Abstract
The Effect of Heat Treatment on Dynamic Strain Aging Behaviour of AISI H10 Hot Work Tool Steel
Highlights
The steels used for hot forming is a special type of tool steel, made to withstand a combination of heat, pressure and abrasion and has been classified hot work tool steel, AISI type H
It was observed that carbides are distributed more homogenously when the testing temperature is increased to 200°C, 400°C or 700°C (Figs. 2b, 2c and 2d)
The results indicated that AQ samples are more susceptible to Dynamic strain aging (DSA) than AR samples
Summary
The steels used for hot forming is a special type of tool steel, made to withstand a combination of heat, pressure and abrasion and has been classified hot work tool steel, AISI type H. In order to obtain secondary hardening during tempering, austenitisation should be designed to put higher amount of alloy and C in solution as much as possible, while avoiding abnormal grain growth and excessive retained austenite These informations are important in designing hot work schedules and heat treatments for annealing and hardening[4,5]. DSA may induce negative strain rate sensitivity and may even cause flow limitation in cold and warm areas during plastic deformation For this reason, effect of the DSA on deformation pattern and mechanical properties are important for the correct design of the metal forming process[8]. Literature survey indicated that there are considerable information relating to the effect of carbide forming elements on high temperatures mechanical properties of hot work tool steels. The occurrence of DSA and its effects on microstructure and strength of H10 hot work tool steel are investigated under AR and AQ conditions in the present study
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