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分析了X80级钢的化学成分和金相组织。
It analyses the chemical composition and metallographic structure of grade X80 steel.
研究了石油钻铤用钢的化学成分及其对性能的影响，并优化了热处理工艺。
In this paper, the effects of chemical composition of the steel for oil drill collar on its properties were studied and the heat treatment process were optimized.
设计了新型低镍铸造不锈钢的化学成分，研究了该钢的组织及其腐蚀与磨蚀行为。
The chemical composition of new type low nickel cast stainless steel is designed. The microstructure, corrosion behavior and erosion corrosion behavior of the steel are studied.
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