Process for manufacturing rare earth high-carbon low-alloy steel liner

Abstract

The invention discloses a method for producing rare earth high-carbon low alloy steel scaleboard, which comprises shaping step, smelting step and thermal treating step. Wherein, the shaping step comprises wet sand shaping step and EPC disappear mould shaping step; the wet sand shaping step uses 40-100 deals of artificial quartz sand while the silicon content is not less than 98%; the back sand uses river sand; the material ration is: quartz sand in 100%, alta-mud in 7-8%, water in 4-6%; and said step also uses separate sand, pestle sand, gas hole, draw plate, and shaping tank; EPC disappear mould shaping step uses quartz sand, one-dimension vibration shaping; the smelting step uses acidic furnace liner and double slag method; the thermal treating step first heats the scaleboard to 600-650Deg. C to keep said temperature for 1-2 hours, and than heats it to 900-960Deg. C and keeps 2-3 hours, than cooling it with water to 380-420Deg. C, to be cooled into room temperature via air, at last heats it to 200-400Deg. C and keeps 3-5 hours, than cooling it via air. The ball grinder scaleboard produced by said method has high friction resistance, without plastic distortion and breakage, while it has lower cost and easy maintenance.

Description

Technical field [0001] The invention relates to a liner plate production process, in particular to a rare earth high-carbon low-alloy steel liner plate production process. Background technique [0002] In our country, the application of roller ball mill is very popular, widely used in metal mines, cement, power systems and other industries. High manganese steel is mostly used as the material of the ball mill liner, but there are many problems in the use of high manganese steel liner. The high manganese steel liner cannot fully exert the ability of work hardening under the grinding condition of the ball mill, and the wear resistance is poor. At the same time, due to the low plastic deformation resistance of high manganese steel, the surface of the liner is plastically deformed during use, causing the liner to occlude, or even deform as a whole, and the fastening bolts are broken, making maintenance and disassembly very difficult. Some manufacturers also use high-chromium cas...

AI Technical Summary

Problems solved by technology

High manganese steel is mostly used as the material of the ball mill liner, but there are many problems in the use of high manganese steel liner. The high manganese steel liner cannot fully exert the ability of work hardening under the grinding condition of the ball mill, and the wear resistance is poor. At the same time, due to the low plastic deformation resistance of high manganese steel, the surface of the liner is plastically deformed during use, which will cause the liner to bite, or even deform as a whole, and the fastening bolt will be broken, making maintenance and disassembly very difficult.

Some manufacturers also use high-chromium cast iron linings, but high-chromium cast iron linings have disadvantages such as high cost and easy breakage of the linings.