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Zhang N.,Xuzhou Institute of Technology | Huang C.H.,Xuzhou Institute of Technology | Zhang C.H.,Xuzhou Bioengineering Technical College | Shi N.,Xuzhou Institute of Technology
Advanced Materials Research | Year: 2013

The hydraulic cylinder is the essential component in the construction machinery, and the quality and safety of construction machinery products depends on its performance. As the main part of the hydraulic cylinder rod. the quality and reliability are the key indicators of the hydraulic cylinder, hi this paper, the hard chrome plating layer of hydraulic cylinder rod was tested by metallographic analysis, surface morphology observation, hardness test, corrosion resistance experiment, in order to evaluate the anticorrosion, economy and technology of the electroplating technology, and discuss the anticorrosion mechanism, so the experimental and theoretical basis will be provided in the field of production. The contribution will be made by improving the corrosion resistance and wear resistance, increasing the operational reliability, extendeding service life of the hydraulic cylinder rod. © (2013) Trans Tech Publications, Switzerland. Source


Zhang N.,Xuzhou Institute of Technology | Zhang N.,China University of Mining and Technology | Zhang C.,Xuzhou Bioengineering Technical College | Qiang Y.,China University of Mining and Technology
Applied Mechanics and Materials | Year: 2013

TiN coatings were deposited by Magnetron Sputter Ion Plating (MSIP) on the surface of high-speed steel W18Cr4V.The microstructure,coating thickness, micro-hardness and wear resistance of surface modification sample were investigated by the D/MAX-IIIB X-ray diffraction tester, the coating thickness tester, the HV-1000 micro-sclerometer,the LKDM-2000 friction and wear tester,the S-3000N scaning electron microscopy.The influence of sputtering time,N2 partial pressures and sputtering current on the microstructure,coating thickness, micro-hardness and wear resistance of TiN coatings were also analysed. The best synthesis performance sputtering coatings of technologic scheme was established. © (2013) Trans Tech Publications, Switzerland. Source


Zhang C.H.,Xuzhou Bioengineering Technical College | Zhang N.,Xuzhou Institute of Technology | Fang J.N.,Xuzhou Bioengineering Technical College | Qiang Y.H.,China University of Mining and Technology
Advanced Materials Research | Year: 2014

The composite electroslag remelting technology was prepared with Cr12Mo1V1 steel as matrix, and the WC particles as hard phase steel bonded carbide. By means of metallographic analysis and scanning electron microscopy and other methods to study the microstructure and grinding crack morphology of the composites, and rockwell hardness and friction and wear experiment was carried out. The results show that WC particles had no obvious slant phenomenon, partly dissolved in the steel matrix, Fe3W3C multiple carbides precipitated after cooling. And the external hardness and abrasion resistance fo the roll were higher than the core, combined with good WC particles and steel matrix, and wear surface grinding marks was small, shallow furrowed, improved the roll wear resistance and service life. © (2014) Trans Tech Publications, Switzerland. Source


Zhang C.H.,Xuzhou Bioengineering Technical College | Zhang N.,Xuzhou Institute of Technology | Wang Y.,Xuzhou Bioengineering Technical College
Advanced Materials Research | Year: 2013

Cutting tooth especially due to the poor quality of the shearer brazing, caused enormous economic losses each year in our country, which caused great pick consumption and delayed hours, and then resulting in reduced efficiency. The tooth body wear of the whole shearer picks accounts for half of its overall failure. In this experiment, the heat treatment which included heating temperature, soaking time, and cooling, etc. was designed by service conditions and performance requirements of the body material 40Cr. The change of microstrcture and mechanical property was analysed by quenching and tempering treatment, thus prolong the service life of shearer picks by improving the comprehensive performance of the tooth body material. © (2013) Trans Tech Publications, Switzerland. Source


Qiang C.-K.,Yangzhou University | Qiang C.-K.,Xuzhou Bioengineering Technical College | Du Y.-Z.,Yangzhou University | Yu L.-Y.,Yangzhou University | And 2 more authors.
Research Journal of Biotechnology | Year: 2010

The rice stem borer, Chilo suppressalis Walker, is an economically important pest distributed in rice producing regions of China. To understand its molecular adaptation, the authors cloned the cDNA sequence of CcsHsp90 which is essential for dealing with many environmental stresses in all organisms and measured the mRNA expression in the diapausing larvae exposed to temperature stress. The results showed that CcsHsp90 (GenBank accession no. FJ866608) is potentially encoded to 312 amino acids with calculated molecular weight of 35.59KDa and the theoretical isoeletric point of 4.72. The deduced amino acid sequence of CcsHsp90 is displayed over 80% of the degree of conservation to other Lepidopteran insects. The relative mRNA expression levels of CcsHsp90 in the diapausing larvae which were exposed to different temperatures from 28 °C (CK) to -14 °C with a gradient of 7 °C for 4h increased first and decreased later and peaked at O "C. Then the larvae were exposed to O 7deg;C for 0-8h, the change of the levels was the same as the above and peaked at 4h treatment. Therefore, it could be concluded that O °C for 4h treatment might induce the maximal expression of CcsHsp90 in the diapausing larvae of the rice stem borer. Source

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