Self-protecting medicine cored wire material for large-scale hot-forging die sandwich layer and preparation method thereof

Abstract

The invention discloses a self-protecting medicine cored wire material for a large-scale hot-forging die sandwich layer and a preparation method thereof. The medicine cored wire material is prepared from the following chemical components of the medicine core in percentage by mass: 0.24 to 0.4 percent of carbon contents, 0.2 to 0.6 percent of silicon contents, 0.8 to 1.2 percent of managanese elements, less than or equal to 0.02 percent of phosphorus contents, less than or equal to 0.02 percent of sulfur content, 1.8 to 2.5 percent of chromium elements, 1.8 to 2.5 percent of nickel elements, 1.2 to 1.6 percent of molybdenum contents, 13 to 18 percent of vanadium contents, and the balance of iron and impurities. The invention provides the self-protecting medicine cored wire material for the large-scale hot-forging die sandwich layer, so that under a high-temperature reloading extreme operating condition of the sandwich layer material, the elastic deformation and the stress diffusion ability of the sandwich layer are improved, the bonding strength of the sandwich layer and a steel casting mould base body as well as a transitional layer is increased, and the molding quality and the welding technology of the sandwich layer are better.

Description

technical field [0001] The invention belongs to the technical field of welding material manufacturing, and in particular relates to a self-protecting drug core wire used for a sandwich layer of a large hot forging die and a preparation method thereof. Background technique [0002] The 80,000-ton die forging hydraulic press (the world's largest die forging hydraulic press), a major landmark achievement in my country's machinery industry, has played an irreplaceable role in the manufacture of large key parts in aerospace, energy, ships and other fields since it was put into production in 2013 . Now the 80,000-ton die forging hydraulic press is combined with a large hot forging die (single set of 60-100 tons in weight) to form difficult-to-deform materials (such as titanium alloys, high-temperature alloys, ultra-high-strength steel, etc.). The working area of ​​the cavity is under extreme working conditions such as high temperature (350-700°C) and heavy load (over 40,000 tons o...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: to provide a self-protecting drug core wire material for the sandwich layer of a large hot forging die, which solves the extreme high temperature and heavy load of the existing sandwich layer materials. Under working conditions, the elastic deformation and stress diffusion ability of the sandwich layer is poor, the bonding strength between the sandwich layer and the cast steel matrix and the transition layer is small, and the molding quality and welding process performance of the sandwich layer are poor; at the same time, it also provides a technical problem. A preparation method of self-protecting drug core wire used for sandwich layer of large hot forging die

Images