Effect of calcium treatment on hot workability of Cr–Ni–0·7N stainless steel

1990 ◽  
Vol 6 (8) ◽  
pp. 743-748 ◽  
Author(s):  
K. Mineura ◽  
K. Tanaka
Keyword(s):  
Stainless Steel ◽  
Hot Workability ◽  
Calcium Treatment

Thermodynamics and transient behavior of the inclusion in Si deoxidized stainless steel for high-grade plate

2019 ◽  
Vol 116 (6) ◽  
pp. 612
Author(s):  
Wanlin Wang ◽  
Liwen Xue ◽  
Tongsheng Zhang ◽  
Lejun Zhou ◽  
Daoyuan Huang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Energy Dispersive Spectrometer ◽  
Transient Behavior ◽  
Field Energy ◽  
Liquid Region ◽  
High Grade ◽  
Calcium Treatment ◽  
Solidification Temperature ◽  
Inclusions In Steel

The experiments were carried out to determine the transient behavior of the inclusion in Si-deoxidized stainless steel for high-grade plate. The samples were taken from three heats of the steel during the whole production process from the AOD to the mold, which were subsequently examined by an automatic scanning electron microscope with field energy dispersive spectrometer (FE-SEM&EDS). It can be summarized that appropriate calcium treatment intensity could modify inclusions into liquid ones. Excessive calcium treatment above ([Ca] = 25 ppm) will increase the melting point of the inclusions, which cannot keep in the liquid region at the solidification temperature. Therefore, the calcium addition in Si-deoxidized stainless steels should be controlled to a relatively lower value ([Ca] = 10 ppm). In addition, the content of aluminum in steel also has an important influence on the control of inclusion. When the content of aluminum ([Al] = 0.012%) is too high, the inclusions in steel are difficult to be controlled within the liquid phase. The chemical evolution of the inclusions in steel at high temperature and during solidification process were comprehensively calculated, considering all types of inclusions such as calcium oxide, aluminum oxide, silicon oxide, calcium aluminate, calcium silicate, mullite, and liquid inclusion. The thermodynamic calculations are in good agreement with experimental results, which can predict the formation of the inclusions in Si-deoxidized stainless steels.

The influence of delta ferrite in the AISI 416 stainless steel hot workability

2003 ◽  
Vol 351 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
P.H.S Cardoso ◽  
C Kwietniewski ◽  
J.P Porto ◽  
A Reguly ◽  
T.R Strohaecker
Keyword(s):  
Stainless Steel ◽  
Hot Workability ◽  
Delta Ferrite

The Hot Workability of CromaniteTM, a High Nitrogen Austenitic Stainless Steel

1999 ◽  
Vol 318-320 ◽  
pp. 777-784 ◽  
Author(s):  
J.N. Tarboton ◽  
L.M. Matthews ◽  
A. Sutcliffe ◽  
C.M.P. Frost ◽  
J.P. Wessels
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Hot Workability ◽  
High Nitrogen

Effect of strain rate and temperature on hot workability and flow behaviour of duplex stainless steel

2016 ◽  
Vol 43 (2) ◽  
pp. 88-96 ◽  
Author(s):  
M. Ma ◽  
H. Ding ◽  
Z. Tang ◽  
J. Zhao ◽  
Z. Jiang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Strain Rate ◽  
Duplex Stainless Steel ◽  
Flow Behaviour ◽  
Hot Workability

Evolution behaviour of nonmetallic inclusions in Ti-bearing 11Cr stainless steel with calcium treatment

2019 ◽  
Vol 47 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Jingyu Li ◽  
Guoguang Cheng ◽  
Qiang Ruan ◽  
Jixiang Pan ◽  
Xingrun Chen
Keyword(s):  
Stainless Steel ◽  
Nonmetallic Inclusions ◽  
Calcium Treatment

NITRONIC 20

Alloy Digest ◽  
1981 ◽  
Vol 30 (2) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Mechanical Strength ◽  
Heat Treating ◽  
Hot Workability ◽  
Cold Forming ◽  
High Mechanical Strength ◽  
Ambient Temperatures ◽  
Temperature Performance ◽  
Resistance To Oxidation

Abstract Nitronic 20 was designed for elevated-temperature use where high mechanical strength and resistance to oxidation and sulfidation are important. This stainless steel exhibits high mechanical strength throughout the 1000-1700 F (538-927 C) temperature range, yet it is malleable at forging temperatures and provides excellent hot workability. Nitronic 20 also retains ductility and ambient temperatures; this permits working or shaping by many conventional cold-forming processes. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and machining. Filing Code: SS-381. Producer or source: Armco Inc., Stainless Steel Division.

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