Essays about: "Austenite grain size"

Showing result 1 - 5 of 6 essays containing the words Austenite grain size.

  1. 1. Air Cooling Analysis of Forged Bearing Steels

    University essay from Uppsala universitet/Tillämpad materialvetenskap

    Author : Mattias Sörlander; [2022]
    Keywords : Material; Bearing steel; Cooling;

    Abstract : This thesis work was done in cooperation with Ovako Sweden AB in Hofors to better understand and improve cracking-related problems in bearing ring production and cooling after forging in particular. This goal was achieved by doing a literature search and executing cooling experiments in live production. READ MORE

  3. 2. 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

  4. 3. Casting and Characterization of Advanced High Strength Steels

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Daniel Hedman; [2020]
    Keywords : AHSS; characterization; casting; parlite; austenite; martensite; ferrite; grain size;

    Abstract : The Latin American steel making company Ternium S.A. aims to develop and produce a new type of advanced high strength steel (AHSS) in which the main alloying elements are carbon, aluminium, manganese, and silicon. READ MORE

  5. 4. 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

  6. 5. 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