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Preparation method for TiC high-boron low alloy high-speed steel-based steel bonded cemented alloy

A steel-bonded hard alloy and low-alloy technology, which is applied in the field of preparation of TiC high-boron low-alloy high-speed steel-based 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 small size, low price and uniform distribution

Active Publication Date: 2016-03-23
JIANGSU HUICHENG MACHINERY MFG
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  • Abstract
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  • Claims
  • Application Information

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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing TiC high-boron low-alloy high-speed steel-based steel-bonded hard alloy, which adopts the following technical scheme:

[0028] (1) The raw materials used are titanium powder, ferrovanadium powder, ferrochrome powder, ferromolybdenum powder, ferrosilicon powder, ferromanganese powder, ferroboron powder, iron powder, nickel powder, copper powder, colloidal graphite, CeO 2 , PVA, the powder particle size is below 10-50μm;

[0029] (2) Material preparation:

[0030] 1) Preparation of in-situ synthesized TiC mixed powder: Titanium (Ti) and graphite powder were prepared with an atomic molar ratio of C / Ti of 0.8 to prepare in-situ synthesized TiC mixed powder;

[0031] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C0.3%, Cr5.0%, W2.5%, Mo1.8%, V1.7%, Nb0.4% , Si0.5%, Mn0.5%, B1.6%, Cu0.5%, Ni0.9%, S≤0.02, P≤0.02, CeO 2 0.8%, balance Fe, and unavoidable impurity elements;

[0032] 3...

Embodiment 2

[0039] A method for preparing TiC high-boron low-alloy high-speed steel-based steel-bonded hard alloy, which adopts the following technical scheme:

[0040] (1) The raw materials used are titanium powder, ferrovanadium powder, ferrochrome powder, ferromolybdenum powder, ferrosilicon powder, ferromanganese powder, ferroboron powder, iron powder, nickel powder, copper powder, colloidal graphite, CeO 2 , Y 3 o 2 Two kinds, PVA, the powder particle size is below 10-50μm;

[0041] (2) Material preparation:

[0042] 1) Preparation of in-situ synthesized TiC mixed powder: prepare titanium (Ti) and vanadium iron powder according to the ratio of titanium: vanadium 1:1, and then prepare the raw material with graphite powder according to the atomic molar ratio of C / Ti of 0.8 Synthesize TiC mixed powder;

[0043] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C0.4%, Cr6.0%, W2.8%, Mo2.5%, V2.0%, Nb0.5% , Si0.6%, Mn0...

Embodiment 3

[0051] A method for preparing TiC high-boron low-alloy high-speed steel-based steel-bonded hard alloy, which adopts the following technical scheme:

[0052] (1) The raw materials used are titanium powder, ferrovanadium powder, ferrochrome powder, ferromolybdenum powder, ferrosilicon powder, ferromanganese powder, ferroboron powder, iron powder, nickel powder, copper powder, colloidal graphite, CeO 2 , Y 3 o 2 , La 2 o 3 , PVA, the powder particle size is below 10-50μm;

[0053] (2) Material preparation:

[0054] 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;

[0055] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C0.5%, Cr7.0%, W3.0%, Mo3.0%, V2.5%, Nb1.0% , Si1.0%, Mn0.7%, B2.1%, Cu0.8%, Ni2.0%, S≤0.02, P≤0.02, CeO 2 0.3%, Y 3 o 2 0.3%, La 2 o 3 0.2%, bal...

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Abstract

The invention discloses a preparation method for TiC high-boron low alloy high-speed steel-based steel bonded cemented alloy. Titanium and graphite powder are mixed with the mole ratio of atoms of C / Ti as 0.7-1.1 to form in-situ synthetic TiC mixed powder; vanadium iron powder, chromium iron powder, FeMo powder, boron iron powder, ferrosilicon powder, ferromanganese powder, iron powder, nickel powder, copper powder, aquadag and rare earth materials are mixed according to the needed proportion of the mass ratio of the bonding phase metal chemical components; and steel balls are put into for ball grinding, absolute ethyl alcohol serving as a medium and polyvinyl acetate are added, and slurry is dried after ball milling and then compressed to be molded and sintered to be the steel bonded cemented alloy. The in-situ reaction synthesis technology and the liquid phase sintering technology are combined, and the TiC high-boron low alloy high-speed steel-based steel bonded cemented alloy is prepared. The TiC is synthesized in an in-situ mode inside the base body through reaction in the sintering process, the size of reinforced particles is fine, and the base body interfaces are bonded better and clean. The preparation process is simple and convenient to implement, and the comprehensive mechanical performance of the alloy is improved.

Description

technical field [0001] The invention relates to a preparation method of a TiC high-boron low-alloy high-speed steel-based steel-bonded hard alloy, in particular to a preparation method for preparing a TiC high-boron low-alloy high-speed steel-based steel-bonded hard alloy by a reaction sintering method. technical background [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...

Claims

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Application Information

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IPC IPC(8): C22C33/02C22C32/00
Inventor 邵慧萍丁刚丁家伟印杰施孟达朱坚王洪仁
Owner JIANGSU HUICHENG MACHINERY MFG
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