scholarly journals Cryogenic Hardening of EN 19 Alloy Steel

2019 ◽  
Vol 8 (10) ◽  
pp. 158-161
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Treatment Process ◽  
Cryogenic Treatment ◽  
Heat Treatment Process ◽  
Wear Protection ◽  
Hardening Process ◽  
Alloy Steels ◽  
Increase Wear Resistance ◽  
The Impact

This paper includes the study of heat treatment process that we carried out on En 19 steel in cryogenic atmosphere. Cryogenic treatments of alloy steels have been significantly increase wear resistance and toughness. These investigations of warmth treatment cryogenic medicines of amalgam steels have been asserted to altogether expand wear protection and sturdiness. Cryogenic handling is a supplementary procedure to customary warmth treatment process in steels. The cryogenic treatment on apparatus materials builds the life of instruments, gear, parts and materials by boosting elasticity, sturdiness and strength. This cryogenic hardening process is an onetime treatment influencing the whole part — not only the surface. Cryogenic treatment has been broadly embraced as a cost decrease and execution upgrading innovation. Cryogenic treatment is likewise utilized as an empowering innovation, when its pressure alleviating benefits are used to allow the manufacture (or machining) of basic resistance parts. With regards to great outcomes about the use of profound cryogenic treatment (DCT) on materials, the impact on the microstructure and properties (hardness, strength and the substance of held austenite) are observed to be made strides. Cryogenic treatment has been distinguished to improve the properties of Tools steels. It is discovered that cryogenic treatment confers almost 110% change in apparatus life.

scholarly journals Effect of Heat Treatment on the Microstructure and Properties of Ultrafine WC–Co Cemented Carbide

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1302
Author(s):  
Zhongnan Xiang ◽  
Zhanjiang Li ◽  
Fa Chang ◽  
Pinqiang Dai
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Service Life ◽  
Treatment Process ◽  
Cutting Conditions ◽  
Cemented Carbide ◽  
Cemented Carbides ◽  
Heat Treatment Process ◽  
Microstructure And Properties ◽  
Ultrafine Grained

In this paper, the effect of heat treatment on the microstructure and properties of a 0.8 μm WC–10%Co ultrafine cemented carbide was studied. The results show that the microstructural differences in ultrafine WC–Co cemented carbides without and with heat treatment are mainly reflected in the Co phase. For conventional cemented carbides, the hardness and wear resistance can be increased only at the expense of the toughness and strength. An ultrafine-grained WC–Co cemented carbide with good hardness and toughness can be obtained by strengthening the Co phase through an appropriate heat treatment process, and the service life of the ultrafine-grained WC–Co cemented carbide can be improved under actual cutting conditions.

Infiltration Casting and In Situ Fabrication of (Fe,Cr)7C3 Particulates Bundle – Reinforced Iron Matrix Composites

2011 ◽  
Vol 284-286 ◽  
pp. 273-276
Author(s):  
Li Sheng Zhong ◽  
Yun Hua Xu ◽  
Xin Cheng Liu ◽  
Fang Xia Ye ◽  
Jing Lai Tian ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Cast Iron ◽  
Phase Analysis ◽  
Matrix Composite ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Matrix Composites ◽  
Iron Matrix

The method of infiltration casting plus heat treatment process employing chromium wires and cast iron applied to in-situ synthesized (Fe,Cr)7C3 particulates bundle reinforced iron matrix composites. The phase analysis, microstructure, microhardness and wear-resistance of composite were observed and measured. The results show that it is possible to fabricate (Fe,Cr)7C3 particulates bundle reinforced iron matrix composite produced by this technology, and a special structure which called particulates bundle was fabricated. (Fe,Cr)7C3 particulates bundle were distributed in the forms of granular, lath-shaped and hexagon-shaped in the particulates bundle. The macrohardness of particulates bundle was 52 HRC, and the relative wear resistance of the composites is 2.3—23 times higher than that of the cast iron.

Mechanical Properties of SiC/Gr Reinforced Hybrid Aluminum Composites after Heat Treatment

2021 ◽  
Vol 1042 ◽  
pp. 111-115
Author(s):  
Dwi Rahmalina ◽  
Hendri Sukma ◽  
Abdul Rokhim ◽  
Amin Suhadi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Matrix Composite ◽  
Treatment Process ◽  
Solution Treatment ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Heat Treatment Process ◽  
Matrix Composites ◽  
The Impact

Metal matrix composite has been developed to improve mechanical properties for the automotive component application. One crucial factor in achieving excellent mechanical properties is improving the properties of the aluminum matrix of composite by the heat treatment process. The mechanical properties of Al-Mg-Si matrix composites alloyed with Zn and reinforced with 5% SiC and 5%Gr particle were examined after the heat treatment process. The aluminum matrix is melted inside the crucible furnace at 850 °C and is added with SiC/Gr particle, followed by stirring at 7500 rpm to optimize the mixing of the composite. Then, the composite is poured into the preheated mold at 300 °C and then squeezed with 30 MPa of pressure. The heat treatment process consists of three steps; solution treatment, quenching, and artificial aging. The aging process is conducted with variation of temperature (140 °C, 180 °C and 200 °C) and holding time (2, 4, and 6 hours). The test results show that the mechanical properties of aluminum matrix composite tend to increase after the heat treatment process. The optimum mechanical properties are achieved at the aging temperature of 200 °C for 6 hours, with the hardness value of 60.3 HRA and the impact value of 0.112 Joule/mm2.

Contrast of Wear Resistance between X80CrVMo13-2 Cutting Steel and 4Cr13 in Different Heat Treatment Condition

2013 ◽  
Vol 648 ◽  
pp. 50-54
Author(s):  
Chun Yan Wang ◽  
Hong Sheng Ding ◽  
Zhi Fang Cheng ◽  
Li Geng Zhao
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Treatment Condition ◽  
Treatment Process ◽  
Heat Treatment Condition ◽  
Deformation Resistance ◽  
High Wear Resistance ◽  
Heat Treatment Process ◽  
Meat Processing ◽  
Cutting Steel

Cutting steel is required to have high wear resistance with certain hardness and deformation resistance. The commonly used machinery material for meat processing in china is 4Cr13, which is far inferior to the imported German steel X80CrVMo13-2. After studying the influence of different heat treatment process on its wear resistance, we have come to the following conclusion: X80CrVMo13-2 steel, after quenched at 1050°C and tempered at 500°C, has an excellent wear resistance and 4Cr13 steel, after normalized at 1010°C and tempered at 500°C has a fairly good wear resistance.

scholarly journals Peningkatan Nilai Impak Baja Hadfield Mn 12 Melalui Proses Perlakuan Panas Homogenisasi Bertahap

2018 ◽  
Vol 1 (02) ◽  
pp. 09-14
Author(s):  
Ery Hidayat ◽  
Beny Bandanadjaja
Keyword(s):  
Heat Treatment ◽  
Treatment Process ◽  
Solution Treatment ◽  
Rapid Quenching ◽  
Manganese Steel ◽  
Heat Treatment Process ◽  
Austenitizing Temperature ◽  
Slow Cooling ◽  
The Impact ◽  
Impact Sample

Hadfield manganese steel is the steel with a composition of 1.0-1.4% C and 10-14% Mn, where the C: Mn ratio is made at 1:10. In as-cast conditions, the steel has a structure of carbide (Fe, Mn) 3C at the grain boundary, formed during slow cooling in the sand mold. The carbide existence can cause brittle properties of the material and needs to be eliminated by a heat treatment process that is homogenization (or solution treatment). In this study, a stepped heat treatment process was carried out by giving preheating at temperatures below the austenitizing temperature of 600 oC and 700 oC. The austenitizing temperature is given lower than the conventional method which usually uses 1050 oC, wherein this study austenitizing heating was given at 980 oC. Rapid quenching is performed using water with agitation or stirring to ensure that the cooling rate is fast enough to generate a 100% austenite structure. The results achieved that the sample with a stepped heat treatment process with a preheating temperature of 600 oC and followed by austenitizing of 980 oC could perform finer austenite grains, with the highest impact value of 255 Joules. A fracture of the impact sample resulting very ductile behavior which can be seen that the impact sample is not completely broken.

Influence of Heat Treatment on the Microstructure and Properties of 7Cr17Mo Martensitic Stainless Steel

2013 ◽  
Vol 820 ◽  
pp. 15-19
Author(s):  
Xiao Dong Du ◽  
Zi Li Song ◽  
Yi Qing Chen ◽  
Jia Qing Wang ◽  
Guang Fu Liu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Retained Austenite ◽  
Treatment Process ◽  
Martensitic Stainless Steel ◽  
Optical Microscope ◽  
Heat Treatment Process ◽  
Quenching Temperature ◽  
Microstructure And Properties ◽  
The Impact

This paper describes the influence of heat treatment process on the microstructure and properties of a new martensitic stainless steel, which contains 0.7% carbon, 17% chromium and 1% molybdenum and can be used as kitchen knives and scissors. The microstructure and properties of the tested alloys after quenching at 980 - 1100 °C and low tempering were investigated by means of optical microscope (OM), scanning electron microscope (SEM), Rockwell hardness tester and impact tester. The results show that the microstructure consists of acicular martensite, carbides and a litter retained austenite after quenching and tempering. The carbides are mainly (Fe,Cr)23C6. The content of retained austenite increases with the increase of the quenching temperature. The solubility of carbon in martensite changes similarly. The martensite gets coarser as the quenching temperature increasing. The maximum value of hardness is 59 HRC, when the quenching temperature is 1060 °C. The impact toughness increases when the quenching temperature increases from 980 °C to 1080 °C and then decreases. The suitable heat treatment process for this alloy is quenching at 1060 °C~1080 °C for 30 min and then tempering at 200°C.

Effects of Heat Treatment Process on Microstructure and Mechanical Properties of 31Mn2SiREB Cast Steel

2013 ◽  
Vol 762 ◽  
pp. 418-423
Author(s):  
Feng Zhang Ren ◽  
Feng Jun Li ◽  
Ling Bai ◽  
Yun Fei Wang
Keyword(s):  
Heat Treatment ◽  
Impact Energy ◽  
Treatment Process ◽  
Cast Steel ◽  
Diffusion Annealing ◽  
Heat Treatment Process ◽  
Micro Hardness ◽  
Quenching Temperature ◽  
Pre Treatment ◽  
The Impact

The heat treatment process of 31Mn2SiREB cast steel used in crawler shoes is directly lifted from the heat treatment process of Mn13 high-manganese cast steel, i. e., quenching at 1050 oC after casting. The reasonableness of the process needs to be surveyed. In this paper, the effects of quenching temperature and diffusion annealing pre-treatment on mechanical properties, micro-area composition uniformity and micro-hardness uniformity were investigated. For quenching after casting, the tensile strength and impact energy increase observably with the elevation of quenching temperature, but the impact energy at higher quenching temperature is still very small. The fluctuation of micro-hardness and chemical composition at different micro-areas becomes obviously small with the increase of quenching temperature. For quenching after a diffusion annealing pre-treatment, the impact energy is very high and up to 36.3 J.

Study on Improving Cutting Tools Lifespan of W6Mo5Cr4V2 High-Speed Steel

2010 ◽  
Vol 139-141 ◽  
pp. 344-347
Author(s):  
Guang Ming Li ◽  
Li Yan ◽  
Shu Min Yu
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
High Speed ◽  
Treatment Process ◽  
Cutting Tools ◽  
High Speed Steel ◽  
Heat Treatment Process ◽  
Waste Energy ◽  
New Treatment ◽  
Steel Heat

This paper mainly discusses the technique of using quenching at 1000°C and tempering at 650°C for 2 hours to replace the heat treatment process of quenching at 1225°C and tempering at 560°C for 1 hour for three times.Due to the old heat treatment process is traditional multifarious waste energy and relatively backward.The experiment results prove that after the new treatment using the W6Mo5Cr4V2 high-speed steel to make cutting tools such as cutters, drill, taps and so on. It aslo achieves better abrasion resistance and ductility. This meeting the objective of improving the wear resistance, toughness, lifespan enhancement and energy conservation.It opens up a new way of simple and energy saving for W6Mo5Cr4V2 high-speed steel heat treatment process.The material of W6Mo5Cr4V2 high-speed steel has certain value to research.

Influence of Heat Treatment Process on the Structures and Properties of Grate Bars Used in Sintering Trolley

2014 ◽  
Vol 697 ◽  
pp. 95-101
Author(s):  
An Min Li ◽  
Ding Ma ◽  
Qi Feng Zheng ◽  
Ruo Huai Chen ◽  
Zu Jiang Huang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Treatment Process ◽  
The Other ◽  
Air Cooling ◽  
Heat Treatment Process ◽  
Eutectic Carbide ◽  
Maximum Hardness ◽  
Quenching Temperature ◽  
Structures And Properties

The as-cast structure of grate bar used in sintering trolley is primarily comprised of austenite and eutectic (eutectic austenite and eutectic carbide). The austenite is dendrite, while the carbide is reticular and chrysanthemum-like. The grate bars were quenched and tempered under various temperature (one set of samples: quenching (975~1050°C); the other: quenching (1000°C) + tempering (240~600°C)). With rise in quenching temperature, the content of martensite increases and gradually stabilizes, and the hardness increases and then decreases (the maximum is 61.5HRC). For the tempered simple, the strip-like carbides gradually become smaller, shorter and homogenized; the resistance to temper softening is high and the maximum hardness is 58HRC; the wear resistance gradually decreases and is lower than that of as-cast one when the temperature is higher than 480°C. The heat treatment process to improve the service properties of grate bars is: quenching (1000°C, 2.5h, and air-cooling) + tempering (300~420°C, 2.5h, and air-cooling).

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