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03473 PROPOSED STANDARD CARBURIZATION TEST METHOD

A standard carburization test method has been developed that will allow investigators to generate carburization data under uniform, repeatable test parameters and procedures. Test results are discussed with particular reference to test parameters and procedures, as well as the methods of sample evaluation.

 

Product Number: 51300-03473-SG
ISBN: 03473 2003 CP
Author: George Lai, H. Lee Craig, Bingtao Li and Brian Gleeson
Publication Date: 2003
Industry: Test Method
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A standard carburization test method has been developed that will allow investigators to generate carburization data under the same test parameters and procedures. By using such a standardized test, users can cross-check and compare data from different sources when selecting a candidate alloy or alloys. The test method is simple, and can be performed reliably and consistently by laboratories without such equipment as gas chromatograph, dew point hygrometer or oxygen probe. The test is conducted at 982° C (1800° F) for 96 hours in H2 containing 2% CH4. A given test involves a total of twelve (12) specimens, i.e., four (4) rows of three, with the test specimens cycling to room temperature every 24 hours in order to rotate positions. With strict recommended procedures, along with specimen rotation and a control specimen at each row, the tests can be performed reliably and consistently in a normal tube furnace. Methods of sample evaluation are also recommended for assessing the degree of carburization. Test results are discussed with particular reference to test parameters and procedures, as well as the methods of sample evaluation.

Keywords: carburization, standard test method, test procedures, performance ranking, Fe-base alloys, Ni-base alloys

A standard carburization test method has been developed that will allow investigators to generate carburization data under the same test parameters and procedures. By using such a standardized test, users can cross-check and compare data from different sources when selecting a candidate alloy or alloys. The test method is simple, and can be performed reliably and consistently by laboratories without such equipment as gas chromatograph, dew point hygrometer or oxygen probe. The test is conducted at 982° C (1800° F) for 96 hours in H2 containing 2% CH4. A given test involves a total of twelve (12) specimens, i.e., four (4) rows of three, with the test specimens cycling to room temperature every 24 hours in order to rotate positions. With strict recommended procedures, along with specimen rotation and a control specimen at each row, the tests can be performed reliably and consistently in a normal tube furnace. Methods of sample evaluation are also recommended for assessing the degree of carburization. Test results are discussed with particular reference to test parameters and procedures, as well as the methods of sample evaluation.

Keywords: carburization, standard test method, test procedures, performance ranking, Fe-base alloys, Ni-base alloys

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