Wear of Thermochemically Produced Nitrogen Stainless Steel

1986 ◽  
Vol 108 (3) ◽  
pp. 334-339 ◽  
Author(s):  
B. F. Campillo Illanes ◽  
A. D. Sarkar
Keyword(s):  
Stainless Steel ◽  
Nitrogen Content ◽  
Stainless Steels ◽  
Martensitic Steel ◽  
Hardened Layer ◽  
Interfacial Shear ◽  
High Carbon ◽  
Heavy Load ◽  
Nitrogen Contents ◽  
Carbon Martensitic Steel

Thermochemically produced stainless steels with varying nitrogen content were slid dry on high carbon martensitic steel counterfaces using a pin bush machine. The running-in wear was high but the steady state wear decreased with increased nitrogen contents of the steels. A work hardened layer formed on the pins, the degree of hardening increasing with the nitrogen content of the steels. The hard pins caused a considerable amount of wear of the bushes, possibly, by ploughing. The pins wore by transfer and oxidation and, by interfacial shear and, probably, brittle fracture of the work hardened layer at a heavy load.

Ultrahigh Ductility, High-Carbon Martensitic Steel

2016 ◽  
Vol 47 (10) ◽  
pp. 4853-4861 ◽  
Author(s):  
Shengwei Qin ◽  
Yu Liu ◽  
Qingguo Hao ◽  
Xunwei Zuo ◽  
Yonghua Rong ◽  
...  
Keyword(s):  
Martensitic Steel ◽  
High Carbon ◽  
Carbon Martensitic Steel

scholarly journals The Effect of Nitrogen Content on Material Properties of High Carbon Stainless Steel SUS440A

1996 ◽  
Vol 82 (4) ◽  
pp. 309-314 ◽  
Author(s):  
Tetsuya SHIMADA ◽  
Akio YAMAMOTO ◽  
Seizaburo ABE
Keyword(s):  
Stainless Steel ◽  
Nitrogen Content ◽  
Material Properties ◽  
High Carbon

Development of Powder Metallurgy High Nitrogen Stainless Steel

2010 ◽  
Vol 638-642 ◽  
pp. 1811-1816 ◽  
Author(s):  
Chun Jiang Kuang ◽  
H. Zhong ◽  
D. Chen ◽  
X. Kuang ◽  
Q. Li ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Nitrogen Content ◽  
Stainless Steels ◽  
High Strength ◽  
Gas Atomization ◽  
High Nitrogen ◽  
Annealed State ◽  
Nitrogen Alloying ◽  
High Nitrogen Stainless Steel

Nitrogen alloying in steel may greatly increase the strength and corrosion resistance of the material. This paper introduced some research results of high nitrogen stainless steel (HNS) investigation via PM process. Nickel free high nitrogen stainless steels (17Cr12Mn2MoN) and superaustenitic high nitrogen stainless steels (28Cr6Mn2/6Mo10/20NiN) were investigated via gas atomization and HIP processes. Nitrogen alloying behavior during atomization and consolidation processes was investigated. Powders with nitrogen content up to 1% were manufactured by gas atomization process. Nickel free high nitrogen stainless steels with nitrogen up to 0.6% exhibits high strength and ductility at as-HIPed and solution annealed state, and superaustenitic HNS with nitrogen content up to 1% showed very high strength and good ductility at solution annealed state, with b at 1100 MPa, s at 810 MPa and elongation of 43%. PM HNS exhibited excellent corrosion resistance.

Research on Powder Metallurgy High Nitrogen Stainless Steels

2013 ◽  
Vol 690-693 ◽  
pp. 172-175
Author(s):  
Da Wei Cui ◽  
Jin Long Wang
Keyword(s):  
Nitrogen Content ◽  
Stainless Steels ◽  
Sintering Temperature ◽  
Austenitic Stainless Steels ◽  
High Energy ◽  
Solution Annealing ◽  
High Nitrogen ◽  
Composite Powders ◽  
Sintering Properties ◽  
Nitrogen Contents

High nitrogen Fe-18Cr-12Mn-3Mo-xN austenitic stainless steels were prepared by mechanical alloying and powder metallurgical pressing-sintering techniques. The microstructures, nitrogen contents and sintering properties of the milled powders and sintered bodies had been also investigated. The results show that high nitrogen and nearly spherical composite powders with good compressibility can be obtained by high-energy vibration ball milling and high temperature nitriding. It is also found that the sintering temperature has a significant effect on the density and the nitrogen content of sintered specimens, and the optimal sintering temperature are determined to be 1250°C, at which a favorable combination of the relative density as high as 97.1% and the final nitrogen content of 0.79wt% in sintered specimens can be obtained. The sintered bodies mainly consist of γ-austenite, α-ferrite and the lamellar Cr2N phase. After solution-annealing at 1150°C for 1.5h followed by water-quenching, high nitrogen austenitic stainless steels reveal a fully austenitic structure.

Type 316l Stainless Steels Exhibiting Five-Fold Symmetry Mo-Rich Phase

1997 ◽  
Vol 3 (S2) ◽  
pp. 685-686
Author(s):  
Yong-Jun Oh ◽  
Woo-Seog Ryu ◽  
Jun-Hwa Hong ◽  
Il-Hiun Kuk
Keyword(s):  
Nitrogen Content ◽  
Stainless Steels ◽  
Aging Treatment ◽  
Rich Phase ◽  
Heat Treated ◽  
Different Types ◽  
Type 316L ◽  
Rapidly Solidified ◽  
Nitrogen Contents ◽  
Initial Results

The existence of phases exhibiting five-fold symmetry patterns has recently been reported for conventional heat treated alloys as well as rapidly solidified alloys. The present paper reports initial results on the analysis of a Mo-rich phase in 316L stainless steel which exhibits this symmetry. The formation and growth of this Mo-rich phase were investigated as a function of aging time. In addition, the effect of nitrogen content on the formation of this five-fold phase was also investigated.The materials investigated were type 316L stainless steels with nitrogen contents of 0.024% and 0.150%. The materials were solution-annealed at 1100 °C for 30 minites followed by an aging treatment at 700 °C for 10–50 hours in a vacuum sealed quartz tube. TEM samples were prepared by conventional twin-jet polishing and carbon replications extracted by use of a bromine-etch.Irrespective of nitrogen content, the grain boundary phases after 50 hours of aging were totally observed as five different types of precipitates; M23C6 and M6C carbides, intermetallic η and χ phases, and the five-fold symmetry phase.

Preparation of Nitrogen-Containing Stainless Steels by Vibration Milling and Cold-Press Sintering

2011 ◽  
Vol 179-180 ◽  
pp. 162-166
Author(s):  
Da Wei Cui
Keyword(s):  
Stainless Steel ◽  
Nitrogen Content ◽  
Ball Milling ◽  
Nitrogen Pressure ◽  
High Energy ◽  
Nitrogen Atmosphere ◽  
Particle Sizes ◽  
Mechanical Tensile ◽  
Cold Pressed ◽  
Nitrogen Contents

Nitrogen-containing nickel-free Fe-18Cr-10Mn-2Mo stainless steel powders were produced by high-energy vibration ball milling under flowing nitrogen atmosphere. It can be found when milling below 4h, the nitrogen contents of the powders tend to be higher level and their particle sizes reduce with increasing the milling time, but when milling beyond 4h, the particle sizes of the powders could not be further refined and the nitrogen contents of the powders increase quite slowly. During high-energy ball milling, there is no new phase formed in the milled powders. The powders milled for 4h, whose nitrogen content is 0.42%, were cold-pressed and sintered under flowing nitrogen atmosphere. The sintered bodies have a ferrite-austenite duplex microstructure, and obtain a relative density as high as 97.2% and a final nitrogen content of 0.38%. The mechanical tensile properties of the sintered bodies are far superior to those of the nitrogen-containing stainless steel prepared by high nitrogen pressure melting technique.

scholarly journals Extreme extensibility and size effects of high-carbon martensitic steel subjected to micro-rolling

2015 ◽  
Vol 45 (11) ◽  
pp. 1187-1194 ◽  
Author(s):  
Ying SUN ◽  
Meng SONG ◽  
YuMing GAO ◽  
QingBo YU ◽  
XiangHua LIU
Keyword(s):  
Size Effects ◽  
Martensitic Steel ◽  
High Carbon ◽  
Carbon Martensitic Steel

Regularities of the Influence of Substitutional and Interstitial Alloying Elements on the Corrosion Properties of Austenitic Stainless Steels

2021 ◽  
Vol 410 ◽  
pp. 336-341
Author(s):  
Eugeny A. Merkushkin ◽  
Vera V. Berezovskaya ◽  
Mikhail A. Serzhanin
Keyword(s):  
Stainless Steel ◽  
Nitrogen Content ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Total Content ◽  
Alloying Elements ◽  
Corrosion Properties ◽  
Positive Role ◽  
Pitting Potential ◽  
Corrosion Studies

Pitting corrosion studies were carried out on nitrogen containing austenitic stainless steels of different compositions and concentrations of alloying elements. As was shown there is a certain predicted influence of the concentration of each alloying elements as chromium, manganese, nickel, carbon and nitrogen on the pitting potential (Eb) of investigated steels with the nitrogen content less than 0.169 wt. %. However with an increase of the nitrogen content to a certain value (in our study up to 0.82 wt. %) the predicting of alloying elements influence on pitting potential of the steels requires a new approach. Based on the analysis of the experimental results and to take into account the influence of all alloying elements in steel on the pitting potential, a regression equation is proposed. In the presence of nitrogen, the positive role of carbon on the pitting resistance of stainless steel was shown, and the critical values of the total content (C + N) and the C / N ratio were determined, allowing prediction of the best composition of stainless steel.

scholarly journals Influence of Vanadium and Cast Temperature on Nitrogen Solubility of Stainless Steel

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Saeed Ghali
Keyword(s):  
Stainless Steel ◽  
Chemical Composition ◽  
Stainless Steels ◽  
Induction Furnace ◽  
Nitrogen Solubility ◽  
Vanadium Content ◽  
Steel Grades ◽  
Cr 5.17 ◽  
Open Induction ◽  
Nitrogen Contents

Three stainless steel grades with different vanadium content were produced in open induction furnace. The base chemical composition of investigated stainless steel has contained 18.48–18.75% Cr, 5.17–5.62% Mn, 2.47–2.58% Mo, and 6.39–6.64% Ni. The vanadium contents of the three stainless steel grades were 0.009%, 0.112%, and 0.189%. The proposed stainless steels were casted at temperatures 1753 K and 1833 K. The nitrogen contents were determined for the produced steel grades at every cast temperature. The determined nitrogen contents were compared with those calculated from the developed equation of Grigorenko and Pomarin. The influence of cast temperature and vanadium content on nitrogen solubility was investigated. Interpretation between experimental and calculated nitrogen content was carried out. Increasing vanadium content and decreasing cast temperature were found to have positive significant effect on the nitrogen solubility. There were great deviations between experimental results and those calculated by Grigorenko and Pomarin equation.

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