A Controlled Ingrown Metal Composite and Pick

Abstract

The invention discloses a composite material for controlling endogenous metal. The preparation method is as follows: mixing low-density hard element carbide TiC with Ce and Mo, and uniformly distributing it on the designated position of the mould; The iron-based metal liquid is kept warm for no less than 3 minutes, and then quenched after solidification to form a controlled endogenous metal composite material. The mixture is fixed in position by iron wrapping or magnetic adsorption process. Also disclosed is a pick, the working end and the shank of which are integrally formed by the method of controlling the preparation of endogenous metal composite materials, and the shank and the working end have a transition layer of 1-10 mm without an obvious interface. The invention can promote in-situ endogenous fusion of low-density hard element carbide and matrix material by selecting active elements, suitable fixing process, and suitable pouring process, so as to achieve uniform dispersion distribution of hard phase and strengthen the work of picks The wear resistance of the end reduces the cost and expands the technical application range.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment, in particular to a control endogenous metal composite material and a pick. Background technique [0002] Mining picks are one of the vulnerable parts in coal mining and tunneling machinery, and are the main tool for coal falling and crushing. Its performance directly affects the production capacity, power consumption, and stable operation of coal mining machinery. and the service life of other related components. Existing picks are made by embedding hard alloy strips with a diameter of 15-20mm in the pick tip holes of common structural steel materials. Although the hardness of the cemented carbide strip is very high, the hardness of the common structural steel material is only about 40HRC. In actual production, when the pick head is embedded in the mining layer, due to the lack of wear resistance of the base material of the head, the carbide strip embedded in the hole at the top is...

AI Technical Summary

Problems solved by technology

In actual production, when the pick head is embedded in the mining layer, it is worn due to insufficient wear resistance of the base material of the head, and the hard alloy strip embedded in the hole at the top is easy to fall off due to the wear of the base, thereby reducing the service life

And the price of the carbide rod is expensive

[0003] In order to overcome the problems existing in the existing picks, the applicant used the two-liquid composite method disclosed in the previous utility model patent (application number: 201120178148.6, patent name: bimetal composite hammer), and found that this method has disadvantages: Poor controllability of the lamination process, low yield; poor interface wetting, unstable lamination quality, easy to fatigue, fracture and fall off; complex production process, high product cost

First of all, in the preparation method step, the hard phase (Ti, W) C and the active element particles need to be fixed in the form of a prefabricated block, and cold glue is needed to realize the fixed hard phase (Ti, W) C and the active element particles in the prefabricated block. Bonding between active element particles, but the cold glue will generate a lot of gas and waste residue during the high-temperature pouring of the base material, which will affect the quality of the fusion product

Secondly, in this preparation method, in order to make the density of the hard phase particles substantially equal to the density of the matrix material molten steel, a high-density element W is required, and the preparation process of the (Ti, W)C particles is complicated and the production cost is high

That is to say, this method cannot realize in-situ dispersive metallurgical fusion between low-density hard phase particles and matrix materials, resulting in the high cost of picks prepared by this process, which is not conducive to popularization

[0006] It can be seen that the picks prepared by the existing technology all have the disadvantages of being easy to wear, easy to fall off or high in cost. The application creates a kind of material with a wide range, which can greatly reduce the cost of raw materials and processes, and has high wear resistance and is not easy to fall off. Control of Ingrown Metal Composites and Picks