Modeling of the Influence of Admixing and Prealloying on the Optimisation of Compressibility and Sinter-Hardenability of Steel Powders

2012 ◽  
Vol 706-709 ◽  
pp. 2107-2111 ◽  
Author(s):  
Nicolas Giguère ◽  
Carl Blais
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Design Of Experiments ◽  
Automotive Industry ◽  
Minimum Cost ◽  
Heat Treating ◽  
Alloying Elements ◽  
Direct Quenching ◽  
Nickel Chromium ◽  
Superior Mechanical Properties

The automotive industry applies pressure on the PM industry to produce components with superior mechanical properties at minimum cost. In this regard, sinter-hardenable powders are particularly well suited since they allow direct quenching of components at the end of the sintering cycle, thus eliminating the extra steps required for heat treating. This paper presents the results of the modeling of the influence of admixing and/or prealloying on the optimization of compressibility and hardenability of sinter-hardenable steel powders. A first design of experiments (DOE) was used to optimize the chemical composition and to study the interactions between prealloyed elements (Nickel, Chromium, Molybdenum and Manganese) and admixed elements (Nickel, Chromium, Manganese and Copper) on hardenability and compressibility. A second DOE was generated based on the results obtained in the first series. Results show that among all of the examined alloying elements, only prealloyed nickel, chromium and molybdenum had a significant effect on compressibility and hardenability. Moreover, within the range of concentrations under study, the optimum sinter-hardenable powder had the following (prealloyed) chemistry: 1.5 wt-% Ni, 0.55 wt-% Cr and 1.25 wt-% Mo.

NICROFER 5520 Co

Alloy Digest ◽  
1995 ◽  
Vol 44 (3) ◽  
Keyword(s):  
High Temperature ◽  
Chemical Composition ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Temperatures ◽  
Heat Treating ◽  
High Temperature Corrosion ◽  
Creep Properties ◽  
Nickel Chromium ◽  
Temperature Performance

Abstract NICROFER 5520 Co is a nickel-chromium-cobalt-molybdenum alloy with excellent strength and creep properties up to high temperatures. Due to its balanced chemical composition the alloy shows outstanding resistance to high temperature corrosion in the form of oxidation and carburization. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ni-480. Producer or source: VDM Technologies Corporation.

NICROFER 6023

Alloy Digest ◽  
1985 ◽  
Vol 34 (5) ◽  
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperatures ◽  
Iron Alloy ◽  
Heat Treating ◽  
Chemical Equipment ◽  
Good Resistance ◽  
Nickel Chromium ◽  
Power Plant Equipment ◽  
Resistance To Oxidation ◽  
Plant Equipment

Abstract NICROFER 6023 is a nickel-chromium-iron alloy containing small quantities of aluminum. It has excellent resistance to oxidation at high temperatures, good resistance in oxidizing sulfur-bearing atmospheres and good resistance to carburizing conditions. The alloy has good mechanical properties at room and elevated temperatures. Its applications include heat treating furnace equipment, chemical equipment in various industries, and power plant equipment. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-314. Producer or source: Vereingte Deutsche Metallwerke AG.

JESSOP JS600

Alloy Digest ◽  
1983 ◽  
Vol 32 (6) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Food Processing ◽  
Iron Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Steel Company ◽  
Nickel Chromium ◽  
Good Workability ◽  
Resistance To Heat

Abstract JESSOP JS600 is a nickel-chromium-iron alloy for use in environments requiring resistance to heat and/or corrosion. It has excellent mechanical properties and a combination of high strength and good workability. It performs well in applications with temperatures from cryogenic to more than 2000 F. Its many applications include aircraft/aerospace components, equipment for chemical and food processing and parts for heat-treating equipment. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-287. Producer or source: Jessop Steel Company.

SANICRO 31

Alloy Digest ◽  
1965 ◽  
Vol 14 (9) ◽  
Keyword(s):  
Mechanical Properties ◽  
Petrochemical Industry ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
Chromium Alloy ◽  
Good Resistance ◽  
Nickel Chromium ◽  
Temperature Performance ◽  
Iron Nickel ◽  
Corrosion And Oxidation

Abstract SANDVIK SANICRO 31 is an iron-nickel-chromium alloy having good resistance to corrosion and oxidation and good mechanical properties at elevated temperatures. It is recommended for electrical sheathing, pyrometer tubes, equipment for heat treating and furnace tubes and other equipment in the petrochemical industry. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-172. Producer or source: Sandvik.

Quantitative Evaluation of The Chemical Composition of γ-γ’Interfaces in Ni Superalloys

2001 ◽  
Vol 7 (S2) ◽  
pp. 264-265
Author(s):  
H. A. Calderon ◽  
M. Benyoucef ◽  
N. Clement
Keyword(s):  
Mechanical Properties ◽  
Spatial Distribution ◽  
Chemical Composition ◽  
Large Volume ◽  
Alloy Composition ◽  
Volume Fraction ◽  
Alloying Elements ◽  
Local Distribution ◽  
Strain Fields ◽  
Ni Alloys

The excellent mechanical properties of Ni based superalloys depend upon the presence of γ’ particles (LI2 structure). Their volume fraction, spatial distribution and size determine the mechanical strength of these alloys. Ni alloys for technological applications make use of large volume fractions of precipitates where processes of coarsening and coalescence take place during service leading in some cases to deterioration of properties. Addition of different alloying elements prevents accelerated coalescence by retarding diffusion and thus improving the mechanical properties of such alloys. Coalescence can also take place under the influence of an applied stress leading to the formation of rafts of the y' phase. For example the microstructure changes during creep deformation, depending on the alloy composition, with the corresponding formation of dislocation networks and rafts of different morphologies [1]. The γ-γ’ interfaces are also different depending on the alloy composition and most likely to the local distribution of alloying elements and their strain fields.

scholarly journals The interrelation of the chemical composition and mechanical properties of constructional alloyed steels

2018 ◽  
pp. 328-335
Author(s):  
V.A. Lutsenko ◽  
E.V. Parusov ◽  
T.N. Golubenko ◽  
O.V. Lutsenko ◽  
O.V. Parusov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Chemical Composition ◽  
Relative Elongation ◽  
Interatomic Interaction ◽  
Alloying Elements ◽  
Structural Parameter ◽  
National Academy Of Sciences ◽  
Iron And Steel ◽  
European Standards

The aim of the work is to determine the content intervals of alloying elements in structural alloyed steels, which ensure the obtaining of mechanical properties and the conformity of rolled products to the requirements of European standards. The studies were conducted using a predictive model developed by the Iron and Steel Institute of the National Academy of Sciences of Ukraine, taking into account the full chemical composition of the steel. The regularities of changes in the interatomic interaction parameter on the number of alloying elements in the steel composition and its relationship with mechanical properties are revealed. The dependences of mechanical properties (tensile strength, relative elongation) on the chemical composition of steel are constructed through the physicochemical criterion – the average statistical distance between interacting atoms (structural parameter d). The interrelation between the chemical composition and mechanical properties of chrome-molybdenum structural steels has been established. It is shown that increasing the chromium content increases the tensile strength, and doping with molybdenum and vanadium increases the ductility of rolled products. It was determined that in order to guarantee compliance with the requirements of the ultimate strength (900-1100 MPa) and relative elongation (> 11%) for steel 31CrMoV9, the content of alloying elements should correspond to the following intervals: 2.42-2.62%Cr, 0.2-0, 23%Mo and 0.17-0.20%V. The results obtained make it possible to predict the mechanical properties of doped steel, depending on the actual chemical composition of the steel.

UNS N06600

Alloy Digest ◽  
1991 ◽  
Vol 40 (1) ◽  
Keyword(s):  
Mechanical Properties ◽  
Cold Working ◽  
Iron Alloy ◽  
Heat Treating ◽  
Solid Solution Alloy ◽  
Good Resistance ◽  
Nickel Chromium ◽  
Temperature Performance ◽  
Nickel Base ◽  
Good Workability

Abstract UNS No. N06600 is a nickel-chromium-iron alloy with good resistance to corrosion and heat. It is a solid-solution alloy that can be hardened only by cold working and it has excellent mechanical properties with good workability. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness, creep, and fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-391. Producer or source: Producers of nickel-base alloys.

NICROFER 6023H

Alloy Digest ◽  
1997 ◽  
Vol 46 (2) ◽  
Keyword(s):  
Mechanical Properties ◽  
Iron Alloy ◽  
Heat Treating ◽  
Chemical Equipment ◽  
Good Resistance ◽  
Nickel Chromium ◽  
Temperature Performance ◽  
Power Plant Equipment ◽  
Resistance To Oxidation ◽  
Plant Equipment

Abstract Nicrofer 6023 is a nickel-chromium-iron alloy containing small quantities of aluminum. It has excellent resistance to oxidation at high temperatures, good resistance in oxidizing sulfur-bearing atmospheres, and good resistance to carburizing conditions. The alloy has good mechanical properties at room temperatures. Its application includes heat-treating furnace equipment, chemical equipment in various industries, and power plant equipment. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-521. Producer or source: VDM Technologies Corporation.

NICROFER 4221

Alloy Digest ◽  
1983 ◽  
Vol 32 (2) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Stress Corrosion Cracking ◽  
Pitting Corrosion ◽  
Intergranular Corrosion ◽  
Copper Alloy ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
Nickel Chromium

Abstract NICROFER 4221 is a fully austenitic nickel-chromium-iron-molybdenum-copper alloy that is stabilized (against intergranular corrosion) by an addition of titanium. It is resistant to stress-corrosion cracking, pitting corrosion and oxidizing and non-oxidizing hot acids. It has good mechanical properties both at room and at elevated temperatures. It is used in a wide variety of applications up to 540 C (1000 F). This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-283. Producer or source: Vereingte Deutsche Metallwerke AG.

The Study of the Complex Mechanical Properties of Rolled Bars of VT6 Alloy as a Function of Chemical Composition and Structure Type

2020 ◽  
Vol 989 ◽  
pp. 283-289
Author(s):  
Yu.B. Egorova ◽  
L.V. Davydenko ◽  
I.M. Mamonov
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Statistical Tests ◽  
Structure Type ◽  
Strength Properties ◽  
Alloying Elements ◽  
Mean Values ◽  
Composition And Structure ◽  
Composition Structure ◽  
The Stability

This paper presents the results of statistical tests, carried out to identify the mechanical properties of Ø 16-150 mm VT6 titanium alloy bars, as a function of their post-annealing chemical composition and structure. It is shown that the high variation of mechanical properties may be, due to fluctuations in the grade composition and structure type. 50% to 60% of variations in strength properties are due to composition + structure co-effects. To improve the stability of such properties, the paper identifies maximum permissible total fluctuations in the chemical composition in terms of aluminum/molybdenum equivalents of alloying elements and impurities. The research team has fitted the regression dependencies for evaluating the mean values of the mechanical properties of Ø 16-60 mm VT6 bars, as a function of the structure type and aluminum/molybdenum equivalents of the alloying elements and impurities.

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