TiC steel-bonded cemented carbide and its manufacturing method

A technology for steel-bonded cemented carbide and cemented carbide rods, which is applied in the field of TiC-based steel-bonded cemented carbide and its preparation, and can solve the problem of large difference in manganese content between surface and core, large difference between surface and core, and resistance to thermal stress. Problems such as poor ability to achieve high grinding efficiency, uniform internal structure, and good ball milling effect

Inactive Publication Date: 2012-06-13
ZHUZHOU HARD ALLOY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are common defects such as large porosity, large deformation, and low wear resistance. At the same time, the volatilization of manganese in the product is large, the difference in manganese content between the surface and the core is large, the austenite is uneven, the difference between the surface and the core is large, and the resistance Poor thermal stress capability

Method used

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  • TiC steel-bonded cemented carbide and its manufacturing method
  • TiC steel-bonded cemented carbide and its manufacturing method
  • TiC steel-bonded cemented carbide and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: The percentage by weight (i.e. wt%, the following examples are all the same) is 56% TiC, 44% high manganese steel according to the requirements, Ni 4.5%, Mo 2.1%, Mn 14.2%, C 1.1%, Fe balance. Using cemented carbide rods as the grinding body, the ratio of ball to material is 6:1, using alcohol as the medium, adding molding agent and raw materials together for ball milling for 28 hours, then unloading, then spray drying and granulation, then press molding, and finally sintering , to obtain the TiC steel-bonded cemented carbide of the present application, its typical metallographic diagram is shown in figure 1 , the properties are shown in Table 1.

Embodiment 2

[0010] Example 2: The weight percentage (ie wt%, the following examples are all the same) is 54% TiC and 46% high manganese steel according to the requirements, and the high manganese steel contains Ni4.2%, Mo 2.0%, Mn 14.8% , C 1.0%, Fe balance. Using cemented carbide rods as the grinding body, the ratio of ball to material is 6:1, using alcohol as the medium, adding molding agent and raw materials together for ball milling for 28 hours, then unloading, then spray drying and granulation, then press molding, and finally sintering , to obtain the TiC steel-bonded cemented carbide of the present application, its typical metallographic diagram is shown in figure 1 , the properties are shown in Table 1.

Embodiment 3

[0011] Example 3: The percentage by weight (i.e. wt%, the following examples are all the same) is 60% TiC, 40% high manganese steel according to the requirements, and the high manganese steel contains Ni 4.9%, Mo 1.9%, Mn 13.5%, C 1.2%, Fe balance. Using cemented carbide rods as the grinding body, the ratio of ball to material is 6:1, using alcohol as the medium, adding molding agent and raw materials together for ball milling for 28 hours, then unloading, then spray drying and granulation, then press molding, and finally sintering , to obtain the TiC steel-bonded cemented carbide of the present application, its typical metallographic diagram is shown in figure 1 , the properties are shown in Table 1.

[0012] Table 1 Performance comparison between the TiC-based steel-bonded cemented carbide of the present invention and a certain patent application alloy

[0013]

[0014] Depend on figure 1 , figure 2 It can be seen from the comparison that the TiC-based steel-bonded ...

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Abstract

The invention provides a TiC steel-bonded cemented carbide, which contains 54.0-60.0 wt% of a hard phase TiC and 46-40 wt% of a bonding phase high manganese steel, wherein the bonding phase contains, by weight, 4.0-6.0% of Ni, 1.5-3.0% of Mo, 13.0-15.0% of Mn, 1.0-1.3% of C and the balance being Fe. The TiC steel-bonded cemented carbide is mainly prepared by the following steps of: proportioning, ball milling, drying, compaction, sintering, and balling milling of a forming agent and the raw materials. A ball milling rod is a cemented carbide rod and the drying step is spray drying. The TiC steel-bonded cemented carbide has advantages of uniform austenite microstructure, high wear resistance, good strength and good pourability.

Description

technical field [0001] The invention relates to a TiC-based steel-bonded hard alloy and a preparation method thereof. Background technique [0002] As a new type of engineering material, steel-bonded alloy has excellent properties between tool steel and cemented carbide, as well as machinability and good heat treatment characteristics, so its application in manufacturing industry has attracted more and more attention from material workers. TiC steel-bonded alloys are mainly used in mining tools, construction machinery and other fields, and their main components are TiC, ferromanganese, Ni, Mo and iron. For example, the patent "TiC-based non-magnetic steel-bonded hard alloy material" (CN 1548568A) discloses a method for preparing a TiC-based non-magnetic steel-bonded hard alloy material. The composition and weight percentage are: hard phase TiC40.0~ 60.0, high manganese steel binder phase 60.0~40.0, of which manganese 14.0~18.0, Ni1.5~3.0, Mo1.0~3.0, C0.7~1.2, iron is the ba...

Claims

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Application Information

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IPC IPC(8): C22C29/10C22C1/05
Inventor 郑阳东李强王立明赵璇
Owner ZHUZHOU HARD ALLOY GRP CO LTD
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