Micron/nano metallurgical addition agent

Abstract

A micron / nanometer metallurgical addition agent is prepared as the following steps: evenly mixing micron powder, nano powder and metal powder by ball milling, wherein the metal powder serves as an adhesive and is briquetted, the weight ratio of the metal powder and micron powder to nano powder is (4-10):1, and the micron powder and nano powder utilize metal oxides such as Al2O3 powder, ZrO2 powder, CaCO3 powder, CaO powder and the like, or metal nitrides such as TiN powder, AlN powder and the like, or metal powder carbides such as WC powder, SiC powder and the like, or metal power such as Ca powder, Al powder, Mg powder and the like or alloy powder, or micro / nano carbon powder, fiber powder, etc. The metal powder serving as the adhesive comprises components which are the same as or similar to the components of a product matrix, does not pollute melt and only plays a carrier role. The addition agent is rushed into melt by high temperature melt and is evenly dispersed by the impact and stirring functions of the melt, and the addition agent also can be added in the melt by an injection method or an insertion method.

Description

technical field [0001] The invention belongs to the field of metallurgy and provides an additive for adding micron powder and nano powder to a high-temperature metallurgical melt and an adding process. Background technique [0002] A large number of research work and published literature at home and abroad show that the micro-phase and nano-phase in metal materials have an important impact on the inclusions and organizational structure in the material, thus significantly affecting the properties of the material. Japanese scholar Shuai first proposed the oxide metallurgy of steel, which shows that metallurgists pay great attention to the micro-phase and nano-phase in steel. Many colleges and universities and large iron and steel enterprises in our country are also carrying out research work on oxide metallurgy, such as: Beijing University of Science and Technology, Northeastern University, Baoshan Iron and Steel Company, Wuhan Iron and Steel Company, etc. are all carrying out...

AI Technical Summary

Problems solved by technology

Some work is also trying to directly add micron powder or nano powder into the high temperature metallurgical melt from the outside by direct injection method or direct wire feeding method. The blowing method is difficult to blow micron powder and nano powder into the high temperature metallurgical melt, and the direct blowing method seriously pollutes the environment, and the absorption rate of the metallurgical melt to the micron powder and nano powder is very low, so the direct blowing method cannot Application in production

The direct wire feeding method is to wrap the micron powder or nano powder naked in the metal wire and insert it into the metallurgical melt. This method makes the micron powder or nano powder sintered into large particles, increases the large inclusions in the material, and the large inclusions reduce the material Even if occasionally some micron powder or nano powder can enter the melt, its distribution is very uneven, so the direct wire feeding method to insert micron powder or nano powder into the metallurgical melt has not been successful.