scholarly journals Features of annealing of alloy steels with mixed structure

2021 ◽  
pp. 39-43
Author(s):  
V. A. Lutsenko ◽  
T. N. Golubenko ◽  
O. V. Lutsenko
Keyword(s):  
Mixed Structure ◽  
Alloy Steels

Effect of Thermomechanical Treatment on the Properties of Steel with a Mixed Martensitic-Bainitic Structure

2015 ◽  
Vol 788 ◽  
pp. 157-162
Author(s):  
Albert Popelyukh ◽  
Maria Yurkevich ◽  
Pavel Popelyukh
Keyword(s):  
Fracture Toughness ◽  
High Temperature ◽  
Thermomechanical Treatment ◽  
Lower Bainite ◽  
Mixed Structure ◽  
Tempered Martensite ◽  
Bainite Transformation ◽  
Alloy Steels ◽  
Bainitic Structure ◽  
Steel Treatment

The structure formation features of steel with 0.4 C, 1.5 Cr, 1.5 Ni, 0.5 Mo (wt. %) after high-temperature thermomechanical treatment with martensite-bainite transformation of austenite was investigated. It was found that a mixed structure consisting of alternating elongated areas of tempered martensite and lower bainite was formed by steel treatment. The proposed treatment can significantly increase impact strength and fracture toughness of steel. This technological process is mostly effective for strengthening alloy steels with increased resistance of under-cooled austenite.

Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

1983 ◽  
Vol 41 ◽  
pp. 220-221
Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Automobile Industry ◽  
High Strength ◽  
Weight Percent ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Resource Requirement ◽  
Alloy Steels ◽  
Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

EELS characterization of “Smut” layer films on steel surface prepared for chrome plating by anodic etching

1995 ◽  
Vol 53 ◽  
pp. 538-539
Author(s):  
E Y. Wang ◽  
J. T. Cherian ◽  
A. Madsen ◽  
R. M. Fisher
Keyword(s):  
Steel Surface ◽  
Surface Preparation ◽  
Treatment Method ◽  
Chrome Plating ◽  
Transmission Electron ◽  
Alloy Steels ◽  
Pre Treatment ◽  
Hard Chrome ◽  
Electron Energy Loss

Many steel parts are electro-plated with chromium to protect them against corrosion and to improve their wear-resistance. Good adhesion of the chrome plate to the steel surface, which is essential for long term durability of the part, is extremely dependent on surface preparation prior to plating. Recently, McDonnell Douglas developed a new pre-treatment method for chrome plating in which the steel is anodically etched in a sulfuric acid and hydrofluoric acid solution. On carbon steel surfaces, this anodic pre-treatment produces a dark, loosely adhering material that is commonly called the “smut” layer. On stainless steels and nickel alloys, the surface is only darkened by the anodic pre-treatment and little residue is produced. Anodic pre-treatment prior to hard chrome plating results in much better adherence to both carbon and alloy steels.We have characterized the anodic pre-treated steel surface and the resulting “smut” layer using various techniques including electron spectroscopy for chemical analysis (ESCA) on bulk samples and transmission electron microscopy (TEM) and electron energy-loss spectroscopy (EELS) on stripped films.

Characterization of Precipitation Behavior and Fracture Toughness along Thickness Direction in SA508 Gr.3 Mn-Mo-Ni Low Alloy Steels

2015 ◽  
Vol 53 (10) ◽  
pp. 700-710 ◽  
Author(s):  
Min-Chul Kim ◽  
Jaemin Song ◽  
Seokmin Hong ◽  
Bong-Sang Lee
Keyword(s):  
Fracture Toughness ◽  
Low Alloy Steels ◽  
Thickness Direction ◽  
Precipitation Behavior ◽  
Alloy Steels

Materials for bullet core

2020 ◽  
Vol 2020 (10) ◽  
pp. 8-21
Author(s):  
A. G. Kolmakov ◽  
◽  
I. O. Bannykh ◽  
V. I. Antipov ◽  
L. V. Vinogradov ◽  
...  
Keyword(s):  
High Speed ◽  
Bending Strength ◽  
Low Alloy Steels ◽  
Hard Alloys ◽  
Small Arms ◽  
Alloy Steels ◽  
Materials Used ◽  
Basic Ideas ◽  
New Generation ◽  
Natural Composite

he basic ideas about the process of introducing cores into protective barriers and the most common core patterns and their location in conventional and sub-caliber small arms bullets are discussed. The materials used for manufacture of cores are analyzed. It is concluded that for mass bullets of increased armor penetration the most rational choice can be considered the use of high-carbon low-alloy steels of a new generation with a natural composite structure and hardness of up to 70 HRC. For specialized armor-piercing bullets, cores made from promising economically-alloyed high-speed steels characterized by a high complex of «hardness—bending strength» are better alternative than ones made of hard alloys or tungsten alloys.

COPPER ALLOY No. 647

Alloy Digest ◽  
1971 ◽  
Vol 20 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Silicon Alloy ◽  
Copper Nickel ◽  
Alloy Steels ◽  
Nickel Silicon

Abstract COPPER ALLOY No. 647 is an age-hardenable copper-nickel-silicon alloy which can be age hardened to strength levels equivalent to those of many alloy steels. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-230. Producer or source: Copper and copper alloy mills.

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