A preparation method of a crushing hammer and the crushing hammer

Abstract

The invention discloses a manufacturing method of a breaking hammerhead and the breaking hammerhead. The manufacturing method of the breaking hammerhead comprises the following steps that a, hydroxy iron powder, titanium carbide powder and graphite powder are mixed, compression molding is conducted after absolute ethyl alcohol is added to serve as a molding agent, and a long strip-shaped panel blank is made, wherein the mass of the titanium carbide powder accounts for 20%-40% of the total mass of the raw materials; b, the obtained long strip-shaped panel blank is sintered in a vacuum furnace, so that a titanium carbide steel-bonded hard alloy panel is obtained; c, molten carbon steel obtained after smelting is poured into the hammerhead by using green sand for hammerhead molding, and the titanium carbide steel-bonded hard alloy panel obtained in the prior step is inlaid in the end of the hammerhead in a cast mode; d, falling sand and a casting head are removed; and e, the hammerhead is quenched in a muffle furnace and then taken out, and water quenching is conducted on the hammerhead. The internal tenacity of the hammerhead is good, and the external hardness of the hammerhead is high; and the hammerhead is not prone to brittle fracture in use, base metal and the panel are bonded precisely, the bonding strength is improved, the surface hardness of the hammerhead is improved, and accordingly the abrasion resistance of the hammerhead is improved.

Description

technical field [0001] The invention relates to the field of crushers, in particular to a method for preparing a crushing hammer and the crushing hammer. Background technique [0002] The crushing hammer head is the core component of the crusher, mainly used for crushing mineral raw materials. The crushing hammer head rotates at high speed in the crusher. During the repeated collision, impact and friction process with the mineral raw materials, the head of the crushing hammer head is gradually worn and deformed. Because the service life of the crushing hammer directly affects the crushing quality, production efficiency and cost of the material, it is necessary to frequently replace the new hammer to meet the needs of production. Therefore, the crusher industry has been in urgent need of crushing with a long service life. Hammer products, and the breaking hammer manufacturing industry has been constantly striving to manufacture high-life hammers. [0003] Breaking hammers us...

AI Technical Summary

Problems solved by technology

The method of lost foam casting adopted in this invention has the following disadvantages: wrinkled skin (carbon deposition) on the surface of iron castings, carbon increase of steel castings, reverse spraying, air holes, out-of-tolerance size, deformation, collapse of boxes, mold collapse, sand sticking, knots, etc. Tumors, acupuncture, cold shut (to the fire), not poured (foot), slag holes, sand holes, shrinkage cavities, depressions and textures, internal inclusions, shrinkage porosity, uneven tissue, etc.; and the lost foam will produce smoke The air problem has not been fully resolved, and it is easy to cause pollution to the environment

The invention adds PVA in the preparation process, and PVA is easy to decompose and generate gas at high temperature, and the generated gas will form holes inside the cemented carbide, affecting the compactness of the structure and reducing the mechanical properties of the steel-bonded cemented carbide