| —Sunday —Rest A Talk on Sunday Observance and Its Relation to the Christian Life. THE LESSON—That the things we think and do on the Lord's day are a true index of our character. The importance of the matter of Su... Read more of Warmth And Coldness at How to Draw.ca |  InformationalPrivacy |
Steel MakingSteel Before The 1850'sIn spite of a rapid increase in the use of machines and the ... Rate Of Cooling At the option of the manufacturer, the above treatment of gea... Double Annealing Water annealing consists in heating the piece, allowing it to... Tungsten Tungsten, as an alloy in steel, has been known and used for a... High-carbon Machinery Steel The carbon content of this steel is above 30 points and is ha... Annealing Method Forgings which are too hard to machine are put in pots with ... Surface Carburizing Carburizing, commonly called case-hardening, is the art of pr... Temperature Recording And Regulation Each furnace is equipped with pyrometers, but the reading an... The Effect Of Tempering On Water-quenched Gages The following information has been supplied by Automatic and ... Tempering Round Dies A number of circular dies of carbon tool steel for use in too... Oil-hardening Steel Heat slowly and uniformly to 1,450 deg.F. and forge thorough... Placing The Thermo-couples The following illustrations from the Taylor Instrument Compan... Tempering Colors On Carbon Steels Opinions differ as to the temperature which is indicated by t... Steel Can Be Worked Cold As noted above, steel can be worked cold, as in the case of ... Knowing What Takes Place How are we to know if we have given a piece of steel the ver... Quenching The Work In some operations case-hardened work is quenched from the bo... Hardening Carbon Steel For Tools For years the toolmaker had full sway in regard to make of st... Hints For Tool Steel Users Do not hesitate to ask for information from the maker as to t... Take Time For Hardening Uneven heating and poor quenching has caused loss of many ve... Preventing Decarbonization Of Tool Steel It is especially important to prevent decarbonization in such... |
Heat Treatment Of SteelCategory: HEAT TREATMENT OF STEEL Heat treatment consists in heating and cooling metal at definite rates in order to change its physical condition. Many objects may be attained by correct heat treatment, but nothing much can be expected unless the man who directs the operations knows what is the essential difference in a piece of steel at room temperature and at a red heat, other than the obvious fact that it is hot. The science of metallography has been developed in the past 25 years, and aided by precise methods of measuring temperature, has done much to systematize the information which we possess on metallic alloys, and steel in particular. Next: Critical Points Previous: Blending The Compound
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