Influence of the Current Frequency in Pulsed Plasma Surfacing on the Strength of High-Alloy Steel in Additive Technology

The presented work is aimed at developing a mould geometry suitable for casting both low- and high-alloy steel grades into 500 kg experimental ingots. The high Height-to-Diameter (H/D)-ratio mould currently used in COMTES FHT Inc. served as a reference and for finite element method simulations (FEM) of the filling and solidification process. The optimized mould geometry, balancing the porosity and segregations, was determined using MAGMA software. Four different steel grades were defined for the simulation. Case studies were carried out for 34CrNiMo6 (W.Nr. 1.6582), DHQ8, CB2 and borated stainless steel grades ranging from low-alloy steel to high-alloy steel. Extended user-defined criteria and verified boundary conditions were used to predict the formation of A-segregations in cast steel. Both primary (PDAS) and secondary (SDAS) arm spacings were modelled as well. The optimized mould shape and the casting assembly were designed based on the simulation results.

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The Study of Metallographic Testing of Welding Joint of Welding in High Alloy Steel Installation of Power Station Boiler

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/721/1/012074 ◽

2020 ◽

Vol 721 ◽

pp. 012074

Author(s):

Bing Zhang ◽

Peng He ◽

Jinqing Wang ◽

Zhangmin Jin ◽

Xinmin Pan

Keyword(s):

Alloy Steel ◽

Power Station ◽

High Alloy ◽

High Alloy Steel ◽

Welding Joint ◽

Power Station Boiler

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Determination of Refractory Metals in Ferrous Alloys and High-Alloy Steel by the Borax Disk X-Ray Spectrochemical Method.

Analytical Chemistry ◽

10.1021/ac60194a018 ◽

1963 ◽

Vol 35 (1) ◽

pp. 56-58 ◽

Cited By ~ 27

Author(s):

C. L. Luke

Keyword(s):

Alloy Steel ◽

Refractory Metals ◽

Ferrous Alloys ◽

High Alloy ◽

High Alloy Steel ◽

X Ray

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On the Determination of Microamounts of Phosphorus in High Alloy Steel by the Spectrophotometric Method

Journal of the Japan Institute of Metals and Materials ◽

10.2320/jinstmet1952.37.6_645 ◽

1973 ◽

Vol 37 (6) ◽

pp. 645-651

Author(s):

Takashi Sakaki

Keyword(s):

Alloy Steel ◽

Spectrophotometric Method ◽

High Alloy ◽

High Alloy Steel

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Multilayer high-alloy steel of the ferritic class

Metal Science and Heat Treatment ◽

10.1007/bf02467547 ◽

1998 ◽

Vol 40 (6) ◽

pp. 250-253

Author(s):

V. M. Kondratenko ◽

A. K. Tikhonov ◽

I. N. Blagova ◽

S. S. Kazakov ◽

E. A. Pargamonov ◽

...

Keyword(s):

Alloy Steel ◽

High Alloy ◽

High Alloy Steel

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Study Regarding Process of the Electrical Discharge Machining with Magnetic Activation of the Welded Joints of some Materials High Alloy Steel

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.890.141 ◽

2021 ◽

Vol 890 ◽

pp. 141-146

Author(s):

Mihail Aurel Țîțu ◽

Dumitru Mnerie ◽

Diana Cristina Dragomir ◽

Gabriela Victoria Mnerie

Keyword(s):

Alloy Steel ◽

Welded Joints ◽

Electrical Discharge ◽

Electrical Discharge Machining ◽

Scientific Paper ◽

Electric Discharges ◽

Technological Parameters ◽

High Alloy ◽

High Alloy Steel ◽

Magnetic Activation

The scientific paper presents an extensive research on modeling and optimizing the technological parameters of the process for processing by processing electric discharges with massive electrode with and without magnetic activation. Scientific research is based on real data collected from the process of electrical discharges performed on various samples extracted from areas of welded joints of metal components made of high alloy steel. The processing of experimental data was performed both classically and actively, especially the method of the central factorial experiment composed of orthogonal and rotary. The process parameters that were initially modeled and subsequently optimized were based on a series of independent variables characteristic of dimensional processing by copying the shape of the electrical discharge processing. Subsequent research conclusions and directions, as well as original contributions, are an experimentally validated point of view and worthy of consideration. All these fundamental ideas highlighted above find their explanations and the corresponding explicit treatment in the content of this scientific paper that addresses both managers at all levels and researchers.

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