CN101372557B - Forming agent for producing cemented carbide - Google Patents
Forming agent for producing cemented carbide Download PDFInfo
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- CN101372557B CN101372557B CN2008101430251A CN200810143025A CN101372557B CN 101372557 B CN101372557 B CN 101372557B CN 2008101430251 A CN2008101430251 A CN 2008101430251A CN 200810143025 A CN200810143025 A CN 200810143025A CN 101372557 B CN101372557 B CN 101372557B
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- cemented carbide
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Abstract
The invention discloses a moulding agent used in hard alloy production, which is made from 40%-55% of stearic acid polyoxyethylene ester by weight, 10%-15% of dioctyl phthalate by weight, and 30%-50% of hydrogenated rosin by weight. The moulding agent is totally miscible with alcohol, and can be put in a ball mill in a solid state and ball-milled with the raw materials. The moulding agent has the advantages of low pulp viscosity, being applicable to spray drying process, low carbon residue, simple and convenient application method, being safe and environment-friendly, low compaction pressure, good moulding property, thus the moulding agent can be used for pressing products with complicated shapes.
Description
Technical field
The present invention relates to a kind of forming agent that powder metallurgy is produced that is used for, especially be applicable to the forming agent of CEMENTED CARBIDE PRODUCTION.
Background technology
In the CEMENTED CARBIDE PRODUCTION process, become the product of different shape for making powder compression, must to improve the processability of compound, strengthen the intensity of goods to wherein adding a certain amount of forming agent.The forming agent that adopts mainly contains polyethylene glycols (PEG) at present; Paraffin class; And rubber-like: cis-1,4-polybutadiene rubber, buna, terminal hydroxy polybutadiene liquid rubber, vinylbenzene-divinyl-vinylbenzene (SBS), vinylbenzene-isoprene-vinylbenzene (SIS) segmented copolymer.The advantage of PEG is environmental protection easy to use, safe, and mixes with alcohol, can drop into ball mill with the raw material ball milling by solid form, and slip viscosity is low, is fit to modern hard alloy production process---drying process with atomizing, and residual carbon is low; Shortcoming is that pressing pressure is big, and processability is undesirable, and the easy crackle of product can not be suppressed the product of complicated shape.The paraffin class advantage is seldom residual; Shortcoming is to use inconvenience, does not mix with alcohol, and being not suitable for alcohol is the CEMENTED CARBIDE PRODUCTION of wet grinding media, and processability is undesirable, and compact strength is low.The advantage of rubber-like forming agent is that processability is good, can suppress the product of complicated shape; Shortcoming is to use inconvenience, does not mix with alcohol, can not mix glue by ball milling, can only mix glue by hand behind the ball milling, and slip viscosity is big, is not suitable for drying process with atomizing, and the residual carbon height, and is wayward.
In sum, in existing forming agent, lack and a kind ofly can be dissolved in alcohol, the forming agent that sprayable drying, processability are good again.
Summary of the invention
The objective of the invention is to overcome the technological deficiency that forming agents such as above-mentioned PEG, paraffin and SBS exist, a kind of new forming agent for producing cemented carbide is provided.Its feature is to combine the advantage of PEG and rubber-like forming agent, can be fully and alcohol mix, can drop into ball mill with the raw material ball milling by solid form, and slip viscosity is low, be fit to drying process with atomizing, residual carbon is low, and pressing pressure is low, processability is good, can suppress the product of complicated shape.
For achieving the above object, forming agent of the present invention is 40%～55% polyoxyethylene stearic acid ester by mass percent, 10%～15% dioctyl phthalate (DOP), and 50%～30% staybelite is formed.
With above-mentioned forming agent by a certain percentage, join in the ball milling bucket, mix with cemented carbide powder powder stock and alcohol wet grinding media ball milling, forming agent and alcohol mix, and reach molecular level with powder and are uniformly dispersed; The spray-dried then alcohol of removing obtains the not only thin but also soft carbide alloy mixture that contains the mentioned component forming agent; Repressed again moulding, sintering obtain hart metal product.
Adopt the advantage of forming agent of the present invention to be, the fluctuation of carbide alloy mixture loose density is little, good fluidity, pressing pressure is low, and the loss of pressed compact fragility is few, the intensity height, be difficult for hierarchical crack, the pressed compact size deviation is little, product that can the moulding complicated shape, and the residual carbon amount is low, and the use technology effect is better than the forming agents such as PEG, paraffin and SBS that oneself has technology on the whole.And using method is easy, safety and environmental protection.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1: with mass percent is that 40% polyoxyethylene stearic acid ester, mass percent are that 10% dioctyl phthalate (DOP), mass percent are the forming agent that 50% staybelite is formed, directly drop into ball milling mixing in the ball milling bucket in the required forming agent ratio of preparation purpose trade mark carbide alloy mixture with cemented carbide powder powder stock and alcohol, compound behind the mixing is spray-dried, compression moulding, sintering, obtains hart metal product (the processing step following examples behind the ball milling mixing are identical).This prescription forming agent can be used for all kinds of CEMENTED CARBIDE PRODUCTION.
Embodiment 2: with mass percent is that 45% polyoxyethylene stearic acid ester, mass percent are that 10% dioctyl phthalate (DOP), mass percent are the forming agent that 45% staybelite is formed, and directly drops into ball milling mixing in the ball milling bucket with cemented carbide powder powder stock and alcohol in the required forming agent ratio of preparation purpose trade mark carbide alloy mixture.This prescription forming agent can be used for all kinds of CEMENTED CARBIDE PRODUCTION.
Embodiment 3: with mass percent is that 50% polyoxyethylene stearic acid ester, mass percent are that 15% dioctyl phthalate (DOP), mass percent are the forming agent that 35% staybelite is formed, and directly drops into ball milling mixing in the ball milling bucket with cemented carbide powder powder stock and alcohol in the required forming agent ratio of preparation purpose trade mark carbide alloy mixture.This prescription forming agent can be used for all kinds of CEMENTED CARBIDE PRODUCTION.
Embodiment 4: with mass percent is that 55% polyoxyethylene stearic acid ester, mass percent are that 15% dioctyl phthalate (DOP), mass percent are the forming agent that 30% staybelite is formed, and directly drops into ball milling mixing in the ball milling bucket with cemented carbide powder powder stock and alcohol in the required forming agent ratio of preparation purpose trade mark carbide alloy mixture.This prescription forming agent can be used for all kinds of CEMENTED CARBIDE PRODUCTION.
Prepare the carbide alloy mixture of the YG8 trade mark and oneself has technology forming agent PEG with the described forming agent of embodiment 1-4, paraffin and SBS prepare the carbide alloy mixture of the YG8 trade mark respectively, compacting PS21 press strip (20mm * 6.5mm * 5.25mm), ball tooth (Ф 12.5mm) and square hole wortle (40-16-50) compare, through many batches of samplings, tested the loose density of compound separately, mobile, the pressing pressure of PS21 bar, the fragility loss, ball tooth layering substance, and the moulding situation of complicated shape wortle, measured the residual carbon of wortle, correlation data the results are shown in following table:
Claims (5)
1. forming agent for producing cemented carbide is that 40%～55% polyoxyethylene stearic acid ester, 10%～15% dioctyl phthalate (DOP), 50%～30% staybelite are formed by mass percent.
2. forming agent for producing cemented carbide as claimed in claim 1 is characterized in that: the mass percent of polyoxyethylene stearic acid ester is 40%, the mass percent of dioctyl phthalate (DOP) is 10%, the mass percent of staybelite is 50%.
3. forming agent for producing cemented carbide as claimed in claim 1 is characterized in that: the mass percent of polyoxyethylene stearic acid ester is 45%, the mass percent of dioctyl phthalate (DOP) is 10%, the mass percent of staybelite is 45%.
4. forming agent for producing cemented carbide as claimed in claim 1 is characterized in that: the mass percent of polyoxyethylene stearic acid ester is 50%, the mass percent of dioctyl phthalate (DOP) is 15%, the mass percent of staybelite is 35%.
5. forming agent for producing cemented carbide as claimed in claim 1 is characterized in that: the mass percent of polyoxyethylene stearic acid ester is 55%, the mass percent of dioctyl phthalate (DOP) is 15%, the mass percent of staybelite is 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101430251A CN101372557B (en) | 2008-09-28 | 2008-09-28 | Forming agent for producing cemented carbide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101430251A CN101372557B (en) | 2008-09-28 | 2008-09-28 | Forming agent for producing cemented carbide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101372557A CN101372557A (en) | 2009-02-25 |
| CN101372557B true CN101372557B (en) | 2011-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101430251A Active CN101372557B (en) | 2008-09-28 | 2008-09-28 | Forming agent for producing cemented carbide |
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| CN (1) | CN101372557B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719690B (en) * | 2011-03-30 | 2014-07-02 | 厦门钨业股份有限公司 | High-viscosity extrusion forming agent |
| CN102925726B (en) * | 2012-10-31 | 2015-01-28 | 株洲欣荣硬质合金有限公司 | Hard alloy forming agent and perpetration method thereof |
| CN109014178B (en) * | 2018-08-31 | 2020-08-04 | 晋城鸿刃科技有限公司 | Hard alloy extrusion forming preparation method |
| CN109822089B (en) * | 2019-01-18 | 2022-05-13 | 株洲金佰利硬质合金有限公司 | Forming agent for hard alloy production |
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2008
- 2008-09-28 CN CN2008101430251A patent/CN101372557B/en active Active
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| Publication number | Publication date |
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| CN101372557A (en) | 2009-02-25 |
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