scholarly journals Influence of a Chemical Composition on Heat Resistance and Impact Wear Resistance of Materials Based on Atomized Powders of High-Chromium Steel

2021 ◽  
Vol 19 (4) ◽  
pp. 45-55
Author(s):  
B.G. Gasanov ◽  
◽  
A.V. Babets ◽  
S.S. Baev ◽  
◽  
...  
Keyword(s):  
Wear Resistance ◽  
Chemical Composition ◽  
Heat Resistance ◽  
Chromium Steel ◽  
Impact Wear ◽  
High Chromium

scholarly journals Microstructural evolution during austempering of a ASTM A-532 CLASS III type high chromium white cast iron undergoing abrasive wear

2017 ◽  
Vol 26 (46) ◽  
Author(s):  
Oscar Fabián Higuera-Cobos ◽  
Jeison Bucurú-Vasco ◽  
Andrés Felipe Loaiza-Patiño ◽  
Mónica Johanna Monsalve-Arias ◽  
Dairo Hernán Mesa-Grajales
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Cast Iron ◽  
Chemical Composition ◽  
Abrasive Wear ◽  
Retained Austenite ◽  
White Cast Iron ◽  
Abrasive Wear Resistance ◽  
Class Iii ◽  
High Chromium

This paper studies the influence of variables such as holding temperatures and times during austempering of High Chromium White Cast Iron (HCWCI), with the following chemical composition: Cr 25 %, C 3 %, Si 0.47 %, Mn 0.74 % and Mo 1.02 %. The aim of the austempering was to modify the percentage of retained austenite and its correlation to abrasive wear resistance under different conditions.Microhardness tests, SEM-EDS and XRD were performed to determine mechanical properties, chemical composition, and type of carbides and microstructures present, respectively. The tests complied with the ASTM G-65 standard. Results showed that the best performance against abrasion was achieved for austempering at 450 ºC with holding time of 6 hours.

Research of the composition, structure and properties of deposited alloys of the titanium—aluminum system doped with chrome

2021 ◽  
pp. 470-475
Author(s):  
A.I. Kovtunov ◽  
A.G. Bochkarev
Keyword(s):  
Wear Resistance ◽  
Chemical Composition ◽  
Heat Resistance ◽  
Titanium Aluminide ◽  
Titanium Aluminides ◽  
Structure And Properties ◽  
Composition And Structure ◽  
Titanium Aluminum ◽  
Composition Structure

The results of the study of the processes of argon-arc surfacing of alloys based on titanium aluminides doped with chromium are presented. The effect of surfacing modes on the chemical composition and structure of the deposited alloys has been established. The results of testing the hardness, wear resistance and heat resistance of chromium-alloyed alloys based on titanium aluminide are presented.

Investigation of structure and properties of surfaced coatings based on titanium nickelide

2021 ◽  
Vol 4 ◽  
pp. 81-88
Author(s):  
A. I. Kovtunov ◽  
◽  
D. I. Plahotny ◽  
T. V. Semistenova ◽  
A. G. Bochkarev ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Phase Composition ◽  
Chemical Composition ◽  
Heat Resistance ◽  
Titanium Nickelide ◽  
Nickel Electrode ◽  
Structure And Properties ◽  
Relative Wear ◽  
Relative Wear Resistance

The conditions for formation of coatings based on titanium nickelide under the argon double-arc surfacing of titanium and nickel electrode wires on the titanium samples were shown. Results of evaluating the quality of formation and geometric parameters of the weld at the double-arc surfacing were presented. Relationship between the ratio of feed rates of nickel and titanium wires and chemical composition of the deposited coatings has been established. Investigations of the structure of the surfaced metal at the surfacing modes was carried out. It has been shown that argon double-arc surfacing formed coatings based on the Ti2Ni and TiNi. Mechanical and operational properties of surfaced coatings were studied — hardness, resistance to abrasion and heat resistance at 800 °С. Relative wear resistance of surfaced coatings is higher than that of titanium samples. Dependence of the relative wear resistance of the coatings on the chemical and phase composition was shown. Dependence of heat resistance of the surfaced coatings on the modes of surfacing and the chemical composition of the weld metal is established.

Influence of Heat Treatment on the Microstructure of a High Chromium Steel Used for the Manufacture of Rolling Rolls

2010 ◽  
Vol 638-642 ◽  
pp. 3099-3104 ◽  
Author(s):  
Ines Fernández Pariente ◽  
J.Manuel Artimez ◽  
F.Javier Belzunce ◽  
Cristina Rodríguez
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
High Hardness ◽  
Chromium Steel ◽  
High Chromium ◽  
Austenite Content ◽  
Treatment Optimisation ◽  
Maintenance Time

The aim of this work was the study of the heat treatment optimisation of high chrome steels used for the manufacture of rolling rolls in order to obtain a final product with a high hardness and wear resistance and taking into account the very large dimensions typical of these products. The effect of modifying the maintenance temperature and time during the different phases of the heat treatment on the microstructure and hardness of this product was evaluated. The necessity of adjusting the temperature and maintenance time of the quenching heat treatment in order to obtain a martensitic/bainitic matrix with a low austenite content followed by two tempering treatments was demonstrated as the best way to obtain the optimal properties of the product for this particular application.

scholarly journals Effect of heat treatment on hardness and wear resistance of high carbon-high chromium steel (fmu-11)

10.30544/596 ◽  
2021 ◽  
Author(s):  
Alireza Darvishi ◽  
Aria Daneshmayeh ◽  
Alihosein Salehi ◽  
Mahdi Ahmadi ◽  
Alireza Soleymani
Keyword(s):  
Wear Resistance ◽  
Cryogenic Treatment ◽  
Wear Test ◽  
Optical Microscope ◽  
Chromium Steel ◽  
Steel Matrix ◽  
High Carbon ◽  
High Chromium ◽  
Heat Treated ◽  
Depth Analysis

In the present study, microstructure, hardness, and abrasion resistance of a heat-treated high carbon-high chromium steel (FMU-11) used in the cement mills were investigated. To investigate the best heat-treating cycle for the FMU-11 steel, three sets of samples were heat treated. The first set was tempered two times, the second set was re-hardened, and the third set was cryogenically heat treated. These samples were then compared with the conventionally heat-treated samples. The samples' microstructure was studied using an optical microscope, where traditional black and white etching, as well as color etching, were used. Scanning electron microscopy (SEM) was applied for higher magnification studies and in-depth analysis of the chemical composition. The mechanical properties were investigated by measuring the hardness and the wear resistance for the samples heat-treated in different cycles. The results showed that the cryogenic treatment and double-tempered samples had the highest hardness and wear resistance. In addition, the results showed that the re-hardening operation caused the carbides to be finely separated and evenly distributed in the steel matrix. The wear test results illustrated that the wear mechanism could be the delamination wear and the abrasive wear combined.

Increasing the Abrasive Wear Resistance of High-Chromium Steel after Cold Treatment

2018 ◽  
Vol 284 ◽  
pp. 1157-1162
Author(s):  
Mikhail A. Filippov ◽  
N. Ozerets ◽  
S.M. Nikiforova ◽  
E. Smagireva
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Abrasive Wear ◽  
Cold Treatment ◽  
Residual Austenite ◽  
Chromium Steel ◽  
Abrasive Wear Resistance ◽  
High Carbon ◽  
High Chromium ◽  
Initial Hardness

Ways to increase the abrasive wear resistance of high-chromium steel depending on changes in the temperature of heating for quenching and cold treatment are studied in this paper. It was found that during quenching from temperatures of 850-1000 °C, martensite is formed in the structure of steel H12МFL, which provides high hardness: however, maximum abrasion resistance is not achieved in conditions of abrasive wear. An increase in the heating temperature for quenching to 1170 °C leads to a decrease in the initial hardness, which is due to the dissolution of carbides and an increase in the amount of residual austenite, but this is accompanied by a significant increase in wear resistance in abrasive wear. Residual austenite, obtained as a result of high-temperature hardening (from 1170 °C), is metastable and, in the process of wear, becomes a deformation-induced martensite. This gives the steel maximum wear resistance due to its high frictional hardening ability. A further increase in the temperature of heating for quenching above 1170 °C is inexpedient, since it leads to grain growth. Additional possibilities for increasing abrasive wear resistance consist of the cold treatment of high-carbon steels because of an increase in the amount of cooled martensite and an increase in the initial hardness. Cold treatment of the test steel after high-temperature quenching with cooling to minus 70 °C for 20 min and low tempering at a temperature of 200 °C for 2 h allows for further increases to the abrasion resistance by 25% due to the formation of 15% high-carbon chromic martensite cooling and initial hardness up to 60 НRC, with the preservation of 20% of residual metastable austenite and carbides.

scholarly journals Formation of TiN film on high carbon-high chromium steel by ion beam implanted vapor deposition(IVD) and its wear resistance.

1988 ◽  
Vol 39 (10) ◽  
pp. 630-635
Author(s):  
Junichi SHIMOMURA ◽  
Tatsumi KIMURA ◽  
Syuzo UEDA ◽  
Mamoru SATOU ◽  
Kanenaga FUJII ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Vapor Deposition ◽  
Ion Beam ◽  
Chromium Steel ◽  
High Carbon ◽  
High Chromium ◽  
Tin Film

AISI TYPE 440B

Alloy Digest ◽  
1969 ◽  
Vol 18 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Heat Treating ◽  
Chromium Steel ◽  
Ball Bearings ◽  
High Carbon ◽  
High Chromium ◽  
Steel Mills ◽  
Aisi Type

Abstract AISI Type 440B is a hardenable high-carbon high-chromium steel recommended stainless for cutlery, valve parts, ball bearings, pivot pins, etc. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-223. Producer or source: Stainless steel mills.

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