ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The heavy 125MN Plunger is weight 140 ton, its heat treatment process include two part,one is heat and another is quenching in order to attain certain hardness on its surface and toughnesson its body. Differential temperature heat process were made in well resistance furnace, the heattime include warm-up and holding period and high-speed increasing period. The total time is about30-40 hours.The differential heat treatment process is an essential step in the production of heavyplunger, and it determines the hardness distribution on the sample surface. In this paper, a programto calculate real-time temperature during the heat treatment process was developed based on a greatdeal of experiments. Using this subroutine program the temperature field of hollow heavy plungerduring differential heat treatment process was calculated. The result shows that the simulatedtemperature was agreed with the real temperature in the warm-up and holding period of the heattreatment process. In the calculation temperature field ,based on the convectional heat transfercoefficient and radiate heat transfer coefficient, the corrected heat transfer coefficient wereinduced to compose comprehensive heat transfer coefficient. The temperature predicted in warm-upand holding period were correct, the error was below 1%. At the high-speed increasing period, thetime when the external temperature reach enacting was predict accurately. So the computersimulation can give real time prediction to decide parameters of the heat treatment process. Theresult also show that the program developed is sample and applied , it fit for predicting temperatureat workshop real time and it is available to deal with complex process
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.1129.pdf
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