منابع مشابه
Low-Temperature Carburization of Austenitic Stainless Steels
LOW-TEMPERATURE CARBURIZATION is a gaseous carburization process performed at atmospheric pressure, at temperatures where the kinetics of substitutional diffusion are very slow. Low-temperature carburization hardens the surface of austenitic stainless steels through the diffusion of interstitial carbon, without the formation of carbides. The surface must be activated, by modification and remova...
متن کاملKCL-TH-93-14 hep-th/9312010 PARAFERMIONS, W STRINGS AND THEIR BRST CHARGES
We show how to relate the parafermions that occur in the W 3 string to the standard construction of parafermions. This result is then used to show that one of the screening charges that occurs in parafermionic theories is precisely the non-trivial part of the W 3 string BRST charge. A way of generalizing this pattern for a W N string is explained. This enables us to construct the full BRST char...
متن کاملKühnel W . Color Atlas of Cytology , Histology , and Microscopic Anatomy , 4 th edition . Stuttgart
Field of medicine: Microscopic anatomy, histology, cytology, pathology. Format: Softcover. Audience: Teachers and students of medicine, dentistry, veterinary medicine, and biology; as well as clinicians and biomedical researchers working with human tissue or cell samples. Purpose: To provide an overview of the basic knowledge of microstructure of the human body. Structured as a companion atlas ...
متن کاملOptimized production route of WC powder pre-alloyed with Ta for fine grained cemented carbides
Article history: Received 30 March 2016 Received in revised form 13 May 2016 Accepted 22 May 2016 Available online 24 May 2016 Powders of hexagonal (W,Ta)Cwere produced following a two-step carburization processwith (W,Ta)2C powder as an intermediate product. XRD measurements indicate that higher temperatures during the first carburization step increase the fraction of Ta in the (W,Ta)2C struct...
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ژورنال
عنوان ژورنال: The Journal of the Japan Institute of Metals
سال: 1949
ISSN: 0021-4876
DOI: 10.2320/jinstmet1937.13.7_31