Measurement device and measurement method for interface heat exchange coefficients and material heat conductivity
A technology of interface heat transfer coefficient and measuring device, which is applied in the direction of material thermal conductivity, etc.
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Embodiment 1
[0083] Embodiment 1: The thermal conductivity measurement of casting sample
[0084] A. The selection of the third combined sample 21 and the setting of the thermocouple 5:
[0085] The standard sample 211 is a cylindrical brass with a diameter of 50 mm and a length of 75 mm, and the third casting sample 213 is a cylindrical A357 aluminum alloy with a diameter of 50 mm and a length of 60 mm; the lower surface of the standard sample 211 is the same as the third casting sample. The contact side of sample 213 should be smooth enough to reduce the influence of surface roughness on test results.
[0086] In order to accurately obtain the axial temperature inside the third combined sample 21, four blind holes for installing thermocouples 5 are provided at equal intervals (15mm apart) on the outer surface of the standard sample 211, and in the third casting sample 213 Three blind holes for installing thermocouples 5 are opened on the outer surface at equal intervals (15 mm interval)...
Embodiment 2
[0102] Embodiment 2: the thermal conductivity measurement of mold sample
[0103] A, the third casting sample 213 in embodiment 1 is replaced by the third mold sample 212, the third mold sample 212 is a cylindrical H10 steel with a diameter of 50 mm and a length of 60 mm, considering the thermal conductivity It belongs to the internal nature of the material, so its surface does not need to be sprayed with surface mold coating.
[0104] Then proceed according to Parts B and C in Example 1 to measure the thermal conductivity of the third mold sample 212 at each set heating temperature.
Embodiment 3
[0105] Embodiment 3: the measurement of solid-solid interface heat transfer coefficient
[0106] A. The selection of the first combined sample 3 and the setting of the thermocouple 5:
[0107] The first casting sample 302 is a cylindrical A357 aluminum alloy with a diameter of 50 mm and a length of 60 mm; the first casting sample 301 is a cylindrical H10 steel with a diameter of 50 mm and a length of 75 mm, and the mold coating 22 on the surface is sprayed The surface of the first mold sample 301 in contact with the first casting sample 302 must be smooth enough to reduce the impact of surface roughness on the test results.
[0108] In order to accurately obtain the axial temperature inside the first composite sample 3, four blind holes for installing thermocouples 5 are provided at equal intervals (15 mm apart) on the outer surface of the first casting mold sample 301. Three blind holes for installing thermocouples 5 were opened on the outer surface of sample 302 at equal in...
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