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Institute Kemal Kapetanović, University of Zenica , Zenica , Bosnia and Herzegovina
FACULTY OF ENGINEERING AND NATURAL SCIENCES, University of Zenica , Zenica , Bosnia and Herzegovina
South campus, College of Engineering Material Research Centre Khartoum Sudan , Sudan University of Science and Technology , Khartoum , Sudan
Application of the new materials in the automotive industry is a challenge that is placed in front of
researchers of our times. The challenge is reflected in the modification of the chemical composition of
steel and heat treatment in order to achieve improved mechanical properties. Steel 17-7PH is
austenitic - martensitic steel with high strength (750-1500 MPa) and hardness (34-49HRC), which is
achieved by controlled phase transformation and complex heat treatment of precipitation
strengthening. The paper will present the results of testing the hardness and microstructure of
semiaustenitic precipitation strengthening stainless steel 17-7PH with modified chemical composition,
by standard prescribed heat treatment TH 1050 and modified heat treatment RH 950.
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