Control method for adjusting phase composition of cemented carbide bonding phase

The invention discloses a control method for adjusting the phase composition of a cemented carbide bonding phase. The control method comprises the steps of placing a molded or extruded cemented carbide compact in a heater before sintering after forming, introducing a certain flow of air into the heater, keeping the temperature for a certain time under a preset temperature condition, and enabling oxygen in the air to undergo oxidation reaction with metal elements in the cemented carbide; and controlling the waiting time before sintering of the product within 24 h. Through process improvement and equipment development, waiting time before compact sintering can be reduced, and the manufacturing period can be shortened; and the magnetic saturation uniformity of the product can be improved, andthe magnetic saturation stability between batches can be improved. 本发明公开了一种调整硬质合金粘接相相成分的控制方法，是在成形后烧结前，将模压或挤压成形的硬质合金压坯，放置在加热器中，并向加热器内通入一定流量的空气，在预置的温度条件下，保温一定的时间，让空气中的氧与硬质合金中的金属元素发生氧化反应；使产品烧结前的等待时间控制在24h内。本发明通过工艺改进与设备开发，既能够减少压