Numerical and Experimental Research on Cold Compression Deformation Method for Reducing Quenching Residual Stress of 7A85 Aluminum Alloy Thick Block Forging

Table 2

Thermal conductivity and thermal expansion coefficient of 7A85 aluminum alloy.

Temperature (°C)	15	100	200	300	400	550
Heat capacity (J/g·°C)	1.02	0.95	1.1	1.07	1.24	1.07
Conductivity (W/m°C)	185.3	182.0	217.3	218.2	228.1	187.2
Expansion (10^−6/°C)		24.3	25.9	26.7	28.2