| While working on a sermon the pastor heard a knock at his office door. "Come in," he invited. A sad-looking man in threadbare clothes came in, pulling a large pig on a rope. "Can I talk to you for a minute?" asked the ma... Read more of How To Bathe A Cat at Free Jokes.ca |  InformationalPrivacy |
Steel MakingHardening OperationHardening a gear is accomplished as follows: The gear is tak... Annealing Of High-speed Steel For annealing high-speed steel, some makers recommend using g... Quality And Structure The quality of high-speed steel is dependent to a very great ... Placing The Thermo-couples The following illustrations from the Taylor Instrument Compan... Properties Of Alloy Steels The following table shows the percentages of carbon, manganes... Annealing ANNEALING can be done by heating to temperatures ranging from... Mushet And Bessemer That Mushet was "used" by Ebbw Vale against Bessemer is, perh... A Chromium-cobalt Steel The Latrobe Steel Company make a high-speed steel without tun... Composition Of Transmission-gear Steel If the nickel content of this steel is eliminated, and the pe... Preventing Decarbonization Of Tool Steel It is especially important to prevent decarbonization in such... Quenching It is considered good practice to quench alloy steels from th... Nickel Nickel may be considered as the toughest among the non-rare a... The Leeds And Northrup Potentiometer System The potentiometer pyrometer system is both flexible and subst... Application To The Automotive Industry The information given on the various parts of the Liberty eng... Effect Of A Small Amount Of Copper In Medium-carbon Steel This shows the result of tests by C. R. Hayward and A. B. Joh... Heat Treatment Of Steel Heat treatment consists in heating and cooling metal at defin... The Effect The heating at 1,600 deg.F. gives the first heat treatment w... Steel Before The 1850's In spite of a rapid increase in the use of machines and the ... Annealing Of Rifle Components At Springfield Armory In general, all forgings of the components of the arms manufa... Fatigue Tests It has been known for fifty years that a beam or rod would fa... |
Steel Can Be Worked ColdCategory: THE FORGING OF STEEL As noted above, steel can be worked cold, as in the case of cold-rolled steel. Heat treatment of cold-worked steel is a very delicate operation. Cold working hardens and strengthens steel. It also introduces internal stresses. Heat-treatments are designed to eliminate the stresses without losing the hardness and strength. This is done by tempering at a low heat. Avoid the blue range (350 to 750 deg.C.). Tempering for a considerable time just under the critical is liable to cause great brittleness. Annealing (reheating through the critical) destroys the effect of cold work. Next: Forging High-speed Steel Previous: Steel Worked In Austenitic State
Viewed 918 |
||||||||||||||||||||
