Book Review: Chernov, Ya.B., Afinogenov, A.I., and Shurov, N.I., Borirovanie stalei v ionnykh rasplavakh (Boronizing of Steels in Ionic Melts)

Book Review: Chernov, Ya.B., Afinogenov, A.I., and Shurov, N.I., Borirovanie stalei v ionnykh... Russian Journal of Applied Chemistry, Vol. 75, No. 8, 2002, p. 1373. Translated from Zhurnal Prikladnoi Khimii, Vol. 75, No. 8, 2002, p. 1401. Original Russian Text Copyright C 2002 by Morachevskii. ˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝ BOOK REVIEWS ˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝˝ Chernov, Ya.B., Afinogenov, A.I., and Shurov, N.I., Borirovanie stalei v ionnykh rasplavakh (Boronizing of Steels in Ionic Melts), Yekaterinburg: Ur. Otd. Ross. Akad. Nauk, 2001, 223 pp. Systematic studies of steel boronizing with the alloying elements are incorporated into the composi- use of ionic melts have been carried out at the Insti- tion of borides, which makes higher their hardness tute of High-Temperature Electrochemistry, Ural Di- and wear resistance; however, alloying, as a rule, vision, Russian Academy of Sciences, since 1965. lowers the rate of boronizing, leads to build-up of The investigations were commenced by professor internal stresses, and enhances the tendency toward N.G. Ilyushchenko and are continued now by his pu- flaking-off of the boronized layer. The fifth chapter pils. The primary attention has been given to deposi- ( pp. 80 3113) describes the technology of liquid bo- tion of boride coatings on steels by liquid electroless ronizing, developed at the Institute of High-Temper- diffusion boronizing. The monograph presents the ature Electrochemistry, Ural Division, Russian Acad- physicochemical foundations of this method and the emy of Sciences, with the participation of the authors technology of coating deposition, and discusses the of the monograph. The electrolyte contains (wt %): properties of boride coatings and promising fields of sodium tetraborate 79, sodium chloride 15, amorphous their use. The book comprises an introduction, seven boron 6. The process temperature lies within 850 3 chapters, and list of references. 950oC. Data on how the thickness of the diffusion layer on steels of various brands depends on temper- The introduction ( pp. 3 37) notes that the diffusion ature and time of boronizing are presented. boronizing is one of the most effective and promising methods for surface strengthening of machinery and The sixth chapter ( pp. 1323180) is devoted to the tools. This procedure improves their wear resistance, properties of boride coatings: their structure, micro- surface hardness, and fatigue strength. The authors hardness, residual stresses, wear resistance, and cor- give a classification of the boronizing methods. The rosion resistance. The seventh chapter ( pp. 1813205) first chapter (pp. 8 323) is concerned with the physico- lists plants employing the technology of liquid bo- chemical foundations of the liquid boronizing tech- ronizing. The bibliography ( pp. 206 3221) contains nique. Various viewpoints concerning the mechanism references to 270 publications and patents, mainly of electroless boron transfer in ionic melts are ana- by domestic authors. lyzed. The authors note that boron transfer processes On the whole, the monograph has a technological are based on the same electrochemical reactions in- orientation. It includes various kinds of evidence con- volving boron ions in lower oxidation states. The very cerning processes of boronizing and, in the first place, small second chapter ( pp. 24 328) considers boroniz- the results of the studies performed at the Institute ing in halide and halide-oxide melts. Their main dis- of High-Temperature Electrochemistry, Ural Division, advantage is the relatively high volatility of boron ha- Russian Academy of Sciences. In our opinion, the lides and oxyhalides. The third chapter ( pp. 29 3 63) book pays insufficient attention to the theory of elec- discusses boronizing in oxide melts. The main com- troless boronizing, to which were devoted compre- ponent of the electrolyte is sodium tetraborate, to hensive and original investigations of Ilyushchenko which various compounds and, in particular, boron and co-workers, among whom were the authors of carbide B C are added. The material presented in the the monograph. Thermodynamic analysis of the pro- chapter is predominantly of formulation nature. cess virtually escaped the attention of the authors. The fourth chapter ( pp. 54 379) summarizes evi- Nevertheless, there is good reason to believe that the dence concerning the influence of various factors on book will promote wider use of boronizing techniques the boronizing kinetics, formation of the surface bo- at machine-building plants of the country. The authors ride layer, and its thickness. It is, in particular, men- present the technology of the process with exhaustive tioned that raising the content of carbon and alloying completeness. elements in steels hinders the diffusion of boron and A. G. Morachevskii leads to its accumulation in the surface layer. Some 1070-4272/02/7508-1373 $27.00 C 2002 MAIK [Nauka/Interperiodica] Russian Journal of Applied Chemistry Springer Journals

Book Review: Chernov, Ya.B., Afinogenov, A.I., and Shurov, N.I., Borirovanie stalei v ionnykh rasplavakh (Boronizing of Steels in Ionic Melts)

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Kluwer Academic Publishers-Plenum Publishers
Copyright © 2002 by MAIK “Nauka/Interperiodica”
Chemistry; Chemistry/Food Science, general
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