The invention relates to a method for making a titanium-based automotive engine valves using powder metallurgy process, and the automotive engine valve stem, engine valve and method of producing both.
本发明涉及利用粉末冶金工艺制造钛基汽车发动机气门的方法。公开了汽车发动机气门杆、发动机气门以及二者的制造方法。
There will be China 'booming market demand for such big-caliber metallurgical valves as metallurgy and low-pressure environmental protection project etc.
中国国内市场需求旺盛，特别是对冶金类、低压环保工程类大口径阀门需要量潜力巨大。
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