The role of heat treatment on wear behavior of powder metallurgy low alloy steels

2002 ◽  
Vol 23 (7) ◽  
pp. 667-670 ◽  
Author(s):  
H Khorsand ◽  
S.M Habibi ◽  
H Yoozbashizadea ◽  
K Janghorban ◽  
S.M.S Reihani ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Powder Metallurgy ◽  
Wear Behavior ◽  
Low Alloy Steels ◽  
Alloy Steels

Recent Aspects on the Effect of Inclusion Characteristics on the Intragranular Ferrite Formation in Low Alloy Steels: A Review

2017 ◽  
Vol 36 (4) ◽  
pp. 309-325 ◽  
Author(s):  
Wangzhong Mu ◽  
Pär Göran Jönsson ◽  
Keiji Nakajima
Keyword(s):  
Heat Affected Zone ◽  
Low Alloy Steels ◽  
Low Carbon ◽  
Intragranular Ferrite ◽  
Metallic Inclusions ◽  
Theoretical Investigations ◽  
Alloy Steels ◽  
Institute Of Technology ◽  
Future Work

AbstractIntragranular ferrite (IGF), which nucleates from specific inclusion surfaces in low alloy steels, is the desired microstructure to improve mechanical properties of steel such as the toughness. This microstructure is especially important in the coarse grain heat affected zone (CGHAZ) of weldments. The latest review paper focusing on the role of non-metallic inclusions in the IGF formation in steels has been reported by Sarma et al. in 2009 (ISIJ int., 49(2009), 1063–1074). In recent years, large amount of papers have been presented to investigate different issues of this topic. This paper mainly highlights the frontiers of experimental and theoretical investigations on the effects of inclusion characteristics, such as the composition, size distribution and number density, on the IGF formation in low carbon low-alloyed steels, undertaken by the group of Applied Process Metallurgy, KTH Royal Institute of Technology. Related results reported in previous studies are also introduced. Also, plausible future work regarding various items of IGF formation is mentioned in each section. This work aims to give a better control of improving the steel quality during casting and in the heat affected zone (HAZ) of weldment, according to the concept of oxide metallurgy.

scholarly journals Effect of tempering heat treatment on the CO2 corrosion resistance of quench-hardened Cr-Mo low-alloy steels for oil and gas applications

2019 ◽  
Vol 154 ◽  
pp. 36-48 ◽  
Author(s):  
Clara. Escrivà-Cerdán ◽  
Steve W. Ooi ◽  
Gaurav R. Joshi ◽  
Roberto Morana ◽  
H.K.D.H. Bhadeshia ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Oil And Gas ◽  
Co2 Corrosion ◽  
Low Alloy Steels ◽  
Alloy Steels

The Role of Nonmetallic Inclusions in Accelerating the Local Corrosion of Metal Products Made of Plain-Carbon and Low-Alloy Steels

Metallurgist ◽  
2005 ◽  
Vol 49 (3-4) ◽  
pp. 124-130 ◽  
Author(s):  
I. G. Rodionova ◽  
O. N. Baklanova ◽  
G. A. Filippov ◽  
I. I. Reformatskaya ◽  
A. N. Podobaev ◽  
...  
Keyword(s):  
Nonmetallic Inclusions ◽  
Local Corrosion ◽  
Low Alloy Steels ◽  
Alloy Steels ◽  
Metal Products

Alternative Approach for Qualification of Temperbead Welding in the Nuclear Industry

2012 ◽  
Author(s):  
Steven L. McCracken ◽  
Richard E. Smith
Keyword(s):  
Heat Treatment ◽  
Fracture Toughness ◽  
Alloy Steel ◽  
Nuclear Power ◽  
Post Weld Heat Treatment ◽  
Nuclear Power Industry ◽  
Low Alloy Steels ◽  
Low Alloy Steel ◽  
Alloy Steels ◽  
Weld Heat

Temperbead welding is common practice in the nuclear power industry for in-situ repair of quenched and tempered low alloy steels where post weld heat treatment is impractical. The temperbead process controls the heat input such that the weld heat-affected-zone (HAZ) in the low alloy steel is tempered by the welding heat of subsequent layers. This tempering eliminates the need for post weld heat treatment (PWHT). Unfortunately, repair organizations in the nuclear power industry are experiencing difficulty when attempting to qualify temperbead welding procedures on new quenched and tempered low alloy steel base materials manufactured to modern melting and deoxidation practices. The current ASME Code methodology and protocol for verification of adequate fracture toughness in materials was developed in the early 1970s. This paper reviews typical temperbead qualification results for vintage heats of quenched and tempered low alloy steels and compares them to similar test results obtained with modern materials of the same specification exhibiting superior fracture toughness.

The Determination of Carbide Types in Thin-Film Specimens of Low Alloy Steels.

2000 ◽  
Vol 6 (S2) ◽  
pp. 348-349 ◽  
Author(s):  
A.J. Papworth ◽  
M. Watanabe ◽  
D.B. Williams
Keyword(s):  
Auger Electron ◽  
Temper Embrittlement ◽  
Thermal Exposure ◽  
Low Alloy Steels ◽  
Austenite Grain ◽  
Alloy Steels ◽  
Electron Spectrometry ◽  
Prior Austenite Grain

The introduction of “clean steels” was thought to have cured the problem of temper embrittlement in low alloy steels. However, even these steels exhibit temper embrittlement at services temperature above 400°C. Initial studies of temper embrittlement of clean steels used Auger electron spectrometry of fracture surfaces. The failure was found to occur along the prior austenite grain boundaries (PAGBs) where P segregation was found. It has been reported that the concentration of segregants changes along individual PAGB facets, as well as between the facets of different PAGBs. It was proposed that different elements segregate to different PAGBs, depending on their orientation. Differences in segregation along individual PAGBs were attributed to precipitation during thermal exposure, as identified by AEM. The cause of temper embrittlement is still unknown, as there are doubts about the role of precipitation. This implies that each PAGB may have a different chemistry.

Sign in / Sign up

Export Citation Format

Share Document