ◽  
Anton Goncharov ◽  
Nikolay Sharonov
Keyword(s):  
Mobile Robots ◽  
Experimental Studies ◽  
Field Tests ◽  
Soil Conditions ◽  
Adhesion Properties ◽  
Walking Machines ◽  
Volgograd Region ◽  
Propulsion Unit ◽  
Force Characteristics ◽  
Robot Body

For mobile robots designed to work in extreme conditions, an important characteristic is the value of the overcoming slope. For wheeled and tracked vehicles, the angle of the overcoming slope is limited by the adhesion properties of the soil. The walking device can provide overcoming of higher slopes, since the analogue of the adhesion coefficient for walking machines, with a large footprint track depth, can be significantly greater than 1. The paper discusses the results of experimental studies of the features of overcoming slopes by a walking device in weak soil conditions. When mobile robots overcoming inclines, they may overturn or slide downhill. It is shown that on soft soils the sliding of walking machines downhill is unlikely because of significant deformations of the soil under the support elements. On the other hand, the deformation of the soil worsens the resistance of the walking vehicle to overturning. A method of increasing resistance to overturning by controlling the position of the robot body by separately regulating the conditional clearance of walking mechanisms is considered. The possibility of adjusting the clearance in the propulsion unit on the basis of Umnov-Chebyshev cyclic walking mechanisms is shown. Climbing slopes requires a certain amount of traction. The values of the additional power and the force characteristics of the walking device’s drive necessary for successful overcoming of slopes have been determined. The results of the work can be demand in the development of walking machines and mobile robots. Key words Mobile robots, walking machines, interaction with the ground, traction and coupling properties, overcoming slopes, tipping resistance, mathematical modeling, field tests. Acknowledgements Research was partially supported by RFBR and the Administration of the Volgograd region, research projects no. 19-08-01180 a, 19-48-340007 p_a.

Volume/shear work ratio influence on wear and stress of soil chisel tine modelled by DEM

2021 ◽  
pp. 135065012110582
Author(s):  
Egidijus Katinas ◽  
Rostilav Choteborsky
Keyword(s):  
High Stress ◽  
Wear Intensity ◽  
Tool Geometry ◽  
Soil Conditions ◽  
Agricultural Equipment ◽  
Wear Analysis ◽  
Preparation Period ◽  
Soil Preparation ◽  
Soil Bin ◽  
Very High

Agricultural equipment is working in very high-stress conditions. However, it has a significant influence on the wear losses of soil processing parts. Chisel is operating at 30 cm working depth at a maximum of 12 km·h−1 working speed. Due to unpredictable soil conditions, chisel tines suffer high wear losses. It leads to time consumption and cost expenses during the soil preparation period. Wear resistance, and agronomical requirements (working depth, loosening of soil) are the main criteria of agricultural equipment producers. The discrete element method is a solution that simulates soil as sphere shape particles with soil properties. Wear results reveal the change of parts shape, acting forces, and stresses during the simulation in the virtual soil bin. The used Rocky DEM software uses a parameter C (volume/shear work ratio) to describe wear intensity, which varies for different geometry. Chisel tine geometry should be divided into sections with varied parameter C according to stress acting on the surface. The test conditions can be used for future wear analysis of varied tool geometry and protection (sintered tungsten carbide plates, hard-faced surface, etc.) agricultural tools to compare its durability in different soil conditions.

Wear Characteristics of Vacuum Sintered Steels

2011 ◽  
Vol 672 ◽  
pp. 17-22 ◽  
Author(s):  
Mario Rosso ◽  
Eva Dudrová ◽  
Marco Actis Grande ◽  
Róbert Bidulský
Keyword(s):  
Chemical Composition ◽  
Processing Condition ◽  
Surface Hardness ◽  
Wear Behaviour ◽  
Vacuum Furnace ◽  
Processing Conditions ◽  
Wear Characteristics ◽  
Sintered Steels ◽  
Pin On Disk ◽  
Disk Test

The present paper is focused on the wear characteristic of vacuum sintered Cr-Mo-[Mn]-[Cu] steels. The effect of chemical composition and the processing conditions in a vacuum furnace were evaluated. In such furnaces the cooling rate is generally determined by the pressure of the gas (N2) introduced into the chamber, the average cooling rates were calculated in the range of 1240°C to 400°C. The wear characteristics were analyzed as function of the processing and microstructures of the tested alloys through pin on disk test. Sintering of specimens in vacuum together with rapid cooling resulted in the formation of dominant martensitic microstructures with some small bainitic areas. The effect of both surface hardness and microstructure on the wear behaviour of the investigated steels shows the relation between the hardness and the wear rate. The influence of processing condition on the amount of martensite is also presented.

Investigation on Wear Behavior at High Temperature of Smooth and Bionic Non-Smooth Samples

2012 ◽  
Vol 157-158 ◽  
pp. 1628-1631
Author(s):  
Xiao Dong Yang ◽  
Zhuo Juan Yang ◽  
You Quan Chen
Keyword(s):  
High Temperature ◽  
Wear Mechanism ◽  
High Speed ◽  
Room Temperature ◽  
Wear Behavior ◽  
High Speed Steel ◽  
Wear Test ◽  
Test Method ◽  
Wear Characteristics ◽  
Pin On Disk

By using pin-on-disk wear test method, the wear behavior of W9Gr4V high speed steel with smooth and non-smooth concave samples which treated by laser texturing technology was investigated between room temperature and 500 . It was found that the anti-wear ability of the non-smooth concave samples was increased more than that of the smooth ones and the anti-wear ability of the non-smooth samples was evident than the smooth ones at temperature increasing. In this paper, the anti-wear mechanism of non-smooth concave samples and wear characteristics with smooth and non-smooth samples in high-temperature were analyzed.

Study on H2S Corrosion Resistance of L245/825 Lined Steel Pipe Welding Gap

2010 ◽  
Vol 160-162 ◽  
pp. 1264-1269 ◽  
Author(s):  
De Zhi Zeng ◽  
Yuan Hua Lin ◽  
Da Jiang Zhu ◽  
Hong Jun Zhu ◽  
Tan Gu ◽  
...  
Keyword(s):  
Welding Process ◽  
Electrochemical Corrosion ◽  
Field Tests ◽  
Cost Effective ◽  
Steel Pipe ◽  
High Acid ◽  
Pipe Welding ◽  
Acid Environment ◽  
Gas Fields ◽  
Sour Gas

The exploitation of high acid wells is facing severe corrosion challenges in the A and B gas fields in Sichuan, thus using lined steel pipe is a reliable and cost-effective anti-corrosion measure. However, lined steel pipe welding involves dissimilar steel welding, and anti-corrosion performances will be affected if the welding process is unreasonable. So it is necessary to make evaluation for corrosion of lined steel pipe. In this paper, taking welding gap of L245/825 lined steel pipe as example, the anti-SSC performances of L245/825 straight and ring welding gaps in NACE A solution were studied by CR method, and anti-cracking performances of them were evaluated by laboratory experiments. Then corrosion performances of L245/825 lined steel pipe welding gaps and L360NCS carbon steel were studied in the corrosive environment found in the Tian Dong 5-1 high sour gas well. Laboratory and field tests show that straight and ring welding gaps of L245/825 lined steel pipe have good anti-environment and anti-cracking performances of electrochemical corrosion in the high acid environment. The technology of welding process selected in the paper is reliable. Research results provide references for welding operation of L245/825 lined steel pipe in high sour gas fields.

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