Essays about: "prior austenite grain size"

Found 4 essays containing the words prior austenite grain size.

  1. 1. DILATOMETRIC EVALUATION OF SOME CRITICAL PHYSICAL PROPERTIES OF OT75 AND OT101 STEEL GRADES

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Wrya Mohamadian; [2021]
    Keywords : Steels; Martensite; Ms; Quenching; Heat treatment; Dilatometer; Mechanical property; Critical temperature; Phase transformation; hardness.;

    Abstract : Due to its hardness, martensite, perhaps, is the most desirable structure, but at the same time, martensite is very brittle. Balancing between hardness and brittleness is a challenge that steel manufacturers must deal with it. To decrease brittleness and to solve this problem, designers purposely temper the steel. Heat treatment, e. READ MORE

  3. 2. Thermodynamic modelling ofmartensite start temperature in commercial steels

    University essay from KTH/Materialvetenskap

    Author : Arun Kumar Gulapura Hanumantharaju; [2018]
    Keywords : Martensite start temperature; Thermodynamic modelling; Austenite grain size; Epsilon martensite; CALPHAD;

    Abstract : Firstly, an existing thermodynamic model for the predicting of martensite start temperature of commercial steels has been improved to include more elements such as N, Si, V, Mo, Nb, W, Ti, Al, Cu, Co, B, P and S and their corresponding composition ranges for Martensitic transformation. The predicting ability of the existing model is improved considerably by critical assessment of different binary and ternary systems i. READ MORE

  4. 3. Austenite grain growth in bearing steels : An investigation on steel grades 100Cr6 and 100 CRMnMoSi8-4-6

    University essay from KTH/Materialvetenskap

    Author : Erik Persson; [2014]
    Keywords : Grain growth; Grain size;

    Abstract : An investigation of austenite grain growth of two bearing steel grades; 100Cr6 and100CrMnMoSi8-4-6 is performed. Austenitization treatments were performed between 860°C and 1200 °C for 5 minutes to 5 hours and the grain size was determined for each sample.Grain boundary etching was carried out using a water based, picric-acid etchant. READ MORE

  5. 4. The effect of prior austenite grain size on the machinability of a pre-hardened mold steel. : Measurement of average grain size using experimental methods and empirical models.

    University essay from Avdelningen för maskin- och materialteknik

    Author : Muhammad Aatif Irshad; [2011]
    Keywords : prior austenite grain size; machining; mold steels; pre-hardened mold steels; work hardening; retained austenite; metallography; tool steels; chemical etching; prior austenite grains; lath martensite; rough machining; finish machining; Metallographic specimen preparation; Austenite grain growth; cutting tool; cutting tool life; wear; Theoretical average chip thickness;

    Abstract : The use of pre-hardened mold steels has increased appreciably over the years; more than 80% of the plastic mold steels are used in pre-hardened condition. These steels are delivered to the customer in finished state i.e. there is no need of any post treatment. READ MORE