Studies on slag deposit formation in pulverized-coal combustors. 4. Comparison of sticking behaviour of minerals and low-temperature and ASTM high-temperature coal ash on medium carbon steel substrates

The purpose of this investigation is to test the laser cladding of different alloy powders onto 1045 medium-carbon steel substrates for parts remanufacturing. The types of alloy powder, laser output powers, and scanning speeds are selected as influencing factors to conduct laser cladding experiments with orthogonal design on the carbon steel 1045 substrate. Bonding shear strength and microhardness of the cladding layer and the substrate are tested and analyzed. The high resolution scanning electron microscopy and energy dispersive X-ray spectroscopy are also used to analyze cladding layers, microstructures, and elements. The experimental results show that a good metallurgical bond is formed between the cladding layer and the substrate without porous cracks and other defects. Shear stress intensity of nickel-based powder is two to three times higher than that of substrate material, while iron-based powder is five times higher than the substrate material. The type of the powder is the most significant factor and laser power is the least. The hardness of outer cladding layer is higher than that of bonding section and inner section. In the heat-affected zone, hardness is higher than that of the substrate material.

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Neutron diffraction study of the kinetics of low-temperature martensite decomposition in medium-carbon steel

Perspektivnye Materialy ◽

10.30791/1028-978x-2021-6-83-87 ◽

2021 ◽

Vol 6 ◽

pp. 83-87

Author(s):

A. A. Alekseev ◽

◽

S. S. Goncharov ◽

Keyword(s):

Solid Solution ◽

Carbon Steel ◽

Low Temperature ◽

Neutron Diffraction ◽

Supersaturated Solid Solution ◽

Medium Carbon Steel ◽

Tempering Temperature ◽

Medium Carbon ◽

Temperature Decomposition ◽

Two Stages

It is found that the low-temperature decomposition of martensite in quenched medium-carbon steel occurs in two stages. In the first stage, the rate of decomposition is higher than that in the subsequent stage. Application of the neutron diffraction method allows the identification of two stages of transformation in the first stage of martensite decomposition. It is shown that the first stage is associated predominantly with carbon segregation at dislocations, and the second, with the outdiffusion of carbon from the supersaturated solid solution with the formation of dispersed particles of metastable carbides. It is shown that the change in the concentration of carbon and, accordingly, the degree of tetragonal lattice of martensite at aging and low tempering occurs to a certain limit, independent of the cooling rate during quenching and tempering temperature. This is due to the establishment of a relative equilibrium between a supersaturated solid solution and fine particles of metastable iron carbide. It is found that the determining process, which leads to a change in the microhardness the low-temperature decomposition, is the out diffusion of carbon from the supersaturated solid solution.

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Microstructure control of medium carbon steel joints by low-temperature linear friction welding

Science and Technology of Welding & Joining ◽

10.1080/13621718.2019.1600771 ◽

2019 ◽

Vol 25 (1) ◽

pp. 1-9 ◽

Cited By ~ 5

Author(s):

Ryosuke Kuroiwa ◽

Huihong Liu ◽

Yasuhiro Aoki ◽

Sungook Yoon ◽

Hidetoshi Fujii ◽

...

Keyword(s):

Carbon Steel ◽

Low Temperature ◽

Friction Welding ◽

Medium Carbon Steel ◽

Linear Friction Welding ◽

Microstructure Control ◽

Medium Carbon ◽

Linear Friction ◽

Steel Joints

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Variation of tensile strength and elastic limit due to tempering at low temperature on quenched medium carbon steel

Transactions of the JSME (in Japanese) ◽

10.1299/transjsme.21-00082 ◽

2021 ◽

Author(s):

Junzo SHIMBE ◽

Masayoshi KUMAGAI ◽

Akihiro TANABE ◽

Yuta MIZUNO

Keyword(s):

Tensile Strength ◽

Carbon Steel ◽

Low Temperature ◽

Elastic Limit ◽

Medium Carbon Steel ◽

Medium Carbon

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UNILOY 14 HV

Alloy Digest ◽

10.31399/asm.ad.sa0241 ◽

1969 ◽

Vol 18 (7) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

High Temperature ◽

Carbon Steel ◽

Physical Properties ◽

Tensile Properties ◽

Heat Treating ◽

Medium Carbon Steel ◽

Medium Carbon ◽

Structural Parts

Abstract UNILOY-14HV is a low-alloy, medium carbon steel recommended for high temperature applications for bolting and structural parts at temperatures up to 1000 F. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-241. Producer or source: Cyclops Corporation.

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STANDARD ALLOY HR-6

Alloy Digest ◽

10.31399/asm.ad.ss0018 ◽

1954 ◽

Vol 3 (9) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

High Temperature ◽

Carbon Steel ◽

Heat Treating ◽

Medium Carbon Steel ◽

Medium Carbon ◽

High Chromium ◽

Temperature Performance ◽

Standard Alloy

Abstract STANDARD HR-6 is a high chromium-nickel, medium carbon steel of high corrosion and heat resistance. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-18. Producer or source: Standard Alloy Company Inc..

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