Method and apparatus of evaluating mechanical properties of stee

Details Method and apparatus of evaluating mechanical properties of stee Method and apparatus of evaluating mechanical properties of stee

1984-10-18

1988-01-12

Lall, Parshotam S.

Boots, shoes, and leggings

364507, 364551, 364552, 73 78, 73760, 73826, G06G 768, G06F 1520, G01N 300, G01N 308

Patent

active

047195835

ABSTRACT:
In order to evaluate the mechanical properties of steel, empirical equations showing the relationship between each of the tensile strength, yield point and elongation of steel and its hardness, grain size and chemical composition are determined in advance based on experimental results. Then, the hardness, grain size and chemical composition of the steel to be evaluated are determined. The tensile strength, yield point and elongation of the steel to be evaluated are determined by inserting the determined hardness, grain size and chemical composition in the empirical equations. In determining the energy absorbed according to a method of this invention, empirical equations showing the relationship between each of the shelf energy, transition temperature and temperature range of the energy transition region of steel and its hardness, grain size and chemical composition are determined in advance. Then, the hardness, grain size and chemical composition of the steel to be evaluated are determined. The shelf energy, transition temperature and temperature range of the energy transition region of the steel to be evaluated are then derived by inserting the determined hardness, grain size and chemical composition in the empirical equations. Finally, the energy absorbed at a given temperature is derived from the shelf energy, transition temperature and temperature range of the energy transition region thus determined.

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