CN104498801B - A kind of TiC system steel bonded carbide - Google Patents
A kind of TiC system steel bonded carbide Download PDFInfo
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- CN104498801B CN104498801B CN201410746464.7A CN201410746464A CN104498801B CN 104498801 B CN104498801 B CN 104498801B CN 201410746464 A CN201410746464 A CN 201410746464A CN 104498801 B CN104498801 B CN 104498801B
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Abstract
The present invention relates to a kind of TiC system steel bonded carbide, following elementary composition by by weight percentage: Ti 47.5～56.0 wt%, Mn 0.5～2.0wt%, Mo 2.0～3.0wt%, Cr 1.5～3.0wt%, Ni 5.0～8.0wt%, C 11.0～13.4wt%, rare earth 0.1～1.0wt%, Fe is surplus.Bending strength >=1700 MPa, HRA hardness >=88.0 of this alloy, porosity≤A04B04, can also be antirust while ensureing the high rigidity of product, high-wearing feature, corrosion resistance is good, nonmagnetic, expands TiC system steel bonded carbide and uses field.
Description
Technical field
The invention belongs to field of powder metallurgy, relate to a kind of TiC system steel bonded carbide.
Background technology
Steel bonded carbide as a kind of new engineering material, its excellent between tool steel and hard alloy
The opposite sex can and can be processed and good heat treatment characteristic, makes it in manufacturing application increasingly by material
The concern of worker.
In recent years, steel bonded carbide gradually to powder steel and hard alloy both end extension, precision die,
Wear part and mine instrument, broken the most well applied, desalinated with ordinary rigid alloy and
And the boundary between high-speed steel, tool steel, market share amount is the most increasing.W, Co are as rare simultaneously
Element, faces increasingly severeer scarcity of resources, and the main hard phase of TiC system steel bonded carbide be TiC,
Primary bond is Fe mutually, has the biggest resources advantage, and this is also that TiC system steel bonded carbide increasingly obtains
To one of wide variety of reason.
In industries such as mine instrument, engineering machinery, TiC system steel bonded carbide usage amount is the least, mainly
WC-Co hard alloy, its reason is that the hardness of TiC system steel bonded carbide is relatively low, and wearability is inadequate.Picture
Pricker sheet, pick, button, stud, shovel snowflake etc. use field require alloy hardness at more than HRA88.0,
Dimensional accuracy is high, and good welding performance, some use fields also require non-corrosive under atmospheric environment simultaneously.
Making a general survey of prior art, less TiC system steel-bonded carbide products can reach above-mentioned means suitable,
" TiC system steel bonded carbide and preparation method thereof " such as number of patent application 201110170310.4 discloses one
The preparation method of kind of TiC system Steel-bonded Cemented Carbide, its composition and percentage by weight be: hard phase TiC
(50.0～70.0) %, potassium steel Binder Phase (30.0～50.0) %, wherein Mn (4.2～7.2) %, Ni
(1.0～2.0) %, Mo (0.5～1.0) %, Cr (0.5～1.5) %, C (11～14) %, rare earth (0.05～
0.15) %, ferrum are surplus.This alloy type is similar to conventional potassium steel steel bonded carbide, have higher hardness with
Wearability, hardness can reach more than HRA88.0, and dimensional accuracy is good；But the performance of potassium steel matrix fails
Well embodied, affected the shock resistance of alloy；This alloy rare earth element addition fails less simultaneously
Improve the wettability of alloy very well.
And for example patent " a kind of TiC system steel bonded carbide " (application number: 201310657224.5) discloses one
Kind of TiC system Steel-bonded Cemented Carbide, its composition and percentage by weight be: Ti 47.5～56%, Mn 6.4～
8%, Ni 2.0～4.0%, Mo 0.6～1.0%, rare earth element 0.3～0.5%, C 11.6～13.5%, surplus
For Fe；This alloy belongs to potassium steel steel bonded carbide, has higher hardness and wear resistance, and hardness can reach
To more than HRA88.0, dimensional accuracy is good.But the shock resistance of this alloy is undesirable；This alloy simultaneously
Product is the most oxidizable to get rusty, and corrosion resistance is poor, affects welding performance simultaneously.
Summary of the invention
For the problems referred to above, it is desirable to provide a kind of TiC system steel bonded carbide, guarantee high rigidity,
While high-wearing feature, bending strength is high, corrosion-resistant good, is difficult to get rusty.
First the present invention have studied TiC system of the prior art its defect Producing reason of steel bonded carbide.
The TiC system steel bonded carbide of the number of patent application 201110170310.4 introduced in the introduction, it closes
Containing higher Mo, Cr in gold, and Mo, Cr are not to add with the form of carbide, but are closing
Gold production process incorporates formation intermetallic compound in matrix.Owing to Mo, Cr are to reduce austenitic area element,
Alloy can be made finally can not to obtain uniform austenite completely, therefore have impact on its shock resistance.
The TiC system steel knot hard that another number of patent application is 201310657224.5 introduced in the introduction
Alloy material, its alloy, owing to there being the Mn of high level, can be made because Mn fusing point is low when product sinters
Becoming the volatilization of product subsurface Mn content too much, birth local is uneven causes product, have impact on the shock resistance of alloy
Performance.
On the basis of the studies above, the concrete technical scheme of the present invention is: a kind of TiC system steel knot hard closes
Gold, following elementary composition by by weight percentage: Ti 47.5～56.0wt%, Mn 0.5～2.0wt%,
Mo 2.0～3.0wt%, Cr 1.5～3.0wt%, Ni 5.0～8.0wt%, C 11.0～13.4wt%, rare earth 0.1～
1.0wt%, Fe are surplus.
This alloy selects TiC powder, ferromanganese powder, nikel powder, molybdenum powder, ferrochrome powder, iron powder when dispensing.
Each raw material additional proportion be respectively as follows: TiC 60.0～70.0wt%, ferromanganese powder 0.6～2.5wt%, Mo 2.0～
3.0wt%, ferrochrome powder 2.5～5.0wt%, Ni 5.0～8.0wt%, rare earth 0.1～1.0wt%, Fe is surplus.
The rare earth element added is Y, Ce or La.
The preparation method of the TiC system steel bonded carbide of the present invention, comprises the following steps: by described component and
Percentage ratio dispensing, wet grinding, spray drying, compressing and sintering.
Contact material during alloy sintering selects zirconium oxide, magnesium oxide or aluminium oxide, and it can make sheet material,
Can also coating use on graphite boat.Preferably sintering temperature is 1400～1420 DEG C.
The present invention is the steel bonded carbide with titanium carbide as hard phase, with austenitic stainless steel as matrix, closes
Bending strength >=the 1700MPa of gold, HRA hardness >=88.0, porosity≤A04B04, at the height ensureing product
Can also be antirust while hardness, high-wearing feature, corrosion resistance is good, nonmagnetic, expands TiC system steel knot hard
Matter alloy uses field.
Accompanying drawing explanation
800 times of metallographs of TiC system steel bonded carbide of Fig. 1 present invention.
1500 times of metallographs of TiC system steel bonded carbide of Fig. 2 present invention.
The TiC system steel bonded carbide of Fig. 3 present invention and the antirust comparison diagram of high-manganese steel-base alloy product, right side
For the TiC system steel bonded carbide of the present invention, left side is high-manganese steel-base product.The most antirust test condition is:
Temperature 15 to 20 degrees Celsius, rainwater is placed 6 hours under conditions of drenching.
The TiC steel bonded carbide of Fig. 4 present invention and the antirust comparison diagram of high-manganese steel-base alloy product, right side is
TiC system of the present invention steel bonded carbide, left side is high-manganese steel-base product.The most antirust test condition is: temperature
Spending 15 to 20 degrees Celsius, rainwater is placed 72 hours under conditions of drenching.
Detailed description of the invention
By the TiC of constant weight percentage ratio (i.e. wt%, following example are the most identical), ferromanganese powder, Ni powder,
Several powder such as the ferrum of Mo powder, ferrochrome powder, rare earth and surplus, by table 1 requirement dispensing, with hard alloy bar are
Abrasive body, ratio of grinding media to material is 6:1, with ethanol for medium wet grinding 32 hours after discharging, be then spray-dried
Pelletize, be then pressed into type, the most integrally sinter, concrete sintering parameter is shown in Table 2, obtain surfacing,
Indeformable TiC system steel bonded carbide, the chemical composition of prepared TiC system steel bonded carbide is shown in Table 3,
Alloy property is shown in Table 4, structure such as Fig. 1,2, rust-proof effect such as Fig. 3,4.
The each embodiment of table 1 each proportioning raw materials unit: wt%
| TiC | Ferromanganese powder | Mo | Ni | Ferrochrome powder | Rare earth | Fe | |
| Embodiment 1 | 60 | 2.5 | 3.0 | 8.0 | 5.0 | 1.0 | Surplus |
| Embodiment 2 | 65 | 1.5 | 2.5 | 6.5 | 3.7 | 0.6 | Surplus |
| Embodiment 3 | 70 | 0.75 | 2.0 | 5.0 | 2.5 | 0.1 | Surplus |
Table 2 each embodiment sintering parameter
| Sintering temperature (DEG C) | Temperature retention time (h) | Contact material | |
| Embodiment 1 | 1400 | 1 | Magnesium oxide |
| Embodiment 2 | 1410 | 1 | Aluminium oxide |
| Embodiment 3 | 1420 | 1 | Zirconium oxide |
The chemical composition unit of the hard alloy that each embodiment of table 3 prepares: wt%
| Ti | Mn | Mo | Ni | Cr | C | Rare earth | Fe | |
| Embodiment 1 | 47.5 | 2.0 | 3.0 | 8.0 | 3.0 | 11.3 | 1.0 | Surplus |
| Embodiment 2 | 52.0 | 1.2 | 2.5 | 6.5 | 2.2 | 12.4 | 0.6 | Surplus |
| Embodiment 3 | 56.0 | 0.5 | 2.0 | 5.0 | 1.5 | 13.4 | 0.1 | Surplus |
The performance of the hard alloy that each embodiment of table 4 prepares
Claims (6)
1. a TiC system steel bonded carbide, it is characterised in that: following elementary composition by by weight percentage: Ti 47.5～56.0
Wt%, Mn 0.5～2.0wt%, Mo 2.0～3.0wt%, Cr 1.5～3.0wt%, Ni 5.0～8.0wt%, C 11.0～13.4wt%,
Rare earth 0.1～1.0wt%, Fe is surplus；TiC powder, ferromanganese powder, nikel powder, molybdenum powder, ferrochrome powder, iron powder is selected during dispensing；
Sintering temperature during preparation is 1400～1420 DEG C.
TiC system the most according to claim 1 steel bonded carbide, it is characterised in that: each raw material additional proportion is respectively as follows: TiC
60.0～70.0wt%, ferromanganese powder 0.6～2.5wt%, Mo 2.0～3.0wt%, ferrochrome powder 2.5～5.0wt%, Ni 5.0～8.0wt%,
Rare earth 0.1～1.0wt%, Fe is surplus.
TiC system the most according to claim 1 and 2 steel bonded carbide, it is characterised in that: the rare earth element added be Y,
Ce or La.
4. the preparation method of one of claims 1 to 3 described TiC system steel bonded carbide, it is characterised in that comprise the following steps:
By described component and percentage ratio dispensing, wet grinding, spray drying, compressing and sintering.
The preparation method of TiC system steel bonded carbide the most according to claim 4, it is characterised in that contact material during sintering is oxygen
Change zirconium, magnesium oxide or aluminium oxide.
6. according to the preparation method of TiC system steel bonded carbide described in claim 4 or 5, it is characterised in that sintering temperature is
1400～1420 DEG C.
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| CN105624511A (en) * | 2016-03-11 | 2016-06-01 | 河源泳兴硬质合金有限公司 | Tungsten-carbide titanium-based steel-bonded hard alloy and preparation method thereof |
| CN111826570B (en) * | 2020-07-23 | 2021-11-16 | 矿冶科技集团有限公司 | High-temperature-resistant and high-wear-resistant nickel-based titanium carbide powder and preparation method thereof |
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| FR2465790A1 (en) * | 1979-09-18 | 1981-03-27 | Thyssen Edelstahlwerke Ag | Wear resistant titanium carbide compacts with steel matrix - which provides low sintering temp. and prods. suitable for all types of tools and dies |
| CN102230119B (en) * | 2011-06-23 | 2012-12-26 | 株洲硬质合金集团有限公司 | TiC system steel-bonded carbide and preparation method thereof |
| CN102383022B (en) * | 2011-11-14 | 2013-03-06 | 王华彬 | Method for preparing high-TiC-content iron base metal ceramic material through combustion synthesis |
| CN102409191B (en) * | 2011-11-14 | 2013-06-19 | 王华彬 | Sintered preparation method of iron-based metal ceramic material with high TiC content |
| CN102492887A (en) * | 2011-12-26 | 2012-06-13 | 株洲硬质合金集团有限公司 | TiC steel-bonded cemented carbide and its manufacturing method |
| CN103627943A (en) * | 2013-12-09 | 2014-03-12 | 株洲硬质合金集团有限公司 | TiC series steel bond hard alloy |
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