Development of Two-Step Softening Heat Treatment for Manufacturing 12Cr-ODS Ferritic Steel Tubes

2004 ◽  
Vol 41 (10) ◽  
pp. 1008-1012 ◽  
Author(s):  
Takeshi NARITA ◽  
Shigeharu UKAI ◽  
Takeji KAITO ◽  
Satoshi OHTSUKA ◽  
Toshimi KOBAYASHI
Keyword(s):  
Heat Treatment ◽  
Ferritic Steel ◽  
Steel Tubes ◽  
Softening Heat

Optimization of post-weld heat treatment condition of arc-welded T91 steel tubes

2020 ◽  
Vol 188 ◽  
pp. 104213
Author(s):  
Ranjeet Kumar ◽  
Anand Varma ◽  
Y. Ravi Kumar ◽  
Himanshu Vashishtha ◽  
Jayant Jain ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Treatment Condition ◽  
Heat Treatment Condition ◽  
Post Weld Heat Treatment ◽  
Steel Tubes ◽  
Weld Heat

Effect of Heat Treatment Conditions on Tube Hydroformability

2005 ◽  
Vol 475-479 ◽  
pp. 4137-4140
Author(s):  
K.S. Park ◽  
B.J. Kim ◽  
Young Hoon Moon
Keyword(s):  
Heat Treatment ◽  
Tube Hydroforming ◽  
Steel Tubes ◽  
Treatment Conditions ◽  
Wide Range ◽  
Engine Cradle ◽  
Secondary Operations ◽  
Complex Structural ◽  
Strength And Stiffness ◽  
Bright Annealing

Tube hydroforming provides a number of advantages over conventional stamping process, including fewer secondary operations, weight reduction, assembly simplification, adaptability to forming of complex structural components and improved structural strength and stiffness. It can produce wide range of products such as sub-frame, engine cradle, and exhaust manifold. In this study, the effect of heat treatment conditions, such as post seam annealing(PSA) and bright annealing(BA), on the ovality and hydro-formability of steel tubes has been investigated. Hydroformability has been estimated as the bulging height obtained depending on the various process parameters such as an internal pressure, axial feeding, and heat treatment conditions. The ovality and forming height were found to strongly depend on material properties after heat treatments.

Hardening mechanism associated with post-firing heat treatment of softening heat treated and then firing simulated Pd-Ag-Au alloy for bonding porcelain

2015 ◽  
Vol 42 (2) ◽  
pp. 95 ◽  
Author(s):  
Sung-Min Kim ◽  
Young-Jun Yu ◽  
Mi-Hyang Cho ◽  
Yong-Hoon Kwon ◽  
Hyung-Il Kim ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Hardening Mechanism ◽  
Heat Treated ◽  
Softening Heat

Effect of Temperature and Cooling Rate on the Microstructures of 35MnB and 25Mn Tubes during Heat Treatment

2016 ◽  
Vol 866 ◽  
pp. 196-200
Author(s):  
Sun Ho Jung ◽  
S. Lee ◽  
J. Lee
Keyword(s):  
Heat Treatment ◽  
Cooling Rate ◽  
Process Condition ◽  
Effect Of Temperature ◽  
Process Conditions ◽  
Optimal Process ◽  
Steel Tubes ◽  
Band Structures ◽  
Mechanical Quality

Band structures with pearlite and ferrite aligned as stripes can be created during the heat treatment of carbon steel. Since band structures undermine the mechanical quality of end products, it is highly important to select a process condition that will not create band structures as a result of heat treatment. This study verified the effect of temperature and cooling rate on the creation of band structures during heat treatment of 35MnB and 25Mn steel tubes for drive shafts and also considered the optimal process conditions to remove band structures or prevent their creation. The experimental results suggest that, during heat treatment of 35MnB and 25Mn steel tubes, it is most effective to ensure a cooling rate faster than furnace cooling in order to prevent band structures.

Experience of high chromium ferritic steel tubes in power plant

1982 ◽  
Vol 4 (2) ◽  
pp. 99-109 ◽  
Author(s):  
T. Yukitoshi ◽  
K. Yoshikawa ◽  
T. Daikoku ◽  
F. Masuyama
Keyword(s):  
Power Plant ◽  
Ferritic Steel ◽  
Steel Tubes ◽  
High Chromium

scholarly journals INFLUENCE OF CARBON CONTENT ON FATIGUE STRENGTH OF DRAWN STEEL TUBES FOR SMALL ONCE-THROUGH BOILER

2012 ◽  
Vol 06 ◽  
pp. 361-366
Author(s):  
DAISUKE YONEKURA ◽  
YUTA FUJIE ◽  
RI-ICHI MURAKAMI ◽  
YUKIHIRO TOKUNAGA
Keyword(s):  
Heat Treatment ◽  
Fatigue Strength ◽  
Carbon Content ◽  
Steel Tube ◽  
Fatigue Tests ◽  
Fatigue Properties ◽  
Post Heat Treatment ◽  
Steel Tubes ◽  
Heat Treated ◽  
The Difference

Tension-tension fatigue tests were performed to examine the influence of carbon content on the fatigue properties of drawn specific steel tube (STB340) with/without post heat treatment for small once-through boiler. Two different carbon content steel tubes, C =0.06 and 0.12% were prepared. The as-received, as-drawn and post drawing heat treated series for each carbon content tube were prepared for fatigue test. The hardness, grain size and residual stress were measured for each series. As a result, the fatigue strength of as-received and as-drawn series showed a small difference between C =0.06 and 0.12% specimens. However, the post drawing heat treatment series showed obvious difference in the fatigue strength. The fatigue strength of higher carbon content tubes significantly decreased by the post drawing heat treatment, whereas the decrease of fatigue strength was little for lower carbon content heat treated tubes. The difference of fatigue strength was mainly caused by the degree of relaxation of work hardening by post heat treatment.

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