A kind of preparation method of composite tungsten-based tubular electrode hard surface material

Abstract

The invention discloses a preparation method of a compound tungsten-base tubular welding rod hard-face material. The preparation method of the compound tungsten-base tubular welding rod hard-face material is characterized in that the raw materials comprise, by weight, 50-65 parts of cemented carbide pellets, 10-12 parts of spheroidal tungsten carbide, 10-30 parts of casting granular tungsten carbide, 6-8 parts of single crystal granular tungsten carbide, 1-2 parts of silicon nitride ceramic particles, 2.5-4.5 parts of silicon-manganese powder and 0.5 part of phenolic resin; the method comprises the steps that the raw materials of the cemented carbide pellets, the spheroidal tungsten carbide, the casting granular tungsten carbide, the single crystal granular tungsten carbide, the silicon nitride ceramic particles and the silicon-manganese powder are mixed for 1-4 h in a mixing machine according to the proportions, and a mixture is obtained; after the mixture obtained in the first step is discharged, the phenolic resin is added in the mixture according to the proportion for even stirring and drying in a drying box, the mixture is maintained for 3 h at 100 DEG C, the mixture is maintained for 3 h at 150 DEG C, and the finished product tubular welding rod hard-face material is obtained after the processed product is taken out of the drying box. The preparation method of the compound tungsten-base tubular welding rod hard-face material is mainly used for preparing the compound tungsten-base tubular welding rod hard-face material.

Description

Technical field [0001] The invention relates to a method for preparing hard-faced materials for welding rods, in particular to a method for preparing hard-faced materials for composite tungsten-based tubular welding rods. Background technique [0002] Existing tungsten-based tubular electrodes use a single tungsten-based hard surface material abroad, such as cast tungsten carbide (WC) and spherical WC. Due to casting WC, spherical WC has high hardness and high brittleness, and it is wear-resistant without impact. Sex can be reflected. However, under impact conditions, such as roller cone bits in oil drilling, oil and natural gas traversing reamers, due to the great impact, casting WC, spherical WC, is the eutectic of WC and W2C, and is in the form of flakes. The structure and impact resistance are extremely poor, and the hard surface layer will soon crack, fall off, and fall off, and the drilling tools will soon be damaged. Germany DURMAT; Switzerland SUZER use a single cast WC...

AI Technical Summary

Problems solved by technology

The disadvantages of the prior art are: 1. The tubular electrode of a single hard surface material has high hardness and high brittleness, and the toughness and strength of the cutting edge cannot be guaranteed, resulting in hard surface layer fracture and edge loss, resulting in tool waste

2. The impact resistance of tubular electrodes made of cemented carbide balls and cast WC composite hard surface materials is improved, but because the hardness of cemented carbide balls is too low and the content is too much, the wear resistance is greatly affected. Cannot meet the requirements under severe wear and impact resistance conditions

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