Principles And Construction of Machinery a Practical Treatise On the Laws of Th
Principles And Construction of Machinery a Practical Treatise On the Laws of Th
Francis Campin
The book Principles And Construction of Machinery a Practical Treatise On the Laws of Th was written by author Francis Campin Here you can read free online of Principles And Construction of Machinery a Practical Treatise On the Laws of Th book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Principles And Construction of Machinery a Practical Treatise On the Laws of Th a good or bad book?
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The steely surface thus obtained is not nearly so good and durable as steel made in the usual way and ham- mered, and generally the cementation does not pene- trate to a depth of more than one- sixteenth of an inch; nor is it necessary that it should do so, as the object of case-hardening is to increase the durability of the surface without impairing the general strength and toughness of the article operated upon. OF MACHINERY. 167 The introduction of cheap steel has done much to decrease the p...ractice of case-hardening certain small articles of manufacture. According to Dr. Thompson's analysis of some cast-steel from a manufactory near Glasgow, it contains a very slight proportion of silicon, but this does not appear to be essential. The composi- tion of the sample was Parts. Iron 99 Carbon with some silicon . . 1 100 This very nearly corresponds to the formula, Fe2o C. , which would give Parts. Parts. Iron . . 28 X 20 = 560 . . 98-94 Carbon ... 6 . 1-Q6 100-00 COPPER is the next material demanding attention.
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