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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If the fluid is agitated cooling occurs even more quickly. The unit of hardenability is length. Subsequent to cooling a flat surface is ground on the test piece and the hardenability is then found by measuring the hardness along the bar.

FAQ Frequently asked questions Display options. The hardenability of a ferrous alloy is measured by a Jominy test: Writing tools A collection of writing tools that cover the many facets of English and French grammar, style and usage. 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. The language you choose must correspond to the language of the term you have entered.

Access a collection of Canadian resources on all aspects of English and French, including quizzes. Annealing Heat Treatment of Steels.


Language Portal of Canada Access a collection of Canadian resources on all aspects of English and French, including quizzes. Manufacturing Engineering and Technology. Steels with fine hardenability can be hardened more deeply below the surface and do not need high cooling rates. The fluid used for quenching the material influences the cooling rate due to varying thermal conductivities and specific heats.

When a hot steel work-piece is quenchedthe area in contact with the water immediately cools and its temperature equilibrates with the quenching medium. The hardenability of a metal alloy is the depth to which a material is hardened after putting mominy through a heat treatment process.

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A collection of writing tools that cover the many facets of English and French grammar, style and usage. Substances like brine and water cool the steel much more quickly than oil or air.

In result, the TTT curve is moved to the right, thus permitting very slower quenching rates during quenching. The hardenability of ferrous alloys, i. The Jominy end-quench test was invented by Walter E.

Hardenability is specified by the hardness of the specimen as a function of distance from quenched end Refer fig. Retrieved 9 December This page was last edited on 21 Augustat Hardenability does not refer to the most hardness that can be attained in the steels; that depends on the carbon content present in it.


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”. From Wikipedia, the free encyclopedia.

File:Essai – Wikimedia Commons

Precipitation hardening Heat treatment of steel. It should not be confused with hardnesswhich is a measure of a sample’s resistance to indentation or scratching. Hardenability refers to the comparative capacity of a steel to be hardened by transformation to martensite form. Heat Treatment Process of Steels.

The farther away from the quenched end that the hardness extends, the higher the hardenability. Modern materials and manufacturing processes.


Leave a Reply Cancel reply Your email address will not be published. The mainly common technique for measuring hardenability is the Jominy end-quench test. Jominy served as president of ASM in Views Read Edit View history. Jominy and A. It is a property that determines the depth under the quenched surface to which the steel is hardened well, or the severity of the quench necessary to achieve a definite hardness penetration.