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Manufacturing method of dual continuous phase metal/ceramic composite pick for mine roadheader

A double continuous phase, ceramic composite technology, applied in ceramic products, applications, household appliances, etc., can solve the problems of welding stress concentration and the difficulty of both toughness and wear resistance of roadheader pick heads, so as to improve wear resistance , Improve the interface binding performance and improve the efficiency of use

Active Publication Date: 2019-02-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem of welding stress concentration between the pick head and the pick shank of the prior roadheader pick, and the problem that the pick head of the roadheader is difficult to take into account toughness and wear resistance at the same time, the present invention proposes a mine excavation Dual continuous phase metal / ceramic composite pick for machine and manufacturing method

Method used

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  • Manufacturing method of dual continuous phase metal/ceramic composite pick for mine roadheader
  • Manufacturing method of dual continuous phase metal/ceramic composite pick for mine roadheader
  • Manufacturing method of dual continuous phase metal/ceramic composite pick for mine roadheader

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specific Embodiment approach 1

[0031] A method for manufacturing a dual-continuous-phase metal / ceramic composite pick for a mine roadheader, comprising the following steps:

[0032] Step 1. Preparation of a ceramic skeleton with a three-dimensional continuous network opening structure:

[0033] Step 1.1, uniformly mix micron and / or submicron ceramic powder, sintering aid, acrylamide monomer and surfactant in water medium to form a ceramic mixed slurry; for the production of picks, micron and / or submicron ceramic powder, sintering aids, only when the particle size is controlled in micron and / or submicron, the strength and hardness of the produced pick can meet the actual work requirements, and the sintering strength will be insufficient if the particle size is too large or too small Or the problem of not being able to sinter. Moreover, the proportion of the ceramic mixed slurry can be adjusted so that the skeleton material has the characteristics of adjustable strength, and at the same time, the strength ...

specific Embodiment approach 2

[0041] The ceramic powder in step 1.1 of this embodiment includes one or more of boron carbide, silicon carbide, titanium boride, aluminum oxide, and the like. Using boron carbide, silicon carbide, titanium boride and other ceramic powders to make a ceramic skeleton with a three-dimensional continuous network opening structure has the advantages of high hardness and wear resistance of ceramic materials. At the same time, the proportion of ceramic mixed slurry can be adjusted so that the skeleton material has the characteristics of adjustable strength, and the strength of the final pick can be further improved through process adjustment. Moreover, the use of wear-resistant diamond and other coatings on the pick head is avoided, and the manufacturing cost is reduced, thereby reducing the actual production cost.

[0042] Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0043] The sintering aid described in step 1.1 of this embodiment includes two or more of rare earth oxides, aluminum oxide, and silicon oxide. The sintering aid can be determined according to the selected ceramic powder, so as to realize the overall three-dimensional continuous network open-pore structure of the ceramic skeleton with sufficient strength and hardness. This selection process can be determined experimentally. In this way, it is possible to adjust the material selection components and process conditions according to the actual working conditions to produce picks that meet the actual working conditions.

[0044] The other steps and parameters are the same as those in the specific embodiment 1 to 2.

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Abstract

The invention discloses a manufacturing method for bicontinuous-phase metal / ceramic composite cutting teeth for a mine heading machine, relates to the field of mining device manufacturing, in particular to the manufacturing method for the cutting teeth for the mine heading machine. By means of the manufacturing method, the welding stress concentrated problem exists between cutting tooth heads and cutting tooth handles of cutting teeth of an existing heading machine, and the problems that the cutting tooth heads of the heading machine are not difficult to consider the tenacity and the abrasive resistance at the same time are solved. The manufacturing method includes the steps that ceramic powder, a sintering additive, an acrylamide monomer and a surfactant are mixed in an aqueous medium to be even, a bonding agent water is added, then foaming treatment is carried out, sintering is carried out, and the ceramic framework material which is of a three-dimensional continuous network opening structure is obtained; a waterborne medium or an ethyl alcohol medium is used as a solvent, the ceramic framework of the three-dimensional continuous network opening structure is subjected to surface treatment through a surface modifier, and spinning treatment is carried out through an organic bonding anent; coatings or coating materials are applied to the bicontinuous-phase metal / ceramic composite cutting teeth. Designing and manufacturing of the cutting teeth are achieved.

Description

technical field [0001] The invention relates to the field of mining equipment manufacturing, in particular to a method for manufacturing a pick used in a mine roadheader. Background technique [0002] In the prior art, the excavation pick of the roadheader is the key component of the large-scale excavator at present. With the continuous growth of demand in coal mines, quarries, underground railways, mountain tunnels, etc., the application of large-scale roadheaders is becoming more and more extensive. Therefore, the development of new high-performance mining picks has become an important research topic to be solved urgently. The common mining pick adopts the combined structure design of the pick shank and the pick head, and the pick head is welded to one end of the pick shank. The wear resistance of the currently used pick shank is poor, and the pick head is damaged earlier than the pick head, which leads to the fracture failure of the entire pick. The problems caused by th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B41/85C04B41/88
CPCC04B38/02C04B41/009C04B41/5057C04B41/51C04B41/85C04B41/88C04B41/4523
Inventor 张云龙张宇民周嵬张瑞霞李成海
Owner HARBIN INST OF TECH
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