A thin piece of 0.3mm thick hot-rolled strip of 1080 steel is heat-treated in the following...
A thin piece of 0.3mm thick hot-rolled strip of 1080 steel is heat-treated in the following way. Use the IT diagram for steel and other knowledge to determine the microstructure of the steel sample after the heat treatment. Heat Treatment: Heat for 1 hour at 860 oC ; cool in a molten salt bath at 260 oC and keep it in the bath for 1 minute then cool it in air, this results in a ______________ microstructure and this heat treatment would be called _______________ .
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A thin piece of 0.3mm thick hot-rolled strip of 1080 steel is
heat-treated in the following...
7. Different time-temperature cooling paths for a 1080 steel on an isothermal transformation diagram will produce...
7. Different time-temperature cooling paths for a 1080 steel on an isothermal transformation diagram will produce different microstructures. Use the IT diagram and other knowledge to determine the microstructure of the steel samples after each heat treatment. In each case assume that the specimen begins at 860ºC and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure. (10 points) (1) Water-quench Ai 700 (2) Water-quench; reheat 1 h at 200°C,...
Problem 4 The TTT (isothermal transformation) diagram for an iron-carbon alloy with eutectoid 0.78 wt. %...
Problem 4 The TTT (isothermal transformation) diagram for an iron-carbon alloy with eutectoid 0.78 wt. % C composition is shown on the next page. Describe the microstructure present in a thin strip of 1080 steel (0.80 wt. % C, approximately eutectoid composition) after each step of the following treatments. Assume that the steel is initially 100 % in the austenite phase due to prior homoge- nization by holding at 871 °C for 1 h. (a) Quench in lead at 704...
I need help to write a nice introduction for experiment 6 please ( no hands write ) typing Thank you HEAT TREATMENT OF STEELS EXPERIMENT 6 EXPERIMENT 6 HEAT TREATMENT OF STEELS THEORY The Ef...
I need help to write a nice introduction for experiment 6
please ( no hands write ) typing
Thank you
HEAT TREATMENT OF STEELS EXPERIMENT 6 EXPERIMENT 6 HEAT TREATMENT OF STEELS THEORY The Effect of Cooling Rate One of the most convenient methods for controlling the properties of a given steel, i.e., a steel whose composition is already fixed, consists of austenizing the steel and ten cooling to room temperature at some predetermined rate. A variation of cooling rates...
7. Different time-temperature cooling paths for a 1080 steel on an isothermal transformation diagram will produce different microstructures. Use the IT diagram and other knowledge to determine the microstructure of the steel samples after each heat treatment. In each case assume that the specimen begins at 860ºC and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure. (10 points) (1) Water-quench Ai 700 (2) Water-quench; reheat 1 h at 200°C,...
Problem 4 The TTT (isothermal transformation) diagram for an iron-carbon alloy with eutectoid 0.78 wt. % C composition is shown on the next page. Describe the microstructure present in a thin strip of 1080 steel (0.80 wt. % C, approximately eutectoid composition) after each step of the following treatments. Assume that the steel is initially 100 % in the austenite phase due to prior homoge- nization by holding at 871 °C for 1 h. (a) Quench in lead at 704...
I need help to write a nice introduction for experiment 6
please ( no hands write ) typing
Thank you
HEAT TREATMENT OF STEELS EXPERIMENT 6 EXPERIMENT 6 HEAT TREATMENT OF STEELS THEORY The Effect of Cooling Rate One of the most convenient methods for controlling the properties of a given steel, i.e., a steel whose composition is already fixed, consists of austenizing the steel and ten cooling to room temperature at some predetermined rate. A variation of cooling rates...
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