CN102417664A

CN102417664A - Forming agent for hard alloy production

Info

Publication number: CN102417664A
Application number: CN201110371055XA
Authority: CN
Inventors: 张�杰; 文博; 王力民; 彭英健; 周新华; 肖建光
Original assignee: ZHUZHOU CHANGJIANG CARBIDE TOOLS CO Ltd
Current assignee: ZHUZHOU CHANGJIANG CARBIDE TOOLS CO Ltd
Priority date: 2011-11-21
Filing date: 2011-11-21
Publication date: 2012-04-18

Abstract

The invention discloses a forming agent for hard alloy production. The forming agent for hard alloy production comprises: by mass, 10 to 20% of polyisobutylene, 0 to 10% of paraffin and 70 to 85% of dissolved gasoline 120#. The forming agent for hard alloy production can be prepared easily, has good formability, good fluidity and low carbon residual amount, is non-hygroscopic, has good powder fluidity, allows low compacting pressure, realizes a high compacting qualification rate and stable and controllable product piece weight and sizes, can be utilized for a re-doping process carried out after a spray drying process or a mixture drying process, is suitable for large-scale production, and has low quality control difficulty. The forming agent for hard alloy production can be prepared from the components, or the components of the forming agent for hard alloy production can be directly mixed with hard alloy powder and the mixture is utilized for follow-up production.

Description

A kind of forming agent for producing cemented carbide

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

The wimet compression molding must be used forming agent, and the forming agent that uses at present mainly contains three kinds, i.e. paraffin, PEG (polyoxyethylene glycol) and rubber-like (cis-1,4-polybutadiene rubber, styrene-butadiene rubber(SBR), SBS etc.).The wax moulding agent can be used for spraying drying and glue is mixed in manual work, carbon residue is low, but do not dissolve each other with alcohol, processability is poor, be inappropriate for produce complex-shaped product, compact strength low, the corner appears falling easily; The PEG forming agent is easy to use, safety and environmental protection, be applicable to spraying drying, dissolve each other with alcohol, carbon residue is low, but processability poor, be inappropriate for and produce complex-shaped product, moisture absorption easily; Rubber-like forming agent good moldability is mixed glue, bad dispersibility, is added irregular, mobile poor, the shape of product of glue and dimensional precision is low, carbon residue is high, carbon amount control difficulty is big, be prone to aging, easy dirtyization, big to equipment contaminate but only be suitable for manual work.

Therefore, the scientific worker has also carried out a large amount of research aspect forming agent for producing cemented carbide." exploitation of the new forming agent of SBS and applied research " (" wimet ", the third phase in 1999, Xiong Jianfei) in to the development the good rubber-like forming agent SBS (styrene-butadiene-styrene) of processability done elaboration." be used to produce the forming agent of wimet " and (ZL00113640.2) disclose a kind of rubber-like forming agent, by styrene-butadiene-styrene, gather second and defend diene, cis-1,4-polybutadiene rubber, terpine resin and industrial naptha and mix and form." a kind of forming agent for producing cemented carbide " (ZL200510032599.8) disclosed rubber-like forming agent is made up of terminal hydroxy polybutadiene liquid rubber, staybelite, tween, THF homopolymer, raw spirit and No. 120 industrial napthas mixing." a kind of forming agent for producing cemented carbide " (ZL03124561.7) also discloses a kind of rubber-like forming agent, is made up of styrene-isoprene-phenylethene polymer, terpine resin, Witcizer 300, ETHYLE ACETATE and industrial naptha." hard metal complex plasticizer and working method thereof and method of use thereof " (200710035542.2) then disclose and have a kind ofly mixed the forming agent of forming by 20～27% paraffin, 34～42% SBS solution, 32～44% solvent oil; But because paraffin very easily solidifies; This forming agent must on-the-spotly be prepared, and the time that insulation is deposited is also very short." a kind of forming agent for producing cemented carbide " (200810143025.1) disclosed modified version forming agent of forming by 40～55% polyoxyethylene stearic acid ester, 10～15% adjacent stupid dioctyl phthalate dioctyl ester, 50～30% staybelite; But the staybelite in this forming agent dissolves difficulty in alcohol, the preparation trouble.

In sum, in the existing forming agent, the rubber-like forming agent is mobile poor, and the quality control difficulty is big; PEG and wax moulding agent insufficient formability; There is problems such as using inconvenience again in several kinds of modified version forming agents.

Summary of the invention

To above problem, the present invention provides a kind of new forming agent, flowability and good moldability, preparation, easy to use.

The forming agent of CEMENTED CARBIDE PRODUCTION of the present invention by mass percent be 10%～20% polyisobutene, 0%～10% paraffin, 70%～85% 120 ^#Dissolving gasoline mixes to be formed.

The mass percent of said polyisobutene is 16.5%, 120 ^#Dissolving gasoline is 83.5%, is applicable to the production of all wimet.

For further being suitable for the production of fine particle or complex-shaped difficult moulding wimet, the mass percent of polyisobutene is 20%, 120 ^#Dissolving gasoline is 80%.

Be further to be suitable for to occur the production that pressed compact falls corner series hard alloy product easily, the mass percent of polyisobutene is 16.5%, paraffin is 10%, 120 ^#Dissolving gasoline is 73.5%.

With above-mentioned forming agent component according to the above ratio; Join in ball mill or the cemented carbide powder; Ball milling or mix; And can make formability and the mobile compound that has both through operations such as dryings, again through operations such as compression moulding, sintering, can obtain superior in quality hart metal product.

This forming agent formability and flowability are all fine, and residual carbon is low, and is non-hygroscopic; Powder flowbility is good, and pressing pressure is low, and the compacting qualification rate is high; Product substance dimensional stabilizing is controlled; Can be used for the technology of mixing again after drying process with atomizing or the compound drying, be suitable for producing in enormous quantities, the quality control difficulty is low.

Embodiment

Embodiment 1: with mass percent be 16.5% polyisobutene, 83.5% 120 ^#Dissolving gasoline is together put into whisking appliance, mixes; Treat that polyisobutene is dissolved in gasoline; And form uniform solution, and promptly obtain forming agent of the present invention, confirm the forming agent quantity that adds by the needs of the trade mark of preparing; This forming agent is added in compound or the wet wheeling machine, make hart metal product (the process step following examples after the forming agent preparation are identical) through operations such as drying, compacting, sintering.This prescription forming agent is applicable to the production of all wimet.

Embodiment 2: with mass percent be 20% polyisobutene, 80% 120 ^#Dissolving gasoline is together put into whisking appliance, mixes, and treats that polyisobutene is dissolved in gasoline, and forms uniform solution, promptly obtains forming agent of the present invention.This prescription forming agent is applicable to the production of fine particle or complex-shaped difficult moulding wimet.

Embodiment 3: with mass percent be 16.5% polyisobutene, 10% paraffin, 73.5% 120 ^#Dissolving gasoline is together put into whisking appliance, mixes, and treats that polyisobutene is dissolved in gasoline, and forms uniform solution, promptly obtains forming agent of the present invention.This prescription is applicable to and occurs the production that pressed compact falls corner series hard alloy product easily.

With W-Co-Ti carbide alloy YT15 trade mark compound is example, uses forming agent of the present invention, SBS, PEG and paraffin as forming agent respectively, compacting PS21 sample bar and A118A blade.Through many batches of samplings, measured loose density, flowability, pressing pressure, retarded elasticity, pressed compact substance deviation and the pressed compact size deviation of compound respectively; The residual carbon of blade is measured, and data results sees the following form:

Can find out that by data in the table adopt forming agent of the present invention, the loose density of carbide alloy mixture is big, good fluidity, pressed compact substance, size fluctuation are little, the pressed compact pressing pressure is little, behind the sintering in the YT15 wimet residual carbon amount low, pressed compact is difficult for oxygenation.It is low that the present invention and rubber-like forming agent are compared the residual carbon amount, and loose density is big, good fluidity, and pressed compact substance, size fluctuation are little; Compare non-hygroscopicly with PEG, environmental requirement is low, and pressing pressure is little, and carbon residue is low; Compare with paraffin, pressing pressure is low.

This forming agent not only can be prepared earlier to add after the completion again and carry out subsequent production in the cemented carbide powder, also can be directly drops into wet wheeling machine with the form of each component of forming agent and carries out subsequent production with cemented carbide powder.

Claims

1. forming agent for producing cemented carbide, it is characterized in that by mass percent be 10%～20% polyisobutene, 0%～10% paraffin, 70%～85% 120 ^#Dissolving gasoline mixes to be formed.

2. forming agent for producing cemented carbide as claimed in claim 1 is characterized in that: the mass percent of said polyisobutene is 16.5%, 120 ^#Dissolving gasoline is 83.5%.

3. forming agent for producing cemented carbide as claimed in claim 1 is characterized in that: the mass percent of said polyisobutene is 20%, 120 ^#Dissolving gasoline is 80%.

4. forming agent for producing cemented carbide as claimed in claim 1 is characterized in that: the mass percent of said polyisobutene is 16.5%, paraffin is 10%, 120 ^#Dissolving gasoline is 73.5%.