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An J.,Jilin University | Li C.,Jilin University | Wen Z.,Jilin University | Yang Y.L.,Songyuan Daduo Oilfield Accessory Industry Co. | Sun S.J.,Songyuan Daduo Oilfield Accessory Industry Co.
Metal Science and Heat Treatment | Year: 2012

The effect of boronizing from solid phase on the tensile mechanical properties and corrosion and wear resistances of steel AISI 8620 is studied. Boronizing is shown to have a positive effect on the corrosion and wear performance of oilfield sucker rods. © 2012 Springer Science+Business Media, Inc. Source


Su Z.-G.,Jilin University | Yang Y.-L.,Songyuan Daduo Oilfield Accessory Industry Co. | Lu Y.,Jilin University | Sun S.-J.,Songyuan Daduo Oilfield Accessory Industry Co. | An J.,Jilin University
Mocaxue Xuebao/Tribology | Year: 2010

The friction and wear behaviors of three materials for sucker rod centralizer including fiber-reinforced nylon, nodular cast iron and quenched nodular cast iron against Al2O3 ceramics under dry sliding and oil field water lubricating conditions were investigated on a pin-on-disc tribometer. A laser optical microscopy, scanning electron microscopy, Fourier transform infrared (FTIR) spectrometer, digital temperature measurement system and X-ray photoelectron spectrometer were used to investigate the microstructure, wear mechanism and chemical nature change of the investigated materials. The results showed that the coefficient of friction under lubricated condition was slightly lower than that under dry sliding and nylon 66 exhibited the lowest coefficient of friction. The quenched nodular cast iron showed the lowest wear under both dry sliding and lubricated conditions. The wear of nylon under lubricated condition was higher than that under dry sliding, and was much higher than that of nodular cast iron and quenched nodular cast iron. The high wear of nodular cast iron and quenched nodular cast iron was attributed to the combination of hot deformation, degradation and micro-ploughing. Source


Su Z.G.,Jilin University | Lv X.X.,Jilin University | An J.,Jilin University | Yang Y.L.,Songyuan Daduo Oilfield Accessory Industry Co. | Sun S.J.,Songyuan Daduo Oilfield Accessory Industry Co.
Journal of Materials Engineering and Performance | Year: 2012

Boronizing of AISI 1045 and ASTMW1-111/2 steels was carried out by pack boriding using Nd 2O 3-containing agent in the temperature range of 1053 to 1213 K. The effect of RE element Nd on boronizing kinetics was analyzed in terms of possible chemical reactions in boriding agent, surface elemental distribution and morphology evolution of the steels boronized at different temperatures. The results showed that the RE element Nd has two opposite effects on boronizing process, i.e., promoting effect at high temperatures and hindering effect at low temperatures. Boronizing using Nd 2O 3-containing agent can remarkably reduce the diffusion activation energy at higher temperatures. Empirical equations relating the boride layer thickness with processing time and temperature are established. Based on these equations, the contour diagrams of boride layer thickness for the studied steels boronized with addition of 5%Nd 2O 3 are presented.©ASM International. Source


An J.,Jilin University | Su Z.G.,Jilin University | Gao X.X.,Jilin University | Yang Y.L.,Songyuan Daduo Oilfield Accessory Industry Co. | Sun S.J.,Songyuan Daduo Oilfield Accessory Industry Co.
Protection of Metals and Physical Chemistry of Surfaces | Year: 2012

The corrosion behaviours of non-boronized and boronized AISI 8620 steels in both oil field water and H 2S-saturated oil field water have been investigated by means of immersion test, electrochemical method, X-ray diffraction and scanning electron microscopy. The experimental results show that boronized steel has better corrosion resistance to as-received oil field water and H 2S-saturated oil field water than the non-boronized steel. Both non-boronized and boronized steels have reacted with H 2S and form corrosion film of FeS, which could not retard the corrosion process due to pores and cracks in the FeS film, and large scale of pitting corrosion is found on non-boronized AISI 8620 steel surface. The immersion corrosion of non-boronized AISI8620 in both corrosion solutions can be divided into two stages: the rapid corrosion stage with high slope and the gradual corrosion stage with low slope, corresponding to uniform corrosion and corrosive product scaling off the surface, respectively. The better corrosion resistance shown by boronized AISI 8620 steel is ascribed to lower corrosion current as compared with the non-boronized AISI8620 steel. © 2012 Pleiades Publishing, Ltd. Source


An J.,Jilin University | Li C.,Jilin University | Wen Z.,Jilin University | Yang Y.L.,Songyuan Daduo Oilfield Accessory Industry Co. | Sun S.J.,Songyuan Daduo Oilfield Accessory Industry Co.
Metal Science and Heat Treatment | Year: 2012

The effect of boronizing from solid phase on the tensile mechanical properties and corrosion and wear resistances of steel AISI 8620 is studied. Boronizing is shown to have a positive effect on the corrosion and wear performance of oilfield sucker rods. © 2012 Springer Science + Business Media, Inc. Source

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