所属分类：公司动态 发布时间：2021-04-21 13:47:08 来源：http://www.lcnmb500.com 浏览量：
Low phosphorus, low sulfur, low titanium, low aluminum, low nitrogen, low oxygen and low hydrogen are specified for manganese nonferrous metals. The quality of today's Manganese non-ferrous metals can not meet the requirements of steel varieties. The key product quality problems are: high content of Ti, Al, P, O, N and h in manganese ferrosilicon alloy; high content of P, s, O, N and h in medium and low carbon environmental manganese non-ferrous metals. It is necessary to improve the control of various residues in manganese nonferrous metals
1. Vapor composition
Because of the rapid response of N2 and Mn at 800-1000 ℃, and the increase of nitrogen in the whole refrigeration process, increasing the refrigeration rate is beneficial to nitrogen reduction. The hydrogen content in manganese nonferrous metals can be reduced by controlling the H2O composition (adsorbed water and crystal water) of the waste material, reducing the volatilization of coke, and reducing the contact between aluminum alloy and hydrogen in the furnace. In addition, it can prevent the aluminum alloy from contacting with the wet and cold gas in the whole process of crushing, transportation and storage, so as to avoid the hydrogen absorption reaction of aluminum alloy.
2. Wear resistant steel with carbon, sulfur and oxygen content
The feasible ways to reduce the carbon content in Mn Si Fe alloy are: calm and reduce carbon content; improve the silicon content of Mn Si Al alloy; generate slag to refine and reduce carbon content.
The sulfur content in manganese nonferrous metals can be reduced by washing and refining aluminum alloy slag according to the alkaline slag.
According to remelting and refining, metal oxides in manganese nonferrous metals can be mixed up to the surface of aluminum alloy and absorbed by top slag. In addition, the basic principle and processing technology of deamination in steelmaking process can be imitated to carry out aluminum deamination and silicon deamination for manganese nonferrous metals to reduce oxygen content.
Laser cutting crack: the laser cutting crack of wear-resistant plate is similar to the hydrogen crack caused by electric welding. If the crack is caused by cutting the edge of thick steel plate, it may appear within two days to several weeks after cutting thin. Therefore, the laser cutting crack belongs to delay time crack. The thicker and stronger the wear plate is, the larger the laser cutting crack appears.
Heating laser cutting: the reasonable way to prevent laser cutting crack of wear-resistant plate is to carry out heating before laser cutting. Before NC flame cutting, thick steel plate generally needs to be heated. The key to its heating temperature lies in the quality grade and thickness of thick steel plate. The heating method can be carried out by flame burning gun, electronic device heating pad, or heat treatment furnace. In order to determine the actual heating effect of wear-resistant plate, the required temperature should be detected at the heating point.