Effects of heat treatment processes on microstructure and creep properties of a high nitrogen 15Cr–15Ni austenitic heat resistant stainless steel

2011 ◽  
Vol 528 (24) ◽  
pp. 7115-7123 ◽  
Author(s):  
Vu The Ha ◽  
Woo Sang Jung
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
High Nitrogen ◽  
Creep Properties ◽  
Heat Resistant ◽  
Treatment Processes

Study on the Heat-Treatment of Clad Plate for Cutting Tools

2013 ◽  
Vol 401-403 ◽  
pp. 916-919
Author(s):  
Lin Lin Yuan ◽  
Jing Tao Han ◽  
Jing Liu
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Cutting Tools ◽  
High Hardness ◽  
Core Layer ◽  
Water Cooling ◽  
Treatment Processes ◽  
Uniform Microstructure ◽  
Hot Rolled ◽  
Cutting Tool Materials

High sharpness, abrasion resistance, superior ductility, and processability are required in cutting tool materials application. Used 304(0Cr18Ni9) austenitic stainless steel as cladding and 440(7Cr17) martensitic stainless steel as core layer to produce excellently combined stainless steel plate by hot-rolled bonding in this investigation as well as researched various heat treatment processes. The results indicated that the core layer has high hardness and the cladding layer has tiny and uniform microstructure by the method of heating at 10501070°C for 15 minutes, water-cooling , then tempering at 200°C.

Microstructure and Properties of Heat-Treated 440C Martensitic Stainless Steel

2013 ◽  
Vol 334-335 ◽  
pp. 105-110 ◽  
Author(s):  
Siti Hawa Mohamed Salleh ◽  
Mohd Nazree Derman ◽  
Mohd Zaidi Omar ◽  
Junaidi Syarif ◽  
S. Abdullah
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Stainless Steel ◽  
Martensitic Stainless Steel ◽  
Ferrite Matrix ◽  
Rapid Quenching ◽  
Heat Treated Sample ◽  
Treatment Processes ◽  
Heat Treated ◽  
Treated Sample

440C martensitic stainless steels are widely used because of their good mechanical properties. The mechanical properties of 440C martensitic stainless steel were evaluated after heat treatment of these materials at various types of heat treatment processes. The initial part of this investigation focused on the microstructures of these 440C steels. Microstructure evaluations from the as-received to the as-tempered condition were described. In the as-received condition, the formations of ferrite matrix and carbide particles were observed in this steel. In contrast, the precipitation of M7C3carbides and martensitic structures were present in this steel due to the rapid quenching process from the high temperature condition. After precipitation heat treatment, the Cr-rich M23C6carbides were identified within the structures. Moreover, a 30 minutes heat-treated sample shows the highest value of hardness compared to the others holding time. Finally, the tempering process had been carried out to complete the whole heat treatment process in addition to construct the secondary hardening phenomenon. It is believed that this phenomenon influenced the value of hardness of the 440C steel.

STUDY OF THE STRUCTURE, PHASE COMPOSITION, PHYSICOMECHANICAL PROPERTIES, AND ALSO OPTIMIZATION OF HEAT TREATMENT PROCESSES OF CAST HEAT-RESISTANT NICKEL ALLOY ЕР202 BY THE METHOD OF MATHEMATICAL MODELING

2021 ◽  
pp. 3-10
Author(s):  
V. N. Gadalov ◽  
V. R. Petrenko ◽  
E. A. Filatov ◽  
I. V. Vornacheva ◽  
A. V. Filonovich
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Phase Composition ◽  
General Information ◽  
Regression Equations ◽  
Two Stage ◽  
Heat Resistant ◽  
Treatment Processes ◽  
Nickel Chromium ◽  
Treatment Conditions

General information about the EP202 heat-resistant weldable alloy with a nickel-chromium matrix is given. Its chemical composition, manufacturing technology, recommended heat treatment modes for short-term and long-term parts, as well as recommended maintenance modes for castings and rodsheets are presented. A description of the structure and phase composition of the alloy in the cast state and after heat treatment is given. The mechanical properties of the alloy depending on the test temperature and heat treatment conditions for longitudinal and transverse specimens are given. The physical properties of the alloy at various temperatures are also described. Further, the study presents the study of the modes of stepwise aging on the structure and mechanical properties of the EP202 alloy. An increase in mechanical properties after two-stage aging in comparison with the initial heat treatment due to a more uniform distribution of the strengthening γ¢-phase over the volume of the alloy was established. With the help of the obtained regression equations, the optimal temperature of the first stage of two-stage aging (540 C) was established, which ensures an increase in the level of impact strength by (20...25) %.

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