Development of Hardening Technology for Oil and Gas Pumping and Compressor Equipment Using Laser Hardening

This paper considers the results of modes testing for surface laser hardening. It also includes the development of compositions for light-absorbing coating for industrial application of laser hardening. The paper presents the influence of the light-absorbing coating on the structuring of the surface layer under laser hardening of medium-carbon alloy steel.

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The Investigation of Surface Nanocrystallization of Structural Steel Induced by Supersonic Fine Particles Bombarding

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.373-374.811 ◽

2008 ◽

Vol 373-374 ◽

pp. 811-814

Author(s):

De Ma Ba ◽

Shi Ning Ma ◽

Fan Jun Meng ◽

C.Q. Li

Keyword(s):

Electron Microscopy ◽

Surface Layer ◽

Carbon Steel ◽

Alloy Steel ◽

Fine Particles ◽

Medium Carbon Steel ◽

Nanostructured Surface ◽

Medium Carbon ◽

Silicon Alloy ◽

Cell Structures

The nanostructured surface layers were fabricated on a hardened and tempered chrome-silicon alloy steel and a normalized medium carbon steel by mean of Supersonic Fine Particles Bombarding (SFPB). The microstructure features in the treated surface layer were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations. Experimental results show the nanostructured surface layer is fabricated on both samples after SFPB treatment. The microstructure of the top surface is characterized by uniformly distributed nano-scale grains with equiaxed shape and random crystallographic orientations. The mean size of equiaxed nanocrystallites on the top surface layer is approximately 15-20nm for the SFPB treated medium carbon steel and Chrome-silicon alloy steel. During severe deformation the grain refinement in ferrite and cementite phases is observed, the cementite phases are exposed to breaking and dissolution due to mechanical alloying resulting in the formation of a supersaturated solid solution of carbon in α-Fe matrix. In the ferrite phase, the grains are refined by the process of dislocation actives and forming cell structures separated by dense dislocation walls (DDWs), as well as evolution of dislocation to subboundaries and grain boundaries.

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AISI 3150

Alloy Digest ◽

10.31399/asm.ad.sa0143 ◽

1963 ◽

Vol 12 (3) ◽

Keyword(s):

Fracture Toughness ◽

Physical Properties ◽

Tensile Properties ◽

Nickel Alloy ◽

Elastic Properties ◽

Alloy Steel ◽

Heat Treating ◽

Great Depth ◽

Medium Carbon ◽

Steel Mills

Abstract AISI 3150 is a medium carbon, chromium-nickel alloy steel having great depth hardness, high elastic properties and excellent fatigue resistance and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on heat treating and machining. Filing Code: SA-143. Producer or source: Alloy steel mills and foundries.

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Hydrogeology correction in the gravitational field from satellite data

Geodesy and Cartography ◽

10.22389/0016-7126-2018-931-1-2-7 ◽

2018 ◽

Vol 931 (1) ◽

pp. 2-7

Author(s):

V.D. Jushkin ◽

L.V. Zotov ◽

O.A. Khrapenko

Keyword(s):

Gravitational Field ◽

Oil And Gas ◽

Repeated Measurements ◽

Geological Factors ◽

Grace Satellite ◽

Gas Pumping ◽

Acceleration Of Gravity ◽

Determination Of Parameters ◽

Gravity Acceleration

The results of repeated measurements of the acceleration of gravity by the Russian absolute ballistic field gravimeter GABL-M on points of oil and gas deposits in the permafrost over a five year period are presented. The changes of gravity acceleration by the absolute gravimeter and GRACE satellite were compared. The results of comparisons of differences gravity acceleration by ballistic gravimeter GABL-M and relative Canadian gravimeters CG5 were [i]shown. The errors in determination of parameters of the gravitational field ballistic gravimeter GABL-M and CG5 gravimeters group were presented. The method of measurement with the gravimeter GABL-M and the method of determining the vertical gradients relative CG5 gravity meters was described. The necessity of introducing corrections of hydrogeology is caused by influence of hydro geological factors on the gravitational field in the permafrost. They are comparable with the values of the field change in the result of gas pumping.

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