Preparation method of ultrahigh-manganese steel based TiC steel bond hard alloy

A technology of steel-bonded hard alloy and ultra-high manganese, applied in the field of preparing ultra-high manganese steel-based TiC steel-bonded hard alloy by reaction sintering method, can solve the adverse effects of material structure and performance, unsuitability for large-scale production, and preparation cost High-level problems, to achieve the effect of improving various performances, small size, and uniform distribution

Inactive Publication Date: 2014-12-10
JIANGSU HUICHENG MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing an ultra-high manganese steel-based TiC steel-bonded hard alloy, which adopts the following technical scheme:

[0030] (1) Raw materials:

[0031] 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;

[0032] (2) Material preparation:

[0033] 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;

[0034] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C1.1%, Cr2.5%, Mo1.5%, V0.7%, Si0.6%, Mn18%, Ni0 .8%, S≤0.02, P≤0.02, CeO 2 ≤0.8%, balance Fe, and unavoidable impurity elements;

[0035] 3) Preparation of ultra-high manganese steel-based ...

Embodiment 2

[0042] A method for preparing an ultra-high manganese steel-based TiC steel-bonded hard alloy, which adopts the following technical scheme:

[0043] (1) Raw materials:

[0044] 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;

[0045] (2) Material preparation:

[0046] 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;

[0047] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C1.3%, Cr2.8%, Mo1.8%, V0.8%, Si0.7%, Mn19%, Ni0 .9%, S≤0.02, P≤0.02, CeO 2 0.5%, Y 3 o 2 0.3%, balance Fe, and unavoidable impurity elements;

[0048] 3) Preparati...

Embodiment 3

[0055] A method for preparing an ultra-high manganese steel-based TiC steel-bonded hard alloy, which adopts the following technical scheme:

[0056] (1) Raw materials:

[0057] 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;

[0058] (2) Material preparation:

[0059] 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;

[0060] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C1.5%, Cr3.5%, Mo2.0%, V1.0%, Si0.8%, Mn20%, Ni1 .0%, S≤0.02, P≤0.02, CeO 2 , Y 3 o 2 , La 2 o 3 One or the combination of two or more ≤ 0.8%, the balance Fe, an...

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Abstract

The invention relates to a preparation method of ultrahigh-manganese steel based TiC steel bond hard alloy. The preparation method is characterized by comprising the following steps: preparing titanium powder and graphite powder into in-situ synthesized TiC powder with the required proportion according to the C / Ti atomic ratio of 0.8-1.0; preparing ferromolybdenum powder, ferrovanadium powder, ferrochromium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite and rare earth raw materials according to the required mass ratio of bonded-phase metal chemical components, performing ball-milling by a steel ball, adding absolute ethanol as a medium and PVA (polyvinyl alcohol), after the ball-milling process is finished, drying slurry, pressing for forming, and sintering to obtain the steel bond alloy. According to the preparation method, the ultrahigh-manganese steel based TiC steel bond hard alloy is prepared by combining an in-situ reaction synthesis technology with a liquid-phase sintering technology; as TiC is synthesized in situ in a substrate through reaction in the sintering process, the fineness of particles is improved, no sharp angle is formed on the surface, and a substrate interface is relatively good in adhesion and clean; the comprehensive mechanical property of the alloy can be improved, the price is low, and the process is simple and convenient.

Description

technical field [0001] The invention relates to a preparation method of an ultra-high manganese steel-based TiC steel-bonded hard alloy, in particular to the technical field of preparing an ultra-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 cement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/02C22C38/14C22C29/02C22C1/05
Inventor 邵慧萍丁刚丁家伟印杰施孟达
Owner JIANGSU HUICHENG MACHINERY MFG
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