CN1321212C - Method for mfg. W-Co-Ti hard alloy - Google Patents
Method for mfg. W-Co-Ti hard alloy Download PDFInfo
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- CN1321212C CN1321212C CNB021397449A CN02139744A CN1321212C CN 1321212 C CN1321212 C CN 1321212C CN B021397449 A CNB021397449 A CN B021397449A CN 02139744 A CN02139744 A CN 02139744A CN 1321212 C CN1321212 C CN 1321212C
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Abstract
The present invention discloses a method for preparing tungsten cobalt-cemented titanium carbide, which comprises steps that WC-TiC complex carbide, WC powder and Co powder are blended, balled, milled, dried, mixed with a shaping agent, pressed, shaped, sintered, etc., wherein the weight ratio of TiC to WC in the complex carbide is from 30:70 to 40:60. During blending, a Ti content is (4.8 to 5.3)wt%, and the WC powder of (1.2 to 1.8)mum and (6 to 8)mum is used and is matched according to the weight ratio of 80:20 to 60:40. During the blending, a Co content is controlled to (7.7 to 8.3)wt%, and (0.5 to 2.0)wt% of Ni is added. The tungsten cobalt-cemented titanium carbide prepared with the method can the problems that the abrasion of a carbide blade is over quick during use, the blade is easy to burn, etc. The content of binding metal Co is not increased, and the cost of the tungsten cobalt-cemented titanium carbide is decreased.
Description
Technical field
The present invention relates to a kind of preparation method of W-Co-Ti carbide alloy.
Background technology
It is at present general when the roughing of carbon steel or steel alloy that what adopt is the blade that the P30 series hard alloy that belongs to iso standard is made material.The preparation method of a kind of (YT 5 carbide of producing as Zhuzhou Hard Alloy Plant) that is widely used in this series hard alloy generally comprise with the composite carbide of WC-TiC and WC powder, Co powder through batching, ball milling, drying, mix steps such as forming agent, compression moulding and sintering, wherein the weight ratio of TiC and WC is 30: 70～40: 60 in the composite carbide, the content of matrix metal Co is controlled at (8.9～9.4) wt%, Ti content is (4.8～5.3) wt%, and the size range of WC powder is chosen in (6.0～8.0) μ m.The W-Co-Ti carbide alloy of producing like this has good toughness, and bending strength can reach 1900MPa, and its shortcoming is the wear resistance deficiency, and hardness (HRA) is 90.0, and the blade of making of this alloy is easy to wear in use and produce and burn the cutter phenomenon.It is (4.8～5.3) wt% that the content of Ti when batching has been adopted in patent application 02139716.3, the content of Co is controlled at (9.0～10.0) wt%, and the technical scheme of selecting for use (1.2～1.8) μ m and the WC powder of (6～8) μ m to arrange in pairs or groups by 80: 20～60: 40 weight ratio, do not reducing on the Wimet flexible basis, improve its hardness, solve alloy blade problem such as rapid wear and easy burning cutter in use.But increased the content of matrix metal Co, made the cost of W-Co-Ti carbide alloy increase to some extent.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of W-Co-Ti carbide alloy can solve alloy blade problem such as rapid wear and easy burning cutter in use, does not increase the content of matrix metal Co again, reduces the cost of W-Co-Ti carbide alloy.
In order to achieve the above object, technical scheme of the present invention comprise with the composite carbide of WC-TiC and WC powder, Co powder through batching, ball milling, drying, mix steps such as forming agent, compression moulding and sintering, the weight ratio of TiC and WC is 30: 70～40: 60 in the composite carbide, the content of Ti is (4.8～5.3) wt% when batching, and select for use (1.2～1.8) μ m and the WC powder of (6～8) μ m to arrange in pairs or groups by 80: 20～60: 40 weight ratio, the content of Co is controlled at (7.7～8.3) wt% during batching, adds the Ni of (0.5～2.0) wt%.
Because character and the Co of Ni are approaching, substitute Part of Co with a certain amount of Ni and can not reduce the performances such as bending strength of Wimet, so can solve alloy blade problem such as rapid wear and easy burning cutter in use; Because reduced the content of matrix metal Co, make the cost of W-Co-Ti carbide alloy of the present invention reduce again.
Embodiment
The preparation method's of W-Co-Ti carbide alloy of the present invention embodiment comprises that elder generation is made into compound with composite carbide, cobalt powder, nickel powder and tungsten carbide powder by certain requirement, in ball mill wet-milling discharging after 70～73 hours, redeposition 24 hours, drying and 100 order vibration screening, mix forming agent, suppress, take off forming agent and, be incubated 50 minutes processes such as sintering in (1470～1480) ℃.
Table 1 provides 5 kinds of specific embodiments of aforementioned compound chemical ingredients and relevant batching mode.Table 2 is the technical qualification of the Ni powder of adding.Table 3 provides Rockwell hardness and the bending strength value by the W-Co-Ti carbide alloy of 5 kinds of specific embodiment preparations in the table 1.
Table 1
| Numbering | Co (wt％) | Ti (wt％) | C (wt％) | Ni (wt％) | Composite carbide TiC: WC | WC powder degree (μ m) | Thin WC: thick WC (weight ratio) | |
| Fine particle | Coarse particles | |||||||
| 1 | 7.7 | 4.8 | 6.41 | 2.0 | 30∶70 | 1.8 | 8.0 | 70∶30 |
| 2 | 8.3 | 5.3 | 6.41 | 0.5 | 40∶60 | 1.5 | 6.0 | 80∶20 |
| 3 | 8.1 | 5.1 | 6.41 | 1.4 | 40∶60 | 1.2 | 7.1 | 70∶30 |
| 4 | 7.9 | 5.0 | 6.41 | 1.5 | 40∶60 | 1.5 | 6.6 | 60∶40 |
| 5 | 8.0 | 5.0 | 6.41 | 1.5 | 40∶60 | 1.8 | 6.4 | 80∶20 |
Annotate: in the table 1 in the compound content of W be surplus.
Table 2
| The content of Ni (%) | Fisher particle size (μ m) | Loose density (g/cm 3) |
| ≥99.5 | 1.5～3.0 | ≤0.75 |
Table 3
| Numbering | Hardness (HRA) | Bending strength (MPa) |
| 1 | 90.6 | 2180 |
| 2 | 91.0 | 1900 |
| 3 | 90.7 | 2050 |
| 4 | 90.6 | 1960 |
| 5 | 90.7 | 2100 |
Claims (1)
1, a kind of preparation method of W-Co-Ti carbide alloy, comprise with the composite carbide of WC-TiC and WC powder, Co powder through batching, ball milling, drying, mix forming agent, compression moulding and sintering step, the weight ratio of TiC and WC is 30: 70～40: 60 in the composite carbide, the content of Ti is 4.8～5.3wt% when batching, and select for use the WC powder of 1.2～1.8 μ m and 6～8 μ m to arrange in pairs or groups by 80: 20～60: 40 weight ratio, it is characterized in that: the content of Co is controlled at 7.7～8.3wt% when batching, adds the Ni of 0.5～2.0wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021397449A CN1321212C (en) | 2002-11-08 | 2002-11-08 | Method for mfg. W-Co-Ti hard alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021397449A CN1321212C (en) | 2002-11-08 | 2002-11-08 | Method for mfg. W-Co-Ti hard alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1420194A CN1420194A (en) | 2003-05-28 |
| CN1321212C true CN1321212C (en) | 2007-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021397449A Expired - Fee Related CN1321212C (en) | 2002-11-08 | 2002-11-08 | Method for mfg. W-Co-Ti hard alloy |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198780A (en) * | 1995-10-02 | 1998-11-11 | 陶氏化学公司 | Singal step synthesis and densification of ceramic-ceramic and ceramic-metal composite materials |
| CN1226881A (en) * | 1996-06-04 | 1999-08-25 | Omg美国公司 | Metallic carbide-group VIII metal powder and its preparation |
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2002
- 2002-11-08 CN CNB021397449A patent/CN1321212C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198780A (en) * | 1995-10-02 | 1998-11-11 | 陶氏化学公司 | Singal step synthesis and densification of ceramic-ceramic and ceramic-metal composite materials |
| CN1226881A (en) * | 1996-06-04 | 1999-08-25 | Omg美国公司 | Metallic carbide-group VIII metal powder and its preparation |
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| CN1420194A (en) | 2003-05-28 |
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