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Preparation method of modified high-manganese steel base TiC steel bonded carbide

A technology of steel-bonded hard alloy and high manganese, which is applied in the field of preparation of modified high-manganese steel-based TiC steel-bonded hard alloy, can solve the problems of adverse effects on material structure and performance, unsuitability for large-scale production, and high preparation costs. To achieve the effect of improving various performances, small size and uniform distribution

Inactive Publication Date: 2015-01-21
JIANGSU HUICHENG MACHINERY MFG
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  • Summary
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Problems solved by technology

[0006] But the in-situ synthesis method also has many deficiencies: the reinforcing particles are limited to the thermodynamically stable particles in a specific matrix; The shape is controlled by the kinetics of the nucleation and growth process, and after the in-situ particles are formed, they often segregate in the dendrite gap or grain boundary during the casting process, which has a negative impact on the structure and properties of the material, and the processability is poor. The cost is higher than the existing technology, not suitable for large-scale production

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]A method for preparing a modified high manganese steel-based TiC steel-bonded hard alloy, which adopts the following technical scheme:

[0029] (1) Raw materials:

[0030] The raw materials used are titanium powder, ferromolybdenum powder, ferrochrome powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite, CeO 2 , PVA, the powder particle size is below 10-50μm;

[0031] (2) Material preparation:

[0032] 1) Preparation of in-situ synthesized TiC mixed powder: Titanium (Ti) powder and graphite powder were prepared at a C / Ti atomic ratio of 0.85 to prepare in-situ synthesized TiC mixed powder;

[0033] 2) Preparation of matrix alloy powder for the bonding phase: the chemical composition of the bonding phase metal material is: C1.0%, Cr2.0%, Mo1.4%, V0.8%, Si0.6%, Mn11%, Ni1 .2%, S≤0.02, P≤0.02, CeO 2 ≤0.8%, balance Fe, and unavoidable impurity elements;

[0034] 3) Preparation of modified high-manganes...

Embodiment 2

[0041] A method for preparing a modified high manganese steel-based TiC steel-bonded hard alloy, which adopts the following technical scheme:

[0042] (1) Raw materials:

[0043] The raw materials used are titanium powder, ferromolybdenum powder, ferrochrome powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite, CeO 2 , Y 3 o 2 Two kinds, PVA, the powder particle size is below 10-50μm;

[0044] (2) Material preparation:

[0045] 1) Preparation of in-situ synthesized TiC mixed powder: Titanium (Ti) powder and graphite powder were prepared with a C / Ti atomic ratio of 0.9 to prepare in-situ synthesized TiC mixed powder;

[0046] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C1.3%, Cr2.2%, Mo1.8%, V1.5%, Si0.7%, Mn12%, Ni1 .6%, S≤0.02, P≤0.02, CeO 2 0.5%, Y 3 o 2 0.3%, balance Fe, and unavoidable impurity elements;

[0047] 3) Prepara...

Embodiment 3

[0054] A method for preparing a modified high manganese steel-based TiC steel-bonded hard alloy, which adopts the following technical scheme:

[0055] (1) Raw materials:

[0056] The raw materials used are titanium powder, ferromolybdenum powder, ferrochrome powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite, CeO 2 , Y 3 o 2 , La 2 o 3 , PVA, the powder particle size is below 10-50μm;

[0057] (2) Material preparation:

[0058] 1) Preparation of in-situ synthesized TiC mixed powder: Titanium (Ti) powder and graphite powder were prepared with a C / Ti atomic ratio of 1.0 to prepare in-situ synthesized TiC mixed powder;

[0059] 2) Preparation of matrix alloy powder for the bonding phase: the chemical composition of the bonding phase metal material is: C1.0-1.5%, Cr1.8-2.5%, Mo0.6-2.0%, V0.5-2.0%, Si0 .6~0.9%, Mn10~14%, Ni0.5~2.0%, S≤0.02, P≤0.02, CeO 2 , Y 3 o 2 , La 2 o 3 One or the combination of...

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Abstract

The invention relates to a preparation method of modified high-manganese steel base TiC steel bonded carbide. The preparation method is characterized by preparing in-situ synthesized TiC powder in a required proportion from titanium powder and graphite powder according to the atomic ratio of C to Ti, namely 0.8-1.0; preparing the raw materials including ferromolybdenum powder, ferrovanadium powder, ferrochrome powder, ferromanganese powder, ferrosilicon powder, ferrum powder, nickel powder, colloidal graphite and rare earth according to a required proportion of mass ratios of chemical components of bonding phase metals, filling steel balls, performing ball milling, adding absolute ethyl alcohol used as a medium and PVA (polyvinyl alcohol) to the steel balls, drying the slurry after ball milling, and then forming the slurry by pressing and sintering the product, thus obtaining steel bonded carbide. The preparation method has the advantages that the modified high-manganese steel base TiC steel bonded carbide is prepared by combining an in-situ reactive synthesis technology and a liquid phase sintering technology; as TiC is synthesized in situ inside a matrix through reaction in the sintering process, the reinforced particles have small sizes and do not have sharp corners on the surfaces, and the matrix is better in interface bonding and has a clean interface; the preparation method of steel bonded carbide is conductive to improving the comprehensive mechanical properties of carbide, is low in price and is simple and convenient in process.

Description

technical field [0001] The invention relates to a preparation method of a modified high manganese steel-based TiC steel-bonded hard alloy, in particular to the technical field of preparing a modified high-manganese steel-based TiC steel-bonded hard alloy by a reaction sintering method. Background technique [0002] Steel-bonded cemented carbide (hereinafter referred to as steel-bonded alloy) is produced between cemented carbide and alloy tool steel, die steel and high-speed steel with steel as the matrix, tungsten carbide, titanium carbide, etc. Between high-life mold materials and engineering materials. The proportion range of steel bonded alloy steel matrix binder phase and hard phase is quite wide, which determines that it has the following excellent properties: 1) Wide range of process properties, mainly forgeability, machinability and heat treatability and solderability. 2) Good physical and mechanical properties, mainly in wear resistance equivalent to high cobalt ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C33/02C22C29/10C22C32/00C22C30/00C22C38/58
Inventor 邵慧萍丁刚丁家伟印杰施孟达
Owner JIANGSU HUICHENG MACHINERY MFG
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