Jominy end-quench test P. Le Masson, P. Rogeon, D. Carron, J.J. QuemenerIdentification du coefficient de transfert lors d’un essai Jominy instrumenté. Steel — Hardenability test by end quenching (Jominy test). Acier — Essai de trempabilité par trempe en bout (essai Jominy). Provläsningsexemplar. Project Number: Jominy End Quenching of Steel: The Effect of Time and Temperature on Austenitic Grain Growth. A Major Qualifying Project Report.

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Hardenability – Wikipedia

Access a collection of Canadian resources on all aspects of English and French, including quizzes. History of Wind Energy Wind Power. Change the order of display of the official languages of Canada English first French first Option to display the non-official languages Spanish or Portuguese Neither Spanish Portuguese Display definitions, contexts, etc.

Your email address will not be published. In result, the TTT curve is moved to the right, thus permitting very slower quenching rates during quenching. Glossaries and vocabularies Access Translation Bureau glossaries and vocabularies.

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Views Read Edit View history. The hardenability of a ferrous alloy is measured by a Jominy test: In which subject field?

This page was last edited on 21 Augustat The Jominy end-quench test was invented by Walter E. It is an indication of how deep into the material a certain hardness can be achieved.

Jominy served as president of ASM in The inner depths of the material however, do not cool so rapidly, and in work-pieces that are large, the cooling rate may be slow enough to allow the austenite to transform fully into a structure other than martensite or bainite.


This results in a work-piece that does not have the same crystal structure throughout its entire depth; with a softer core and harder “shell”. Hardenability is specified by the hardness of the specimen as a function of distance from quenched end Refer fig. FAQ Frequently asked questions Display options.

Hardenability does not refer to the most hardness that can be attained in the steels; that depends on the essao content present in it.

Retrieved 9 December In other projects Wikimedia Commons. When a hot steel work-piece is quenchedthe area in contact with the water immediately cools eszai its temperature equilibrates with the quenching medium. If the fluid is agitated cooling occurs even more quickly.

A collection of writing tools that cover the many facets of English and French grammar, style and usage. The cooling rate will be highest at the end being quenched, and will decrease as distance from the end increases. Substances like brine and water cool the steel much more quickly than oil or air.

The farther away from the quenched end that the hardness extends, the higher the hardenability. Language Portal of Canada Exsai a collection of Canadian resources on all aspects of English and French, including quizzes. Heat Treatment Process of Steels.

Heat Treatment Methods of steel. Leave a Reply Cancel reply Your email address will not be published. Introduction to Forging Bulk Deformation of Metals. Precipitation hardening Heat treatment of steel. The mainly common technique for measuring hardenability is the Jominy end-quench test. The unit of hardenability is length. This information is plotted on a hardenability graph.


Modern materials and manufacturing processes. Alloying elements having the greatest result are chromium, manganese, molybdenum and nickel, to a lesser extent. Therefore, the cooling curve is able to follow a less hastened path to the Ms line, more simply avoiding the nose of the TTT curve. A laboratory procedure for determining the hardenability of a steel or other ferrous alloy; widely referred to as the Jominy test.

From Wikipedia, the free encyclopedia. The fluid used for quenching the material influences the cooling rate due to varying thermal conductivities and specific heats. By using this site, you agree to the Terms of Use and Privacy Policy.

It should not be confused with hardnesswhich is a measure of a sample’s resistance to indentation or scratching. Retrieved from ” https: Annealing Heat Treatment of Steels. The mechanism by which these alloying elements operate is to expand the time before the start of the austenite-to-pearlite transformation in the TTT diagram.

Jominy and A. A hardenability test in which a steel bar is heated to the desired austenitizing temperature and quench-hardened at one end and then measured for hardness along its length, beginning at the quenched end.