王仲仁教授简况

<正> 王仲仁教授1934年5月出生于江苏省阜宁县,1947年到1951年曾在扬州中学、泰州中学及无锡市一中学习,1951年考入华北大学工学院(北京理工大学前身),1952年开始到新创建的北京钢铁学院(现北京科技大学)学习直至毕业。1955年到1957年在哈尔滨工业大学压力加工系研究生班学习,毕业后留校任教至今。     

A 19F.N.M.R. study of graphite fluorosulfates

Graphite fluorosulfates, C_nSO₃F, with n = 7 for stage-one materials, are ideally suited for ¹⁹F n.m.r. studies due to the unambiguous identity of the intercalate and its axially symmetric nature. The intensity of the signal shows a clear dependence on the orientation of the c axis with respect to the oscillating radio-frequency field H₁. The chemical shift value, however, is affected by the orientation of the c axis with respect to H₀. The powder spectrum of the stage-one material C₇SO₃F extends from 10 to 100 ppm at low temperatures, while motional narrowing at room temperature contributes to a sharp signal at the lower field end of the powder spectrum, corresponding to an axially symmetric chemical shift tensor. Angular dependence studies on C₇SO₃F samples made from HOPG indicate that the majority of the intercalated SO₃F⁻ ions are oriented with their molecular C₃ symmetry axes parallel to the c axis of graphite, or normal to H₀. Multi-staged samples made from HOPG demonstrate the stage dependence of the chemical shift of intercalated SO₃F⁻ ions. The chemical shift of the stage-one material is observed in the region of 10 – 12 ppm, while higher-staged materials show resonances at less shielded regions.     

A potentiokinetic reactivation method for predicting the I.C.C. and I.G.S.C.C. sensitivity of stainless steels and alloys

The present paper is a continuation of an earlier study dealing with a new method of electrochemical determination of the sensitivity to intercrystalline corrosion of stainless steel, based on reactivation from the passive state. This suggested test method was verified on austenitic chromenickel steels with increased carbon content and cold deformation. The ratio of charge during reactivation to that in the active region of the polarization curve (at increasing potential), expressed as a percentage, appears to give the optimum quantitative criterion of the tendency of steels to intercrystalline corrosion or intergranular stress corrosion cracking. The sensitivity of the method can be adjusted for the individual types of steels and alloys by changing the experimental conditions.     

ICP-AES法同时测定金属镁中的铁硅铜铝镍锰

本文研究了在一定溴存在的条件下 ,试样以盐酸与硝酸溶解 ,用ICP—AES同时测定金属镁中Fe、Si、Cu、Al、Ni、Mn六种元素。为消除大量镁基体的干扰 ,本方法采用镁基做工作曲线 ,测定结果令人满意 ,完全可满足产品分析要求 ,方法简便可靠。     

我国石油专用管生产企业进行重组的思考及建议

通过对我国石油专用管业所面临的国际国内市场形势以及国际钢管企业重组的情况进展及特点的分析,认为重组已成为国际国内市场发展的必然趋势,企业重组不只出现在强势企业对弱势企业,强强联合也逐渐增多。对中国石油专用管生产企业的重组以及建议重组的原则、范围、方式及举措提出了见解。     

Some Impressions of Electroplating in U.S.A.

The development of electrochemical machining methods is described and it is shown how the original process was improved by the introduction of automatic methods of controlling the inter-electrode distance and by pressure-feeding the electrolyte. Factors of importance in governing the rate of metal removal and controlling the shape of the workpiece are detailed and illustrated by reference to electrode design, electrolyte composition and filtration methods.     

E. I. Malinkina and V. N. Lomakin The hardenability of steel

Metal Science and Heat Treatment -     

A.I.D. Testing and Application of Aircraft Finishes

The introduction of quaternary pyridinium derivatives as brightening agents for the electrodeposition of zinc from alkaline electrolytes was one of the most significant recent advances in this field. This work describes the brightening effect of quaternary pyrindium derivatives, which have differences in structure, on the zinc deposits obtained from alkaline cyanide and alkaline non-cyanide electrolytes. Chemical changes were found to be occurring to these organic compounds when used as addition agents in these electrolytes, which could be followed using ultra violet spectroscopy. Analysis of the data has enabled the kinetics of these reactions to be deduced and this together with relevant informaton from the literature has enabled the identity of the new species to be established.     

Professor R. N. Parkins Receives Whitney Award from N.A.C.E.

Abstract

In situ metallography has been used to study the effect of temperature on the microstructural changes on the outside surface of primary reformer tubes, used for the production of reformed gas suitable for ammonia synthesis in a 200 tonnes per day capacity ammonia plant. The outside skin temperature varied in the range of 860° to 1050°C. The studies indicated marked changes with increasing temperature in the size of grains and carbide morphology, i.e., the pattern and distribution of primary and secondary carbides.