Essays about: "tempering furnace"

Found 4 essays containing the words tempering furnace.

1. 1. Evaluation of the impact of different heat treatments on the toughness and tempering resustance for a Cr-Mo-V hot-work tool steel

   University essay from KTH/Materialvetenskap

   Author : Nathalie Hovd Schmidt; [2016]
   Keywords : ;

   Abstract : High Pressure Die Casting (HPDC) has very high demands on toughness and tempering resistance of the tool. A typical hardening cycle for this purpose consists on austenitizing and quenching in a vacuum furnace followed by three temperings at 600°C. READ MORE

3. 2. Development of a heat treatment method to form a duplex microstructure of lower bainite and martensite in AISI 4140 stee

   University essay from KTH/Materialvetenskap

   Author : Erik Claesson; [2014]
   Keywords : AISI 4140; 326C; 326F; Isothermal heat treatment; Martensite; Bainite; Molten salt; vacuum furnace; gas quenching.;

   Abstract : Research on bainite and martensite structures has indicated that lower bainite needles have a refining effect on the lath martensitic structure. Lower bainte needles partitions prior austenite grains and will consequently have a refining effect on the subsequent formed lath martensite. READ MORE

4. 3. Hydrogen uptake during Carburizing and Effusion of Hydrogen at Room Temperature and during Tempering

   University essay from KTH/Materialvetenskap

   Author : Maryam Khodahami; [2013]
   Keywords : hydrogen; case hardening; gas carburizing; tempering; hydrogen embrittlement; hydrogen diffusion;

   Abstract : The carburizing atmosphere during the case hardening process contains a large proportion of hydrogen. Due to the rapid diffusion of hydrogen a high amount of hydrogen can be absorbed by the carburizing component. The amount of absorbed hydrogen is dependent on some factors such as for example the carburizing time and component dimensions. READ MORE

5. 4. Increase the capacityof continuous annealing furnaces at Ovako

   University essay from KTH/Materialvetenskap

   Author : v Dahlqvist; [2012]
   Keywords : Soft annealing; spheroidization; heat treatment; OVAKO; capacity ncrease; productivity; continuous furnace; normalization; isothermal annealing; quench and tempering; tubemill; COMSOL; simulation.;

   Abstract : The capacity of soft annealing of low alloyed tubes at Ovako’s continuous annealing furnaces have been evaluated by comparing how it is done today with information from published and internal articles on the subject. It was found that it is possible to reduce the cycle time by 30 % for one furnace, 55 % for one furnace and 72 % for two furnaces. READ MORE