scholarly journals HARDNESS AND MICROSTRUCTURE OF 0.60%C STEEL HARDENED IN TRANSESTRIFIED NEEM OIL

2020 ◽  
Vol 4 (3) ◽  
pp. 679-684
Author(s):  
R. M. Dodo ◽  
K. A. Bello ◽  
J. O. Gaminana ◽  
I. A. Hayatudeen ◽  
A. Muhammad ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Impact Strength ◽  
Retained Austenite ◽  
Microstructural Analysis ◽  
Plain Carbon Steel ◽  
Good Combination ◽  
Bench Mark ◽  
Neem Oil ◽  
Quench Medium

The hardness, impact strength and microstructure of 0.60%C plain carbon steel quenched-hardened in transesterified neem oil (TN) are reported in the study. Fresh neem oil (FN) was transesterified using methanol. Afterwards, steel samples normalized and then austenitized at 850oC for 40 minutes and then quenched in TN, FN and SAE40. The quenchant used as bench mark was SAE40. The as-quenched samples’ hardness and impact strength tested. Additionally, microstructural analysis on the as-quenched samples was carried out. TN-quenched sample exhibits higher hardness and impact strength as compared to FN-quenched parts. In all the quenched samples, martensite and retained austenite were observed. The investigation shows that TN gives good combination of hardness and impact strength. Therefore, TN is recommended to be used as quench medium for 0.60%C (AISI 1060) steel

Pyrolytic carbon filaments and associated catalytic particles formed in steel tubes

1984 ◽  
Vol 42 ◽  
pp. 662-663
Author(s):  
Y. L. Chen ◽  
J. R. Bradley
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Catalyst Particle ◽  
Pyrolytic Carbon ◽  
Plain Carbon Steel ◽  
304 Stainless Steel ◽  
Hydrocarbon Gases ◽  
Steel Tubes ◽  
Filamentous Carbon ◽  
Carbon Filaments

Considerable effort has been directed toward an improved understanding of the production of the strong and stiff ∼ 1-20 μm diameter pyrolytic carbon fibers of the type reported by Koyama and, more recently, by Tibbetts. These macroscopic fibers are produced when pyrolytic carbon filaments (∼ 0.1 μm or less in diameter) are thickened by deposition of carbon during thermal decomposition of hydrocarbon gases. Each such precursor filament normally lengthens in association with an attached catalyst particle. The subject of filamentous carbon formation and much of the work on characterization of the catalyst particles have been reviewed thoroughly by Baker and Harris. However, identification of the catalyst particles remains a problem of continuing interest. The purpose of this work was to characterize the microstructure of the pyrolytic carbon filaments and the catalyst particles formed inside stainless steel and plain carbon steel tubes. For the present study, natural gas (∼; 97 % methane) was passed through type 304 stainless steel and SAE 1020 plain carbon steel tubes at 1240°K.

SAE 1025

Alloy Digest ◽  
1987 ◽  
Vol 36 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Carbon Steel ◽  
Heat Treating ◽  
Plain Carbon Steel ◽  
General Purpose ◽  
Pressure Vessels ◽  
Permanent Mold ◽  
Steel Mills ◽  
Cold Worked ◽  
Permanent Mold Castings

Abstract SAE 1025 is a plain carbon steel for general-purpose construction and engineering. It is used in the hot-worked, cold-worked, normalized or water-quenched-and-tempered condition. It also is carburized and used for case-hardened parts. Its many uses include bolts, forgings, axles, machinery components, cold-extruded parts, pressure vessels, case-hardened parts, chain and sprocket assemblies, spinning tools and permanent-mold castings. This datasheet provides information on composition, physical properties, 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: CS-114. Producer or source: Carbon steel mills.

Microstructure and Mechanical Properties of a Low-Carbon Steel Treated by One-Step Quenching and Partitioning Process

2014 ◽  
Vol 1082 ◽  
pp. 202-207 ◽  
Author(s):  
Shu Yan ◽  
Xiang Hua Liu
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Microstructural Evolution ◽  
Retained Austenite ◽  
Uniform Elongation ◽  
Low Carbon Steel ◽  
Total Elongation ◽  
Low Carbon ◽  
Quenching And Partitioning ◽  
Partitioning Time

A low carbon steel was treated by quenching and partitioning (Q&P) process, and a detailed characterization of the microstructural evolution and testing of mechanical properties were carried out. The resulted mechanical properties indicate that with the partitioning time increasing, the tensile strength decreases rapidly first and then remains stable, and the total elongation increases first then decreases. The investigated steel subjected to Q&P process exhibits excellent products of strength and elongation (17.8-20.6 GPa•%). The microstructural evolution of martensite matrix during the partitioning step was observed, and the morphology and content of retained austenite were characterized. The working hardening behavior of the samples was analyzed, and the retained austenite with higher carbon content contributes to the uniform elongation more effectively.

Wear behaviour of thermal flame sprayed FeCr coatings on plain carbon steel substrate

2007 ◽  
Vol 190 (1-3) ◽  
pp. 204-210 ◽  
Author(s):  
B. Uyulgan ◽  
E. Dokumaci ◽  
E. Celik ◽  
I. Kayatekin ◽  
N.F. Ak Azem ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Steel Substrate ◽  
Plain Carbon Steel ◽  
Wear Behaviour

Ferritic Nitrocarburizing of SAE 1010 Plain Carbon Steel Parts

2015 ◽  
Vol 8 (2) ◽  
pp. 482-486
Author(s):  
Madhavan Manivannan ◽  
Vesselin Stoilov ◽  
Derek O. Northwood
Keyword(s):  
Carbon Steel ◽  
Plain Carbon Steel ◽  
Ferritic Nitrocarburizing
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