scholarly journals Some Torque-Twist Relations on the Low Temperature Dynamic Torsion Test of Low Carbon Steel

1963 ◽  
Vol 12 (117) ◽  
pp. 457-463 ◽  
Author(s):  
Genjiro MIMA ◽  
Shigenori HORI ◽  
Kanji MATSUI
Keyword(s):  
Carbon Steel ◽  
Low Temperature ◽  
Low Carbon Steel ◽  
Torsion Test ◽  
Low Carbon ◽  
Dynamic Torsion ◽  
Temperature Dynamic

Factors Influencing Dephosphorization of Low Carbon Steel in Converter

2021 ◽  
Vol 1047 ◽  
pp. 111-119
Author(s):  
Zhao Liu ◽  
Shu Sen Cheng ◽  
Liang Wang
Keyword(s):  
Carbon Steel ◽  
Low Temperature ◽  
Slag Composition ◽  
Phosphorus Content ◽  
Low Carbon Steel ◽  
Smelting Process ◽  
Low Carbon ◽  
Factors Influencing ◽  
High Basicity ◽  
Metal Yield

A 300-metric ton converter in a steel plant in China was studied. The influence of factors such as slag composition and temperature in the smelting process on the dephosphorization effect was statistically analyzed. The dephosphorization ability of slag increased firstly and then decreased with the increase of temperature, basicity and FeO content. Low-temperature, high-basicity and high-oxidizing slag are thermodynamically beneficial to promote the dephosphorization reaction, but the basicity is higher than 4.0, and the temperature is higher than 1640 °C are not conducive to the slag to obtain better fluidity. At the same time, too high FeO content will increase the activity coefficient of P2O5, thereby increasing its activity, which is not conducive to the progress of the dephosphorization reaction. As the end point content of carbon decreases, the oxygen content increases and the phosphorus content decreases. A very low carbon content is not conducive to metal yield and temperature control.

scholarly journals An answer to the carbon cluster in low-temperature aged ferritic low-carbon steel

2020 ◽  
Vol 159 ◽  
pp. 110006 ◽  
Author(s):  
Takuya Maeda ◽  
Yasuhito Kawahara ◽  
Keisuke Kinoshita ◽  
Hideaki Sawada ◽  
Jun Takahashi ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Low Temperature ◽  
Low Carbon Steel ◽  
Carbon Cluster ◽  
Low Carbon

Fine structure of low-carbon steel after electrolytic plasma treatment

2021 ◽  
Vol 63 (9) ◽  
pp. 842-847
Author(s):  
Lyaila Bayatanova ◽  
Bauyrzhan Rakhadilov ◽  
Sherzod Kurbanbekov ◽  
Мazhyn Skakov ◽  
Natalya Popova
Keyword(s):  
Carbon Steel ◽  
Low Temperature ◽  
Transition Layer ◽  
Low Carbon Steel ◽  
Residual Austenite ◽  
Low Carbon ◽  
Tempered Martensite ◽  
Quantitative Estimates ◽  
Steel Layer ◽  
Lamellar Cementite

Abstract This work shows the results of research of the fine and dislocation structure of the transition layer of 18CrNi3Mo low-carbon steel after the influence of electrolytic plasma. Conducted research has shown that the modified steel layer, as a result of carbonitriding, was multiphase. Quantitative estimates were made for carbonitride М23(С,N)6 in various morphological components of α-martensite and on average by material in the transition layer of nitro-cemented steel. It was established that α-phase is tempered martensite after nitrocementation. Released martensite is represented by batch, or lath and lamellar low-temperature and high-temperature martensite. Inside the tempered martensitic crystals, lamellar cementite precipitates are simultaneously present, and residual austenite is found along the boundaries of the martensitic rails and plates of low-temperature martensite. It was determined that inside the crystals of all morphological components of α-martensite there are particles of carbonitride М23(С,N)6.

Low-temperature bainite in low-carbon steel

2014 ◽  
Vol 594 ◽  
pp. 344-351 ◽  
Author(s):  
X.Y. Long ◽  
F.C. Zhang ◽  
J. Kang ◽  
B. Lv ◽  
X.B. Shi
Keyword(s):  
Carbon Steel ◽  
Low Temperature ◽  
Low Carbon Steel ◽  
Low Carbon

scholarly journals Karakterisasi Ketahanan Lelah Takik Ulir Whitworth Akibat Pembebanan Puntir Dinamis pada Baja Karbon Rendah

2020 ◽  
Vol 5 (2) ◽  
pp. 154-162
Author(s):  
A Hasan Atho’ullah ◽  
Heri Yudiono
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
Initial Crack ◽  
Group Comparison ◽  
Low Carbon ◽  
Notch Depth ◽  
Intact Group ◽  
Dynamic Torsion

This study aims to analyze Whitworth thread's fatigue characterization due to dynamic twisting on low carbon steel. The research method uses experiments with pre-experimental design with the form of intact group comparison. The experimental group was specimens with Whitworth thread notch depth of 0.67 mm, 0.81 mm, and 1.16 mm. The control group was Whitworth threads with a notch depth of 0.9 mm. The study used low carbon steel with a carbon content of 0.12% wt. The dynamic torsion testing with a twisting angle of 5 reveals that the deeper the Whitworth thread notch, the lower the fatigue resistance. The fracture surface is visible due to dynamic torsion in the form of initial crack, crack propagation rate, and final crack.Fenomena kegagalan lelah disebabkan oleh pola pembebanan dan bentuk takikan. Pola pembebanan terjadi karena puntir lentur dan puntir dinamis. Bentuk takikan diperlukan karena tuntutan desain, salah satunya adalah takik ulir whitworth. Penelitian ini bertujuan untuk menganalisis karakterisasi ketahanan lelah ulir whitworth akibat pembebanan puntir dinamis pada baja karbon rendah. Metode penelitian menggunakan eksperimen dengan pre-experimental design dengan bentuk intact-group comparison. Kelompok eksperimen adalah spesimen dengan kedalaman takik ulir whitworth 0.67 mm, 0.81 mm, dan 1.16 mm. Kelompok kontrol dengan kedalaman takik ulir whitworth sebesar  0.9 mm. Penelitian menggunakan baja karbon rendah dengan kandungan karbon sebesar 0.12% wt. Hasil pengujian puntir dinamis mengungkapkan bahwa semakin dalam takik ulir withworth maka ketahanan lelahnya semakin menurun. Bentuk penampang patah akibat pembebanan puntir dinamis berupa initial crack, crack propagation rate dan final crack.

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