但用来制造管道的钢中通常掺入了合金成分钴来增强材料的强度。
The steel used in the pipes, however, is usually alloyed with cobalt to make it stronger.
可以用于铸造的材料类型有：铝合金、青铜、工具钢、不锈钢、钨铬钴合金、镍基合金和贵金属。
Thee types of materials that can be cast are aluminum alloys, bronzes, tool steels, stainless steels, stellite, hastelloys, and precious metals.
含钴高速钢采用特定的热处理工艺处理，可充分发挥材料的潜在性能，显著提高其强韧性。
Special heat treating process will bring latent properties of high speed steel with Co into full play and obviously improve its strength and toughness.
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