提高冷却速度和降低终冷温度可以增加针状铁素体的比例。
The ratio of acicular ferrite may increase by raising cooling speed and decreasing final cooling temperature.
通过高温熔融，对同结线附近一系列硅酸盐熔体进行淬冷或不同速度冷却。
From high-temperature molten, a series of silicate melts near cotectic-line were quenched or cooled with different rate.
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