Packaging steel strip production vacuum melting charge and melting

Packaging steel strip production vacuum melting charge with vacuum melting profile should be used when the high purity metal as a burden, also can use quality quite waste, but waste surface should be clean after cleaning and degreasing. Alloying elements, on the basis of its physical and chemical properties and dissolving properties can choose pure metal or alloy form used in the middle. And copper active close and stable chemical performance of metal and copper together with people, active but volatile small elements add people late in refining. Volatile elements, to reduce the evaporation loss and guarantee the chemical composition, to the chamber of a stove or furnace zhongtong inert gas, set up a bit higher than the partial pressure of the volatile element of pressure, in the last stage of the melting alloy elements in order to reduce loss. After being melt furnace charge all, to be stirred or ups and downs furnace, uniform composition. Vacuum induction furnace charging, special need to pay attention to avoid in the process of melting furnace charge & other; Bridge & throughout; Panasonic tight phenomenon, charging should be. High melting point and it is not easy oxidation of elements should be in a part of the crucible, high temperature, easy oxidation of elements should increase people after the metal liquid full DNA, volatile elements in the melting chamber filled with inert gases, furnace and keep pressure conditions to join, in the form of intermediate alloy is better. Closed melting chamber after loading start pumping air into vacuum state, has met the requirement of the vacuum evacuation electrochemical materials. Sending power should be according to the gas of the furnace charge, to determine the oxygen content. Transmission power and the molten deflated rate, extraction rate, sharply to avoid a large number of gas separation, resulting in welding pool boiling, splash. When all melting metal, molten pool surface without air bubbles escape, melting into refining period). Refining period the main task is to improve the purity of liquid metal, in order to further alloy, especially lively element alloying create conditions. Refining process includes metal deoxidation, degassing and removing volatile harmful trace elements such as response. At the same time, adjust the temperature of the molten pool and alloying. In order to shorten the melting time, can pour has molten melt under atmospheric pressure in the vacuum furnace crucible, then close the vacuum chamber, vacuum, electricity refining. Refining alloying operation can be carried out when the end, people should avoid splash when metal, finished with high power mix 1 - 2, to speed up the process of melting alloy and evenly distributed.