Duplex-metal abrasion-proof bent tube and producing method thereof

Abstract

The invention provides a dual-metal wearable bent pipe and a production method thereof, and relates to the production process of a metal part, in particular to the production method used for bent pipes applied to material delivery system in the industries such as nonferrous metal, ferrous metal, steel, smelting, metallurgy, mine, power, building material, etc. Poured metal bent pipe is wrapped by a steel pipe, two ends of which are respectively welded by a flange; finally, two pipe joints are respectively welded on the internal rounds of the two flanges, thus forming the dual-metal wearable bent pipe with high hardness, good wearability and strong weldability; the dual-metal wearable bent pipe has good integration performance, long service life and little maintenance quantity, saves the raw material, obviously reduces the labor intensity and the production cost of the user, achieves the high-efficiency energy-saving and environmental-protection typed production, promotes the fast development of resource and energy industries such as nonferrous metal, ferrous metal, steel, metallurgy, mine, power and building material, etc.

Description

technical field [0001] The invention relates to a production process of metal parts, in particular to a production method of bent pipes used in material conveying systems in non-ferrous, black, iron and steel, smelting, metallurgy, mining, electric power and building materials industries. Background technique [0002] For the wear-resistant elbows (or elbows) currently used in material conveying systems in non-ferrous, black, steel, smelting, metallurgy, mining, electric power and building materials industries, according to the years of use by users in the industry and the results of expert investigations, it is shown that wear-resistant The use of elbows (elbows) has always been plagued by a problem that is difficult to solve, that is, to improve the weldability of the product, the product hardness HRC<30, but the product has poor wear resistance and short service life; Wear resistance, the product hardness HRC>35, but the product has poor weldability, easy to break, ...

AI Technical Summary

Problems solved by technology

Defects are: (1) Alloy steel and other wear-resistant elbows have poor wear resistance. Generally, the thickness of the outer arc is increased to prolong the wear time, which cannot fundamentally solve the problem of fast wear, and the welding performance is poor, and on-site butt welding is required Seam heat treatment brings considerable difficulties to on-site installation and maintenance

(2) The interlayer of the cast stone wear-resistant elbow is thick, and the wall thickness of the worn surface is 25-40 mm. Worn out, cannot be repaired on site

(3) The ceramic-lined composite wear-resistant elbow has many microscopic cracks, is brittle and brittle, and is easy to fall off and fail locally, and has poor impact resistance.

(4) The service life is short, installation, disassembly and maintenance are very inconvenient, which increases the amount of maintenance, labor intensity of workers and production cost

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