scholarly journals Influence of Heat Treatment on Hot-rolled Sheet Forming of Ti–6Al–4V Alloy

2015 ◽  
Author(s):  
Huan-Huan Yu ◽  
Zhuang Li ◽  
Zu-Hua Bao ◽  
Shao-Pu Kang
Keyword(s):  
Heat Treatment ◽  
Sheet Forming ◽  
Rolled Sheet ◽  
Hot Rolled

Influence of Thermal Cyclic Deformation and Hardening Heat Treatment on the Structure and Properties of Steel 10

2015 ◽  
Vol 788 ◽  
pp. 187-193 ◽  
Author(s):  
Aleksandr Prudnikov ◽  
Marina Popova ◽  
Vladimir Prudnikov
Keyword(s):  
Heat Treatment ◽  
Cyclic Deformation ◽  
Sheet Steel ◽  
Strength Characteristics ◽  
Rolled Sheet ◽  
Structure And Properties ◽  
Fine Grained ◽  
Fine Grained Structure ◽  
Hot Rolled ◽  
Hardening Heat Treatment

The results of the influence of preliminary thermal cyclic deformation and subsequent hardening heat treatment on the microstructure and mechanical properties of hot-rolled sheet steel 10 are presented. It is shown that the use of preliminary thermal cyclic deformation of the steel 10 stock material results in a fine-grained structure of a hot-rolled sheet (3 mm thick) produced by an industrial technology. Deformation occurred at a temperature above AC3 (1250 °C), with cooling to 200-300 °C during 10 cycles and the deformation ratio per cycle being 6-8 %. Such a treatment before sheet hot-rolling allows increasing the strength characteristics (tensile strength, yield strength) by almost 30 %. It has been established that the use of subsequent heat treatment (quenching, 900 °C, water and tempering 1 h, 600 °C) leads to a further increase in strength characteristics by 15-20% while maintaining a sufficient level of ductility of sheet steel.

scholarly journals Effect of Carbonitride Precipitates on the Corrosion Resistance of Low-Alloy Steels under Operating Conditions of Oil-Field Pipelines

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 766
Author(s):  
Irina Rodionova ◽  
Andrey Amezhnov ◽  
Ekaterina Alekseeva ◽  
Yuliya Gladchenkova ◽  
Irina Vasechkina
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Operating Conditions ◽  
Oil Field ◽  
Rolled Sheet ◽  
Low Alloy Steels ◽  
Alloy Steels ◽  
Sheet Products ◽  
Microalloying Elements ◽  
Hot Rolled

An investigation into the corrosion resistance of steels with various contents of carbon and microalloying elements was carried out. It was shown that the presence of a large amount of nanosized (2–3 nm and less) precipitates of the interphase type, particularly niobium carbonitride and vanadium carbonitride, leads to a decrease in the corrosion resistance of hot-rolled sheet products. It was found that, after heat treatment of rolled products at 710 °C, the corrosion resistance of the metal is improved. One of the reasons for this is a decrease in the amount of interphase precipitates, which negatively affect the corrosion resistance of steel, while particles formed in austenite and ferrite do not have such an effect. To ensure high corrosion resistance of steels for oil-field pipelines, microalloying with niobium instead of vanadium is advisable, as well as heat treatment at temperatures above 710 °C.

Effect of High Density Electropulsing Current on Microstructure and Mechanical Properties of Fe-6.5wt.%Si Alloy Sheet

2017 ◽  
Vol 898 ◽  
pp. 1236-1241 ◽  
Author(s):  
Y.Y. Liu ◽  
Y.F. Liang ◽  
S.B. Wen ◽  
Feng Ye ◽  
J.P. Lin
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Rolling Process ◽  
High Energy ◽  
Alloy Sheet ◽  
High Density ◽  
Rolled Sheet ◽  
Microstructure And Mechanical Properties ◽  
Conventional Heat Treatment ◽  
Hot Rolled

Fe-6.5wt.%Si alloy is an excellent soft magnetic material. Due to the appearance of ordering structures, the alloy shows poor ambient temperature ductility, and can only be cold rolled by specific rolling process. The rolling process with heat treatment is complex and time consuming. Meanwhile, high-energy electropulsing shows electroplastic effect. Heat treatment effect of the high-density electropulsing on microstructure and mechanical properties were investigated. The hot rolled sheet with 1 mm in thickness could be uniformly recrystallized in 33 s at 690 oC by appropriate high density pulses and the ductility was improved in comparison to the conventional heat treatment in a furnace. After the electropulsing treatment, the hot rolled sheet could be warm rolled by 50% reduction of the thickness after one pass without edge crack.

Network Carbide Inheritance during Heat Treatment Process of Large Shield Machine Bearing Steel GCr15SiMn

2015 ◽  
Vol 817 ◽  
pp. 115-120 ◽  
Author(s):  
Dan Zhang ◽  
Le Yu Zhou ◽  
Chao Lei Zhang ◽  
Chao Huang ◽  
Min Zhao ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Treatment Process ◽  
Bearing Steel ◽  
Treatment Temperature ◽  
Heat Treatment Process ◽  
Soaking Time ◽  
Hot Rolled ◽  
Chinese Standard ◽  
Shield Machine ◽  
Quenching And Tempering

Network carbide inheritance during heat treatment process of large shield machine bearing steel GCr15SiMn was investigated by heat treatment experiments and quantitative metallographic. Samples with the proeutectoid cementite network thickness in the range of 0.19~0.54 μm were obtained by changing austenitizing temperature and soaking time of pearlite transformation. The results show that the network in hot rolled bar can be improved when the pre-heat treatment temperature is 950 °C. When the network thickness is above 0.40 μm, the undissolved cementite networks present in microstructures after quenching and tempering. In a Chinese standard, the network grades are 1.5 and 3.0 degree when the networks thickness are 0.40 μm and 0.54 μm, respectively. The critical network thickness that can be eliminated by heat treatment is 0.29 μm.

scholarly journals KARAKTERISTIK MARSHALL CAMPURAN HOT ROLLED SHEET WEARING COURSE MENGGUNAKAN BAHAN TAMBAH PLASTIK BEKAS JENIS POLYETHYLENE TEREPHTHALATE

2020 ◽  
Vol 19 (3) ◽  
pp. 179-186
Author(s):  
Yusrizal Yahya ◽  
Desriantomy . ◽  
Robby .
Keyword(s):  
Polyethylene Terephthalate ◽  
Optimum Parameter ◽  
Asphalt Mixture ◽  
Rolled Sheet ◽  
Asphalt Content ◽  
Hot Rolled ◽  
Plastic Content ◽  
Mixture Value

Abstract This study was conducted to determine the benefits of the use of polyethylene terephthalate used plastic as additives in hot asphalt mixture Hot Rolled Sheet Wearing Course. Marshall testing was carried out on specimens using polyethylene terephthalate plastic additives, with variations in the ingredients added 2%, 4%, 6%, 8%, and 10% to the weight of asphalt on specimens with Optimum Asphalt Content. Marshall parameters of test specimens generally meet the existing specifications, except the Void In Mixture value for specimens with plastic content of 8% and 10%. The optimum plastic content obtained from this study is 7.80%. Keywords: asphalt mixture, hot rolled sheet, Marshall parameters, polyethylene terephthalate  Abstrak Studi ini dilakukan untuk mengetahui manfaat penggunaan plastik bekas jenis Polyethylene Terephthalate sebagai bahan tambah pada campuran beraspal panas jenis Hot Rolled Sheet Wearing Course. Pengujian Marshall dilakukan terhadap benda-benda uji yang menggunakan bahan tambah plastik jenis Polyethylene Terephthalate, dengan variasi bahan tambah 2%, 4%, 6%, 8%, dan 10% terhadap berat aspal pada benda uji dengan Kadar Aspal Optimum. Parameter Marshall benda-benda uji umumnya memenuhi spesifikasi yang ada, kecuali nilai Void In Mixture untuk benda-benda uji dengan kadar plastik 8% dan 10%. Kadar plastik optimum yang diperoleh dari studi ini adalah 7,80%. Kata-kata kunci: campuran beraspal, hot rolled sheet, parameter Marshall, polyethylene terephthalate

Mechanized line for heat treatment of hot-rolled tubes 30?102

Metallurgist ◽  
1973 ◽  
Vol 17 (2) ◽  
pp. 129-130
Author(s):  
A. Ya. Zelikovich ◽  
O. A. Shcherbina ◽  
V. P. Pavlovskii ◽  
V. I. Krivosheev
Keyword(s):  
Heat Treatment ◽  
Mechanized Line ◽  
Hot Rolled
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