scholarly journals Jominy End Quench Test of Martensitic Stainless Steel X30Cr13

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1071
Author(s):  
Pierre Landgraf ◽  
Peter Birnbaum ◽  
Enrique Meza-García ◽  
Thomas Grund ◽  
Verena Kräusel ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Cooling Rate ◽  
Pitting Corrosion ◽  
Martensitic Stainless Steel ◽  
High Hardness ◽  
Optimum Process ◽  
Austenitizing Temperature ◽  
Fe Method ◽  
Corrosion Properties

In this study, the influence of thermal treatments on the properties of the martensitic stainless steel X30Cr13 (EN 10088-3: 1.4028) were investigated. These steels are characterized by a high hardness as well as corrosion resistance and can be specifically adjusted by heat treatment. In particular, the austenitizing temperature ϑA and cooling rate T˙ affect the hardness and corrosion properties of martensitic stainless steels. In order to investigate these influences, the Jominy end quench tests were performed at varying austenitizing temperatures. The aim is to determine the hardness and corrosion properties as a function of the austenitizing temperature and the cooling rate. The austenitizing temperature strongly influences the solubility of alloying elements within the austenitic lattice as well as the grain size, and thus affects both precipitation and phase transformation kinetics. In consequence, different austenitizing temperatures lead to different macroscopic material properties, like hardness and pitting corrosion potential. The heat treatment was simulated using finite element (FE) method and compared with time-temperature sequences measured at different locations of the Jominy end quench sample using thermocouples. That allows determining the cooling rate T˙ between 800∘C and 500∘C and to assign it to each location of the Jominy end quench sample. The numerical estimations were in close conformity with the experimental values. By assigning the hardness and pitting corrosion potentials to the respective cooling rates as a function of the austenitizing temperature, it is possible to determine optimum process windows for the required properties.

scholarly journals Effect of Aging Heat Treatment H950 and H1000 on Mechanical and Pitting Corrosion Properties of UNS S46500 Stainless Steel

2018 ◽  
Vol 22 (1) ◽  
Author(s):  
Camila Haga Beraldo ◽  
José Wilmar Calderón-Hernández ◽  
Rodrigo Magnabosco ◽  
Neusa Alonso-Falleiros
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Pitting Corrosion ◽  
Corrosion Properties ◽  
Aging Heat Treatment

scholarly journals Effect of Quenching Media Variations on the Mechanical Behavior of Martensitic Stainless Steel

2019 ◽  
Vol 15 (2) ◽  
pp. 1-12 ◽  
Author(s):  
Abbas Kh. Hussein ◽  
Laith K. Abbas ◽  
Wisam N. Hasan
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Wear Rate ◽  
Process Parameters ◽  
Impact Energy ◽  
Salt Solution ◽  
Martensitic Stainless Steel ◽  
Austenitizing Temperature ◽  
Soaking Time ◽  
Α Al2o3

The purpose of this study is designate quenching and tempering heat treatment by using Taguchi technique to determine optimal factors of heat treatment (austenitizing temperature, percentage of nanoparticles, type of base media, nanoparticles type and soaking time) for increasing hardness, wear rate and impact energy properties of 420 martensitic stainless steel. An (L18) orthogonal array was chosen for the design of experiment. The optimum process parameters were determined by using signal-to-noise ratio (larger is better) criterion for hardness and impact energy while (Smaller is better) criterion was for the wear rate. The importance levels of process parameters that effect on hardness, wear rate and impact energy properties were obtained by using analysis of variance which applied with the help of (Minitab18) software. The variables of quenching heat treatment were austenitizing temperature (985 C˚,1060 C˚),a soaking times (50,70 and 90 minutes) respectively, Percentage of volumetric fractions of nanoparticles with three different levels(0.01, 0.03 and 0.08 %) were prepared by dispersing nanoparticles that are  (α-Al2O3,TiO2 and CuO) with base fluids (De-ionized water, salt solution and engine oil).The specimens were tempered at 700°C after quenching of nanofluids for  (2 hours).The results for ( S/N) ratios showed the order of the factors in terms of the proportion of their effect on hardness, and wear rate  properties as follow: Austenitizing temperature ( 1060 C˚),Type of base media (salt solution), Nanoparticles type (CuO), Percentage of nanoparticles (0.08%) and Soaking time(90min) was the least influence while for the impact energy were as follows: Type of base media (oil), Austenitizing temperature (985C˚), Percentage of nanoparticles (0.01%), Nanoparticles type (α-Al2O3) and last soaking time (50min).

Effect of cooling rate after heat treatment on pitting corrosion of super duplex stainless steel UNS S 32750

2018 ◽  
Vol 65 (5) ◽  
pp. 492-498 ◽  
Author(s):  
Byung-Hyun Shin ◽  
Junghyun Park ◽  
Jongbae Jeon ◽  
Sung-bo Heo ◽  
Wonsub Chung
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Cooling Rate ◽  
Pitting Corrosion ◽  
Heat Treatment Temperature ◽  
Secondary Phase ◽  
Treatment Temperature ◽  
Super Duplex Stainless Steel ◽  
Content Type

Purpose In this study, super duplex stainless steel (SDSS) was heat-treated. The purpose of this study is to assess the effect of the cooling rate after heat treatment on the pitting corrosion of SDSS. Design/methodology/approach The heat treatment from 1,000°C to 1,300°C was applied to SDSS to check the effect of the cooling rate. Findings The heat treatment temperature produced a different SDSS microstructure, and the cooling rate led to the growth of austenite. The casted SDSS indicated the presence of heterogeneous austenite, and the precipitation secondary phase under 1.6 per cent precipitated to bare metal. By applying heat treatment and cooling SDSS, its corrosion resistance changes because of the change in the chemical composition. The cooling rate at 5,600 J/s has the highest critical pitting temperature (CPT) at 1,100°C, and the cooling rate at 1.6 J/s has the highest CPT at 1,200°C. Low cooling rate (0.4 J/s) made the secondary phase at all temperature range. Research limitations/implications The effect of secondary phase not consider because that is well known to decreasing corrosion resistance. Practical implications Solution annealing is taken into account to optimize the corrosion resistance. But that is not consider the cooling rate at each temperature. This study assessed the effect of the cooling rate at each temperature point. Social implications Manufacturers need to know the effect of the cooling rate to optimize the corrosion resistance, and this study can be applied in the industrial scene. Originality/value SDSS is hard the optimization because SDSS is a dual-phase stainless steel. Corrosion resistance can be optimized by controlling heat treatment temperature and the cooling rate. Anyone not studied the effect of the cooling rate at each temperature. The effect of the cooling rate should be considered to optimize the corrosion resistance.

Centrifugal Casting Practice and Microstructure and Mechanical Properties of a 2205 Duplex Stainless Steel

2005 ◽  
Vol 475-479 ◽  
pp. 2527-2532 ◽  
Author(s):  
Sang Mok Lee ◽  
S. Yang ◽  
S.T. Kim ◽  
Y.S. Park ◽  
B.M. Moon
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Cooling Rate ◽  
Centrifugal Casting ◽  
Corrosion Properties ◽  
Σ Phase ◽  
Air Atmosphere ◽  
Treatment Conditions

Microstructural features, mechanical properties, and corrosion properties of a SAF2205 duplex stainless steel (DSS) were systematically investigated as functions of cooling rate during casting and heat treatment conditions. The choice of a duplex stainless steel was a SAF2205 alloy, of which composition is 0.03C, 21~23Cr, 4.5~6.5Ni, 2.5~3.5Mo, 0.08~0.2N, 1.0Si, and 2.0Mn with remaining Fe. A 5-stepped sand mold and the permanent Y-block mold were used to check the effect of cooling rate during solidification. The microstructural characteristics, such as grain size, the d/γ ratio, the existence of the carbides and σ phase has been noticed to greatly change with the variation of cooling rate during the casting procedure. Various heat treatment conditions were also examined to achieve the optimized mechanical properties of DSS. Based on the preliminary examination, the feasibility study of utilization of centrifugal casting has been carried out for the production of better quality DSS pipe components. Melting and casting practices of DSS during centrifugal casting in an air atmosphere were systematically investigated in order to obtain the optimized process parameters.

scholarly journals Influence of Aging Heat Treatment on Pitting Corrosion Resistance of Martensitic Stainless Steel

2021 ◽  
Vol 17 (1) ◽  
pp. 20-33
Author(s):  
Abdullah Dhayea Assi
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Pitting Corrosion ◽  
Corrosion Test ◽  
Martensitic Stainless Steel ◽  
Aging Heat Treatment ◽  
Chemical Corrosion ◽  
Pitting Corrosion Resistance

In this research is to study the influence of the aging heat treatment on the pitting corrosion resistance of martensitic stainless steel (MSS), where a number of specimens from martensitic stainless steel were subjected to solution treatment at 1100 oC for one hour followed by water quenching then aging in the temperatures range (500-750) oC for different holding times (1,5,10,15&20) hr. Accelerated chemical corrosion test and immersion chemical corrosion test were performed on samples after heat treatment. The results of the research showed that the pitting corrosion resistance is significantly affected by the aging temperature. Where found that the aging samples at a temperature of 500 °C have the highest rate of corrosion which may be due to an increase in the ratio of the Delta type ferrite (δ-ferrite) and very soft precipitates from other phases of heterogeneous form in the basic martensitic phase; which leads to increased corrosion rate, whereas aging   samples in the temperature range (550–650) °C have the smaller rate of corrosion values, this is due to the high volumetric ratio of remaining austenite. The aging samples at temperatures above 650 °C show an average corrosion rate. It was also found that the type of pits resulting from both the chemical corrosion tests and their shape were not related to the ferrite type and the carbides present in the microstructure

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