CN104674097A - TiC series steel bonded hard alloy - Google Patents
TiC series steel bonded hard alloy Download PDFInfo
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- CN104674097A CN104674097A CN201510114729.6A CN201510114729A CN104674097A CN 104674097 A CN104674097 A CN 104674097A CN 201510114729 A CN201510114729 A CN 201510114729A CN 104674097 A CN104674097 A CN 104674097A
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Abstract
The invention relates to a TiC series steel bonded hard alloy. The TiC series steel bonded hard alloy is prepared from the following components in percentage by weight: 48.0-60.0% of TiC, 2.0-5.0% of TiCN, 6.0-7.5% of Mn, 0.8-1.5% of Mo, 2.5-4.0% of Ni, 0.3-0.8% of rare earth, and the balance of Fe, wherein the weight ratio of TiCN to TiC is 1: (12-24). According to the TiC series steel bonded hard alloy, the bending strength can be up to 1890-2250 MPa, the rigidity can be up to 85-91 HRA, and the density can be up to 5.95-6.15 g/cm<3>; the TiC series steel bonded hard alloy is good in abrasive resistance, low in deformation, and high in dimensional precision. In addition, the production difficulty of TiCN is low; the alloy is high in large-scale production capacity, and can be widely applied.
Description
Technical field
The invention belongs to field of powder metallurgy, be specifically related to a kind of TiC system Steel Bond Hard Alloy.
Background technology
Steel Bond Hard Alloy is as a kind of new engineering material, and its excellent properties between tool steel and Wimet and can processing and good heat treatment characteristic, makes it more and more receive the concern of material supplier author in manufacturing application.In recent years, Steel Bond Hard Alloy is gradually to powder steel and Wimet both end extension, all well applied in precision die, wear part and mine instrument, fragmentation, desalinate and ordinary rigid alloy and and rapid steel, boundary between tool steel, market share amount is also increasing.W, Co are as rare elements simultaneously, face more and more severeer scarcity of resources, and the main hard phase of TiC system Steel Bond Hard Alloy be TiC, primary bond mutually for Fe, have very large resources advantage, this is also one of TiC system Steel Bond Hard Alloy reason of being more and more used widely.
In TiC system Steel Bond Hard Alloy production process, uneven the growing up of titanium carbide is difficult to avoid, affect the hardness of alloy, intensity, dimensional precision, it is made to be difficult to use in larger field, as the pricker sheet in mine instrument, engineering machinery, pick, ball tooth, stud, shovel snowflake etc., these are all based on WC/Co Wimet.201110170310.4) and patent " a kind of TiC system Steel Bond Hard Alloy " (application number: 201310657224.5) obtained alloy all has higher hardness and wear resistance as patent " TiC system Steel Bond Hard Alloy and preparation method thereof the " (patent No.:, hardness can reach more than HRA88.0, and dimensional precision is good; But its hard phase is single TiC, the uneven phenomenon of growing up of the even TiC of the alloy after sintering crystal grain exists.
Patent " a kind of nano TiN modified TiC base Steel Bond Hard Alloy " (application number: 201210186562) disclose nano TiN modified TiC base Steel Bond Hard Alloy, nano TiN reaches the effect suppressing TiC grain growth, but the production difficulty of nano level TiN is very big.
The boride based cemented carbide composition of patent 201410401792.3 is: TiC 39.5% ~ 45.5%, TiCN 9% ~ 15%, WC 4.5% ~ 10.5%, MoC 2% ~ 5%, Ni 33% ~ 39%.It is replaced part TiC with TiCN by the content of controls TiCN, is effectively improved the microstructure mechanism of Wimet, uniform texture, can crystal grain thinning, suppresses crystal grain sharply to be grown up when sintering.But encounter many difficulties TiCN simply being directly applied to TiC system Steel Bond Hard Alloy (TiC-Mn-Mo-Ni-Fe) of the present invention, make it can not play as the effect in 201410401792.3.
Summary of the invention
The present invention aims to provide a kind of TiNC and strengthens TiC system Steel Bond Hard Alloy, improves the hardness of alloy product, intensity and homogeneity.
Disclosed as background technology, (system in, except TiC, contain Mn, Mo, Ni directly TiCN being applied to TiC system Steel Bond Hard Alloy, all the other are Fe) time, regardless of the TiCN content added, uniform texture, alloy that crystal grain is thinner all can not be obtained.
Find after deliberation, after only adding rare earth, and the weight ratio of TiCN/TiC controls in 1:12 ~ 24, and TiCN just can play and suppress the uneven effect of growing up of TiC crystal grain, obtains the alloy structure comparatively even, crystal grain is thinner.
Further, determining element contained by TiC system of the present invention Steel Bond Hard Alloy (containing Mn, Mo, Ni, rare earth except TiC, all the other are Fe) and TiCN/TiC weight ratio basis on, find when TiCN add-on is less than 1.5%, TiCN comparatively in a small amount can not play and suppress the uneven effect of growing up of TiC crystal grain; And when add-on is greater than 6.2%, the result as Fig. 2 can be produced, Fig. 2 is that in experiment, TiCN add-on is that 12%, TiCN dosage is more, produces decompose at high temperature, makes product occur the defects such as more cementite, graphite inclusion.Only have add-on in 2 ~ 5% scopes, just have a good net effect, as shown in Figure 1, crystal grain is evenly distributed and thinner.
On the basis of above-mentioned research, technical scheme of the present invention is:
Technical scheme of the present invention is: a kind of TiC system Steel Bond Hard Alloy, comprises the following component of weight percent meter: TiC 48.0 ~ 60.0wt%, TiCN 2.0 ~ 5.0wt%, Mn 6.0 ~ 7.5wt%, Mo 0.8 ~ 1.5wt%, Ni 2.5 ~ 4.0wt%, rare earth 0.3 ~ 0.8wt%; Fe is surplus; Wherein the weight ratio of TiCN and TiC is 1:(12 ~ 24).
Preferred ingredient proportioning is: Mn 6.4 ~ 7.4wt%, Mo 0.9 ~ 1.5wt%, Ni 2.6 ~ 3.5wt%, rare earth 0.3 ~ 0.6wt%.Preferred TiCN accounts for 3 ~ 4%.The weight ratio of preferred TiCN and TiC is 1:(14 ~ 17).
Preferred TiC 52.0 ~ 56.0wt%, Mn 6.75 ~ 7.0wt%, Mo 1.0 ~ 1.2wt%, Ni 3.0 ~ 3.2wt%, rare earth 0.4 ~ 0.5wt% further.
During preferred formulations, Mn is derived from ferromanganese powder, and it accounts for 8.0 ~ 9.2wt% of raw material gross weight.
Above-mentioned TiC system Steel Bond Hard Alloy preparation method, comprises batching, ball milling, granulation, compression moulding, finally at 1350 ~ 1450 DEG C of sintering.
Mechanism of the present invention is as follows: because TiCN is in particle shape, wettabilitys etc. all performance are similar with TiC, but TiCN and TiC be two kinds of materials its at crystalline structure, lattices etc. are distinguishing, TiCN is as grain inhibitor in the present invention, add-on is dosage when being 2.0 ~ 5.0%, inhibit TiC sharply the growing up and unevenly to grow up of crystal grain when high temperature sintering well, alloy is enable to obtain uniformly, the alloy structure that crystal grain is thinner, thus put forward heavy alloyed fracture toughness property, effectively improve the hardness of alloy product, intensity and homogeneity, the over-all properties of alloy is effectively improved, do not produce cementite again simultaneously, the other defects such as graphite inclusion.
Alloy bending strength of the present invention can reach 1890 ~ 2250MPa, and hardness can reach 85 ~ 91HRA, and density can reach 5.95 ~ 6.15g/cm
3, wear resistance is good, it is little to be out of shape, dimensional precision is high.In addition, the production difficulty of TiCN is little, has very strong large-scale production ability, can widespread use.
Accompanying drawing explanation
The electromicroscopic photograph of Fig. 1 embodiment of the present invention 4 (TiCN add-on is 5%).
Fig. 2 and embodiment 4 contrast, and TiCN add-on is the electromicroscopic photograph of 12% (content of TiC, Mn, Mo, Ni, rare earth is identical with embodiment 4).
As can be seen from Fig. 1 and Fig. 2, the alloy grain that the present invention obtains is evenly distributed, and there is not carburizing and graphite inclusion defect.
Embodiment
Embodiment 1
By weight percent (i.e. wt%, following examples are all identical) be 48% TiC, 2%TiCN, the ferromanganese powder of 9.2wt%, the Ni of 3.5wt%, the Mo of 1.5wt%, several powder such as the rare earth of 0.3wt% and the iron of surplus are prepared burden on request, take hard alloy bar as grinding element, ratio of grinding media to material is 6:1, take alcohol as medium wet-milling discharging after 32 hours, then spray-drying process is carried out, then compression moulding, finally carry out one sintering, with zirconium white boat for contact material, sintered heat insulating furnace cooling after 1 hour at 1400 DEG C, obtain surfacing, indeformable TiC system Steel Bond Hard Alloy.Its composition and weight percent are: Ti 39.5%, Mn 7.4%, Ni 3.5%, Mo 1.5%, N 0.6%, and rare earth 0.3%, C 9.75%, surplus is iron.
Embodiment 2
By weight percent (i.e. wt%, following examples are all identical) be 52% TiC, 3%TiCN, the ferromanganese powder of 8.75wt%, the Ni of 3.2wt%, the Mo of 1.2wt%, several powder such as the rare earth of 0.4wt% and the iron of surplus are prepared burden on request, take hard alloy bar as grinding element, ratio of grinding media to material is 6:1, take alcohol as medium wet-milling discharging after 32 hours, then spray-drying process is carried out, then compression moulding, finally carry out one sintering, with zirconium white boat for contact material, sintered heat insulating furnace cooling after 1 hour at 1400 DEG C, obtain surfacing, indeformable TiC system Steel Bond Hard Alloy.Its composition and weight percent are: Ti 44.5%, Mn 7.0%, Ni 3.2%, Mo 1.2%, N 0.9%, and rare earth 0.4%, C 10.5%, surplus is iron.
Embodiment 3
By weight percent (i.e. wt%, following examples are all identical) be 56% TiC, 4%TiCN, the ferromanganese powder of 8.5wt%, the Ni of 3.0wt%, the Mo of 1.0wt%, several powder such as the rare earth of 0.5wt% and the iron of surplus are prepared burden on request, take hard alloy bar as grinding element, ratio of grinding media to material is 6:1, take alcohol as medium wet-milling discharging after 32 hours, then spray-drying process is carried out, then compression moulding, finally carry out one sintering, with zirconium white boat for contact material, sintered heat insulating furnace cooling after 1 hour at 1420 DEG C, obtain surfacing, indeformable TiC system Steel Bond Hard Alloy.Its composition and weight percent are: Ti 47.8%, Mn 6.75%, Ni 3.0%, Mo1.0%, N 1.2%, rare earth 0.5%, C 11.4%, and surplus is iron.
Embodiment 4
By weight percent (i.e. wt%, following examples are all identical) be 60% TiC, 5%TiCN, the ferromanganese powder of 8.0wt%, the Ni of 2.6wt%, the Mo of 0.9wt%, several powder such as the rare earth of 0.6wt% and the iron of surplus are prepared burden on request, take hard alloy bar as grinding element, ratio of grinding media to material is 6:1, take alcohol as medium wet-milling discharging after 32 hours, then spray-drying process is carried out, then compression moulding, finally carry out one sintering, with zirconium white boat for contact material, sintered heat insulating furnace cooling after 1 hour at 1420 DEG C, obtain surfacing, indeformable TiC system Steel Bond Hard Alloy.Its composition and weight percent are: Ti 51.5%, Mn 6.4%, Ni 2.6%, Mo0.9%, N 1.5%, rare earth 0.6%, C 12.0%, and surplus is iron.Electromicroscopic photograph is as Fig. 1.
Steel Bond Hard Alloy performance prepared by the invention process example 1-5 in table 1, and with do not add the alloy (content of TiC, Mn, Mo, Ni, rare earth is identical with each embodiment respectively) of TiCN as a comparison.
Table 1
Claims (7)
1. a TiC system Steel Bond Hard Alloy, is characterized in that the following component comprising weight percent meter:
TiC 48.0 ~ 60.0wt%, TiCN 2.0 ~ 5.0wt%, Mn 6.0 ~ 7.5wt%, Mo 0.8 ~ 1.5wt%, Ni 2.5 ~ 4.0wt%, rare earth 0.3 ~ 0.8wt%; Fe is surplus; Wherein the weight ratio of TiCN and TiC is 1:(12 ~ 24).
2. TiC system Steel Bond Hard Alloy according to claims 1, is characterized in that component proportion is: Mn 6.4 ~ 7.4wt%, Mo 0.9 ~ 1.5wt%, Ni 2.6 ~ 3.5wt%, rare earth 0.3 ~ 0.6wt%.
3. TiC system Steel Bond Hard Alloy according to claims 2, is characterized in that: TiCN accounts for 3 ~ 4%.
4. TiC system Steel Bond Hard Alloy according to claims 2 or 3, is characterized in that: the weight ratio of TiCN and TiC is 1:(14 ~ 17).
5. TiC system Steel Bond Hard Alloy according to claims 4, is characterized in that component proportion is: TiC 52.0 ~ 56.0wt%, Mn 6.75 ~ 7.0wt%, Mo 1.0 ~ 1.2wt%, Ni 3.0 ~ 3.2wt%, rare earth 0.4 ~ 0.5wt%.
6. TiC system Steel Bond Hard Alloy according to claims 1, it is characterized in that: during batching, Mn is derived from ferromanganese powder, it accounts for 8.0 ~ 9.2wt% of raw material gross weight.
7. one of claim 1 ~ 6 described TiC system Steel Bond Hard Alloy preparation method, comprises batching, ball milling, granulation, compression moulding, finally at 1350 ~ 1450 DEG C of sintering.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110144512A (en) * | 2019-05-15 | 2019-08-20 | 株洲精工硬质合金有限公司 | Non-magnetic iron-base cemented carbide material and preparation method thereof, application |
| CN112742876A (en) * | 2020-12-24 | 2021-05-04 | 深圳市宏通新材料有限公司 | Hard alloy roller and manufacturing method thereof |
| CN114367650A (en) * | 2021-12-23 | 2022-04-19 | 中钢集团邢台机械轧辊有限公司 | Preparation method of high-speed steel working roll for rolling single-rack thin strip |
| CN115961199A (en) * | 2022-10-26 | 2023-04-14 | 四川轻化工大学 | High-strength, high-toughness and high-wear-resistance titanium-based high-manganese steel bonded ceramic alloy and preparation method thereof |
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| JPH0959739A (en) * | 1995-08-25 | 1997-03-04 | Fuji Dies Kk | Can-top tightening tool made of cermet, excellent in corrosion resistance |
| CN102839315A (en) * | 2012-06-08 | 2012-12-26 | 郑州鼎盛工程技术有限公司 | Nano TiN modified TiC-based steel bond hard alloy |
| 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 |
| CN104131206A (en) * | 2014-08-14 | 2014-11-05 | 成都西顿硬质合金有限公司 | Titanium carbonitride-based hard alloy high-speed wire guide wheel material and preparation method thereof |
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2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0959739A (en) * | 1995-08-25 | 1997-03-04 | Fuji Dies Kk | Can-top tightening tool made of cermet, excellent in corrosion resistance |
| CN102839315A (en) * | 2012-06-08 | 2012-12-26 | 郑州鼎盛工程技术有限公司 | Nano TiN modified TiC-based steel bond hard alloy |
| 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 |
| CN104131206A (en) * | 2014-08-14 | 2014-11-05 | 成都西顿硬质合金有限公司 | Titanium carbonitride-based hard alloy high-speed wire guide wheel material and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110144512A (en) * | 2019-05-15 | 2019-08-20 | 株洲精工硬质合金有限公司 | Non-magnetic iron-base cemented carbide material and preparation method thereof, application |
| CN112742876A (en) * | 2020-12-24 | 2021-05-04 | 深圳市宏通新材料有限公司 | Hard alloy roller and manufacturing method thereof |
| CN112742876B (en) * | 2020-12-24 | 2022-10-11 | 深圳市宏通新材料有限公司 | Hard alloy roller and manufacturing method thereof |
| CN114367650A (en) * | 2021-12-23 | 2022-04-19 | 中钢集团邢台机械轧辊有限公司 | Preparation method of high-speed steel working roll for rolling single-rack thin strip |
| CN114367650B (en) * | 2021-12-23 | 2024-04-05 | 中钢集团邢台机械轧辊有限公司 | Preparation method of high-speed steel working roll for single-frame thin strip rolling |
| CN115961199A (en) * | 2022-10-26 | 2023-04-14 | 四川轻化工大学 | High-strength, high-toughness and high-wear-resistance titanium-based high-manganese steel bonded ceramic alloy and preparation method thereof |
| CN115961199B (en) * | 2022-10-26 | 2024-05-17 | 四川轻化工大学 | High-strength high-wear-resistance titanium-based high-manganese steel-bonded ceramic alloy and preparation method thereof |
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