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近几十年来在冶金铸造工业中广泛采用了利用微量元素孕育钢液,改善钢的组织及各种性能。这些孕育剂的特点是它们与氧、硫、氮等元素有着较强的化学亲合力,而且生成熔点较高的氧化物、硫化物及氮化物。除了锆、钛、硼、钒等金属做为孕育剂外,稀土金属的应用引起了世界各国研究工作者的重视,并积极开展了这方面的研究。稀土金属在不锈钢中的应用,主要是改善其热加工性,但对铸钢各种性能的影响尚缺乏研究。由于我国石油、化工及国防工业的发展,不锈钢铸件的生产也日益扩大,因此,一方面应当积极开展新代用钢种的研究,以便节约我国的贵重稀缺元素——镍和路;另一方面则迫切需
In recent decades, metallurgy foundry industry widely used in the use of trace elements pregnant steel, improve the organization of steel and various properties. These inoculants are characterized by their strong chemical affinity with oxygen, sulfur, nitrogen and other elements, and the formation of higher melting point oxides, sulfides and nitrides. In addition to zirconium, titanium, boron, vanadium and other metals as inoculant, the application of rare earth metal has attracted the attention of researchers all over the world, and actively carry out research in this area. The application of rare earth metals in stainless steel, mainly to improve its hot workability, but the various properties of cast steel is still lack of research. Due to the development of China’s oil, chemical and defense industries, the production of stainless steel castings is also expanding day by day. Therefore, on the one hand, research on new-generation steel grades should be actively conducted so as to save precious and scarce elements in our country - nickel and road; on the other hand Urgent need