Assessment of wear resistance of hardened additive products made of electroerosive cobalt-chromium powder

2021 ◽  
pp. 73-75
Author(s):  
Keyword(s):  
Wear Resistance ◽  
Wear Track ◽  
Experimental Studies ◽  
Surface Friction ◽  
Sample Surface ◽  
Chromium Alloy ◽  
Cobalt Chromium ◽  
Chromium Powder ◽  
Friction Path ◽  
Wear Products

Experimental studies of the wear resistance of hardened additive products made of electroerosive cobaltchromium powder obtained in alcohol are carried out. With a friction path of 500 m, the following was established: partial wear of the counterbody and adhesion of wear products of the sample to the counterbody; the size of the wear track of the sample; the depth of the profile of the wear groove of the sample surface; friction coefficient; wear of a counterbody made of steel and a hardened sample made of a cobalt-chromium alloy. Keywords: electroerosive cobalt-chromium powder, additive product, hardening, wear resistance. [email protected]

Investigation of the structure and properties of reinforced additive products obtained from electroerosive cobalt-chromium powder

2021 ◽  
pp. 232-236
Author(s):  
E.V. Ageev ◽  
E.V. Ageeva ◽  
A.A. Sysoev
Keyword(s):  
Wear Track ◽  
Structure And Properties ◽  
Sintered Steel ◽  
Cobalt Chromium ◽  
Chromium Powder ◽  
High Chromium ◽  
The Coefficient Of Friction ◽  
Steel Aisi ◽  
Friction Path ◽  
Stainless Steel Aisi

The analysis of the wear resistance characteristics of samples sintered from high-chromium electroerosive powders obtained in kerosene on a friction path of 500 m is performed. It was established experimentally that: there is a partial wear of the counterbody and the buildup of the products of wear of the sample on centralo; the magnitude of the wear track of the sample is 383,1 µm to 473,5 mm; the depth of the profile grooves of the wear surface of the sample is 5 microns; the coefficient of friction of the surface of the sample is from 0,228 to 0,826; the wear rate of the counterbody made of Stainless Steel AISI 420 and the sample made of sintered steel 12X17 are 0.016 and 1.138, respectively.

scholarly journals MORPHOLOGY AND ELEMENTAL COMPOSITION OF COBALT-CHROMIUM POUDERS-ALLOYS PRODUCED FOR ADDITIVE TECHNOLOGIES BY ELECROEROSION DISPERSION OF METAL DISCARD IN WATER

2017 ◽  
Vol 21 (4) ◽  
pp. 21-31
Author(s):  
E. V. Ageeva ◽  
A. Yu. Altukhov ◽  
А. G. Ivakhnenko
Keyword(s):  
Experimental Studies ◽  
Component Composition ◽  
Additive Technologies ◽  
Test Material ◽  
Distilled Water ◽  
Chromium Alloy ◽  
Cobalt Chromium ◽  
Chromium Powder ◽  
Working Medium ◽  
Electroerosion Dispersion

Extensive use of electroerosion dispersion (EED) method to recycle metal discard into powders for their re-use in additive technologies is limited by a lack of complete data on the effects of the initial composition, production modes and media on the properties of produced powders and their application technologies. Hence there is a need in new re-use technologies for alloy-powder produced from nichrome scrap and in the assessment of their efficiency, which in its turn requires integrated theoretical and experimental studies. The goal of the presented work was to investigate morphology and element composition of cobalt-chromium alloy-powders that had been produced for additive technologies by eletroerosion dispersion of CCh alloy in distilled water. Research and test material was cobalt-chromium scrap of “TSELIT” alloy grade. The working medium was distilled water. To produce cobalt-chromium powders by electroerosion dispersion an EED plant for current conducting materials. Metal scrap was charged into the reactor filled with working medium, distilled water; the process was run at the following parameters: energy discharge capacitor capacity was 28 mcF, voltage 110 V pulse frequency 100 Hz. The results of the research of the morphology and component composition of cobalt-chromium powder-alloys that had been produced for additive technologies by electroerosion dispersion of cobalt-chromium TSELIT alloy scrap in distilled water demonstrated that the majority of particles in the powder had regular sphere or oval shape, with large amount of surface oxygen, which required additional chemical treatment before use in additive technologies.

scholarly journals Influence of lubrication on the friction and wear of car rolling bearings

2021 ◽  
Vol 101 (3) ◽  
pp. 81-88
Author(s):  
O. Dykha ◽  
O. Makovkin ◽  
S. Posonsky ◽  
Keyword(s):  
Wear Resistance ◽  
Friction And Wear ◽  
Experimental Studies ◽  
Test Results ◽  
Rolling Bearings ◽  
Friction Units ◽  
Internal Contact ◽  
Experimental Approaches ◽  
Friction Path ◽  
Wear Law

The goal of the work is to develop computational and experimental approaches to determine the wear resistance of friction units with internal contact of cylinders with slip. The scientific novelty consists in taking into account the slip for calculating the friction path and the wear of the cylinders with internal contact and the proposed method for identifying the parameters of the wear law based on the test results. Practical value is the proposed methods to account load, slip and lubrication conditions on the resource for the design of friction units. The dependences for determining the friction path for internal rolling of cylinders have been considered. The design of an experimental setup for studying friction and wear of cylinders with slip has been proposed. Experimental studies have been carried out: paths of friction; wear of surfaces both with a key and without a key; the effect of lubricants on wear has been studied. The form of the wear model is proposed to determine the effectiveness of methods for increasing wear resistance. The method for determining the parameters of the wear law has been implemented based on the test results. The results show the efficiency of copper powder as an additive to a lubricant. It has been established that the wear of cylinders with a key is greater than the wear of cylinders without a key due to different friction paths. A practical example of determining the wear of a car hub shaft using the wear patterns is presented.

scholarly journals ANALYSIS OF CHARACTERISTICS OF WEAR RESISTANCE OF SINTERED ITEMS FROM ELECTROEROSION LEAD BRONZE OBTAINED IN KEROSIN LIGHT

2020 ◽  
pp. 25-28
Author(s):  
E. V. Ageev ◽  
A. S. Pereverzev
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Sample Surface ◽  
Radius Of Curvature ◽  
Mean Deviation ◽  
Test Scheme ◽  
Wear Factor ◽  
Dispersed Particles ◽  
Friction Path ◽  
Sintered Product

The article presents the results of a study of the wear resistance of sintered samples of lead erosion bronze. Dispersed particles were obtained by electroerosive dispersion of BrS30 alloy waste in a carbon-containing medium - illuminating kerosene. Then, the obtained erosion materials were pressed using a Herzog TP 20 hand-held table press at a pressure of 1500 MPa and sintered in a Nabertherm GmbH RS 80/300/13 furnace for 2 hours at a temperature of 827 ° C in argon atmosphere. Then studied the surface roughness of the obtained samples, the friction coefficient and the wear factor of the samples. The friction coefficient and the wear rate of the surface of the samples and the counterbody were measured on an automated friction machine according to the standard ball-disk test scheme. The tests were carried out in air at a load of 2 N and a linear speed of 10 cm / sec, a radius of curvature of wear of 5-6 mm, the friction path was 200 meters. It was shown that the roughness by three measurements of the sample surface is Ra = 0.38 μm, the height of the profile irregularities at 10 points 𝑅𝑧 = 10.3. The arithmetic mean deviation of the profile of the sintered product corresponds to the 8th class of roughness of the parts. The height of the profile irregularities at 10 points corresponds to the 6th class of roughness of the parts. The friction coefficient was 0.395. The wear factor of the sample was 347x10 mm3Nm.

DELORO STELLITE 25

Alloy Digest ◽  
2021 ◽  
Vol 70 (11) ◽  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Base Alloy ◽  
Chromium Alloy ◽  
Cobalt Chromium ◽  
Alloy Matrix ◽  
Cobalt Base Alloy ◽  
Cocr Alloy ◽  
Cobalt Base ◽  
Cobalt Chromium Alloy

Abstract Deloro Stellite 25 is a cobalt-chromium-tungsten-nickel alloy. This tungsten strengthened cobalt-chromium alloy is the cast version of the wrought cobalt-base alloy L605. Deloro Stellite 25 is resistant to wear, galling, and corrosion and retains this resistance at high temperatures. Its exceptional wear resistance is due mainly to the unique inherent characteristics of the hard carbide phase dispersed in a CoCr alloy matrix. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as machining. Filing Code: Co-142. Producer or source: Deloro Wear Solutions GmbH.

scholarly journals Delivery of paclitaxel from cobalt–chromium alloy surfaces without polymeric carriers

Biomaterials ◽  
2010 ◽  
Vol 31 (20) ◽  
pp. 5372-5384 ◽  
Author(s):  
Gopinath Mani ◽  
Celia E. Macias ◽  
Marc D. Feldman ◽  
Denes Marton ◽  
Sunho Oh ◽  
...  
Keyword(s):  
Chromium Alloy ◽  
Cobalt Chromium ◽  
Polymeric Carriers ◽  
Cobalt Chromium Alloy
Sign in / Sign up

Export Citation Format

Share Document