Investigation of the Microstructures and Mechanical Properties of Nano- and Sub-Micron Composite Low Carbon Alloy Steel

2006 ◽  
Author(s):  
Chunde Jia ◽  
Zhanqiang Duan ◽  
Shutong Yang ◽  
Guohui Zhang ◽  
Zhuangzhi Xu
Keyword(s):  
Mechanical Properties ◽  
Alloy Steel ◽  
White Layer ◽  
Engineering Application ◽  
High Hardness ◽  
Diffusion Method ◽  
High Wear Resistance ◽  
Low Carbon ◽  
The Matrix ◽  
Composite Steel

The low carbon alloy steel was single face treated by a special hot diffusion method, and thus the gradual composite steel was produced. The microstructures of composite steel were very different from the matrix steel, white layer speared near the treated surface, and nano- and sub-micron particles were existed in the white layer. The results of ramon spectrum test indicated that the nano- and sub-micron particles can transfer several millimeters, several centimeters or even more. The mechanical properties changed sharply compared with the matrix steel. The hardness and the tensile strength near the treated surface were much higher than the matrix steel, and decreased gradually with the increase of distance to the treated surface. The composite steel has high strength, high hardness, high wear-resistance, high corrosion-resistance and etc. From the engineering application point of view, this technique can be used to produce super high qualities alloy steels, which can be used to the field as: metallurgy, mine, automobile, manufacture, energy sources, and etc.

LUCEFIN C20

Alloy Digest ◽  
2021 ◽  
Vol 70 (3) ◽  
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Tensile Properties ◽  
Alloy Steel ◽  
Heat Treating ◽  
Low Carbon ◽  
Wear Resistant ◽  
The Core

Abstract Lucefin C20 is a low-carbon, non-alloy steel that is used in the normalized, cold finished, or quenched and tempered condition. It may also be used in the carburized or carbonitrided, and subsequently quench hardened and tempered, condition for parts requiring a hard wear-resistant surface, but with little need for increased mechanical properties in the core. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-209. Producer or source: Lucefin S.p.A..

scholarly journals Effect of Heat-treatment Parameters of Cast Iron GJS-X350NiMnCu7-3-2 on its Structure and Mechanical Properties

2017 ◽  
Vol 17 (1) ◽  
pp. 121-126 ◽  
Author(s):  
D. Medyński ◽  
A. Janus ◽  
S. Zaborski
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Cast Iron ◽  
High Hardness ◽  
Spheroidal Graphite ◽  
Air Cooling ◽  
Material Hardness ◽  
The Matrix ◽  
Lower Material

Abstract The paper presents influence of soaking parameters (temperature and time) on structure and mechanical properties of spheroidal graphite nickel-manganese-copper cast iron, containing: 7.2% Ni, 2.6% Mn and 2.4% Cu. Raw castings showed austenitic structure and relatively low hardness (150 HBW) guaranteeing their good machinability. Heat treatment consisted in soaking the castings within 400 to 600°C for 2 to 10 hours followed by air-cooling. In most cases, soaking caused changes in structure and, in consequence, an increase of hardness in comparison to raw castings. The highest hardness and tensile strength was obtained after soaking at 550°C for 6 hours. At the same time, decrease of the parameters related to plasticity of cast iron (elongation and impact strength) was observed. This resulted from the fact that, in these conditions, the largest fraction of fine-acicular ferrite with relatively high hardness (490 HV0.1) was created in the matrix. At lower temperatures and after shorter soaking times, hardness and tensile strength were lower because of smaller degree of austenite transformation. At higher temperatures and after longer soaking times, fine-dispersive ferrite was produced. That resulted in slightly lower material hardness.

The Effect of Microstructure on Properties of Fe-Cr-C-Nb/Ti Hardfacing Alloy

2011 ◽  
Vol 279 ◽  
pp. 126-131 ◽  
Author(s):  
Wen Bo Tang ◽  
Yun Gang Guo ◽  
Hon Grui Wang
Keyword(s):  
Wear Resistance ◽  
Alloy System ◽  
Energy Dispersive Spectrum ◽  
High Wear Resistance ◽  
Low Carbon ◽  
Shielded Metal Arc Welding ◽  
Wear Resistant ◽  
Hardfacing Alloy ◽  
The Matrix ◽  
Carbon Martensite

Hardfacing is one of the most useful and economical ways to improve the performance of components submitted to severe wear conditions. In this paper, a new kind of alloy called Fe-Cr-C-Nb/Ti alloy system for wear resistant successfully with the shielded metal arc welding (SMAW) method has been studied. The microstructure and wear resistant of hardfacing alloys reinforced with primary carbides were compared in this study. Meanwhile, the average hardness, the abrasion weight loss and microstructure of deposited metal were systematically studied by optical microscopy, scanning electronic microscopy and energy dispersive spectrum analysis. The results showed that the microstructure of the best optimizing hardfacing layer was the mixed martensite and little retained austenite, and NbC/TiC particles distributing dispersively in the matrix. The amount of low-carbon martensite and high-carbon martensite was identical. The alloy system showed high wear resistance due to the formation of dispersed MC type carbides and good toughness due to the exist of low carbon martensite in the matrix. The hardfacing alloy reinforced with complex carbides was also investigated, the microstructure was analyzed and its hardness and wear resistance were evaluated. In conclusion, the distribution, the chemical composition and the amount of the carbides, as well as the matrix microstructure are all factors to influence the crack resistance, hardness and wear resistance of the hardfacing alloys.

Effect of cooling rate on microstructure and mechanical properties of a low-carbon low-alloy steel

2020 ◽  
Vol 56 (5) ◽  
pp. 3995-4005
Author(s):  
Guofang Liang ◽  
Qiyang Tan ◽  
Yingang Liu ◽  
Tao Wu ◽  
Xianliang Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Alloy Steel ◽  
Low Carbon ◽  
Low Alloy Steel ◽  
Microstructure And Mechanical Properties

scholarly journals Mechanical Properties and Corrosion Resistance of SA508-4 Low Carbon Alloy Steel

2013 ◽  
Vol 81 (4) ◽  
pp. 262-268 ◽  
Author(s):  
Dahai XIA ◽  
Chao ZHOU ◽  
Yuhuan LIU ◽  
Jihui WANG ◽  
Congwei FU ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Alloy Steel ◽  
Low Carbon ◽  
Mechanical Properties And Corrosion
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