| 摘要 |
An untempered low alloy high tension steel plate has the composition of: 0.04-0.20 wt.% C, below 0.50% Si, 0.05-2.00 wt.% Mn, 0.01-0.10 wt.% Al and below 0.03 wt.% Ti, and the carbon equivalent of 0.30- 0.33. The steel plate is characterized by being produced from controlled cooling with the cooling rate of 10-15oC/sec from 780-820oC to 480-520oC after pressing. The process can avoid the reduction of productivity.
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