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Xu C.J.,University of Science and TechnologyLiaoning | Zeng Y.X.,University of Science and TechnologyLiaoning | Wang Z.L.,Zhongyuan Special Steel Co. | Li J.,University of Science and TechnologyLiaoning | And 2 more authors.
Metalurgija | Year: 2016

The electromagnetic feeding method was used to improve solidification quality of steel ingot, and the feeding principle of electromagnetic riser was introduced. The distribution characteristics of magnetic field in electromagnetic riser were investigated before and after pouring steel by the measures of numerical and physical simulation. The results showed that there’s a good symmetry of magnetic field distribution in electromagnetic feeding riser before pouring steel, but both symmetry and uniformity of magnetic field distribution are broken after pouring steel into riser, and magnetic induction intensity of the surface is higher than that of the inner of feeding riser. © 2016, Faculty of Metallurgy. All Rights Reserved.


Liu A.-F.,Zhongyuan Special Steel Co.
Yejin Fenxi/Metallurgical Analysis | Year: 2015

The aluminium alloy sample was dissolved with sodium hydroxide solution followed by acidification with dilute sulfuric acid. The solution was transferred into separating funnel. The boric acid in solution could react with certain amount of mandelic acid and malachite green to form ternary complex, which could be quantitatively extracted with benzene. The extract liquor was directly injected into the organic sampling system of inductively coupled plasma atomic emission spectrometer (ICP-AES). The content of boron in ammonium alloy was determined using B 249.678 nm as analytical line. The sample dissolution method, the extracting reagent, the extraction method and conditions (time and acidity) were selected. The physical interference was eliminated by matrix matching method. The mass fraction of boron below 1.00 mg/L was linear to the emission intensity. The linear correlation coefficient of calibration curve was r=0.9993. The detection limit of boron was 0.001 mg/L. The standard sample and owned sample were determined according to the experimental method. The found results of standard sample were consistent with the certified values. The relative standard deviation (RSD, n=10) of determination results of owned sample was less than 5%. The recoveries were between 80% and 100%. The proposed method was applicable for the detection of boron in aluminium alloy with minimum mass fraction of 0.0001%. ©, 2015, Central Iron and Steel Research Institute. All right reserved.


Yuan C.,Jiyuan Vocational and Technical College | Yang Y.,Jiyuan Vocational and Technical College | Chen L.,Zhongyuan Special Steel Co.
Applied Mechanics and Materials | Year: 2013

In view of the current LCA software, electromechanical products green design and green technology system are lacks of good support issues. From the electromechanical product manufacturing, process's technology characteristics, process parameters and green characteristic starting, to establish the overall technology system flow, system structure and system function model, and then from the view of electromechanical product life cycle green information integration, to analyze product BOM structure and green information integration strategy. According to the relationship between macining process parameters and process output indicators factors, to set up electromechanical products' process parameter model and the quantification method under LCA, using GBP algorithm selects optimization program, to achieve green manufacturing process. From the point of integration in-depth analysis, the analysis of the relationship between system functions and multiple targets of process parameters, and further development of a prototype system. © (2013) Trans Tech Publications, Switzerland.


Du G.,Zhongyuan Special Steel Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2012

Rational post-forged heat treatment parameter for H13 steel was confirmed according to the service performance by analyzing phase transformation theory of H13 steel. Perfect spheroidizing annealed structure was obtained. And combining with the actual production situation of company, the most suitable post-forged heat treatment process was worked out. The production test demonstrates that the normalization+spheroidal annealing following new process is superior to others.


Zhou X.,Henan University of Science and Technology | Li H.,Henan University of Science and Technology | Yang C.,Huaneng Qinbei Power Generation Co. | Guo J.,Henan University of Science and Technology | Gao Q.,Zhongyuan Special Steel Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2015

Hot compression tests were used to investigate the plastic deformation behavior of as-cast 42CrMo steel at elevated temperature. The tests were performed on Gleeble 1500D at strain rates ranged from 0.01 to 10 s-1, deformation temperature 1000-1150℃, and deformation 60%. The results show that the material flow stress decreases with the increase of deformation temperature and increases with the increase of strain rate. The peak stress activation energy of the tested steel is 325.63 kJ/mol and the steady stress activation energy is 271.84 kJ/mol. Dynamic recrystallization takes place during the deformation process, and the average dynamically recrystallized grain size (Ddrx) increases with temperature and decreases with the increase of strain rate. The natural logarithm of Ddrx is linear with the natural logarithm of Zener-Hollomon parameter. ©, 2015, Chinese Mechanical Engineering Society of Heat Treatment. All right reserved.

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