EFFECT OF CRYOGENIC TREATMENT ON TOOL STEEL (AISI- ¬D2)

Arvind Kaushal, S.K. Saluja, R.S.S. Rawat

Abstract: In present scenario modernization of machine tools is on prime consideration that is an optimization of desired properties in machine tool parts means alternation of properties for that previously we employed heat treatment of steel, thus we have some improved properties but does not achieved correct solution for the problem. In modern age a new technology is comes on the front line, recognize by Acronyms C.T.P. or Cryogenic treatment of steel which has been done in cooling Atmosphere below Atmospheric tem. About – 1960C or- 3100F. During this temp. Range conversion of Austenite to marten site takes place. Thus we have got increased some desirable properties like reduced wear & Tear. Increased Hardness Micro- structure improved, Stress relieving properties also improved. In this paper tool Steel AISI- D2 is used for cryogenic treatment & study is performed regarding Micro- structure and Hardness, after Cryogenic treatment comparison is also made with un-treated test specimen.

Keywords: AISI- D2, Cryogenic Treatment, Phase Transformation, Hardness, Micro- Structure

DOI: https://doi.org/10.15623/ijret.2015.0401057