A kind of preparation method of aluminum-doped hard alloy
A cemented carbide and aluminum-doped technology, applied in the field of cemented carbide materials, can solve the problems of poor corrosion resistance and plasticity, and achieve the effect of improving toughness and wear resistance and shortening sintering time.
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[0031] A kind of preparation method of aluminum-doped cemented carbide provided by the present invention, this method realizes by following steps:
[0032] Step 1. Proportioning according to the following components by weight percentage: molybdenum powder 4~6%, nickel powder 5~7%, conventional tungsten carbide powder 45~60%, inhibitor 0.6~1.0%, cobalt powder doped with aluminum 7~9%, the rest is cast tungsten carbide powder; step 2, first mix conventional tungsten carbide powder and cast tungsten carbide powder for ball milling until the particle size is 0.3~0.8um, and obtain mixed tungsten carbide powder after ball milling, and set aside; Inhibitor and aluminum (Al)-doped cobalt powder are mixed and ball milled to a particle size of 0.2~0.6um, and the ball-milled aluminum (Al)-doped cobalt powder is obtained for use; cast tungsten carbide and conventional tungsten carbide have different The co-sintering of the three strengthens the strength of the binder phase and improves th...
Embodiment 1
[0050] Step 1. Proportion according to the following components by weight percentage: 4% molybdenum powder, 5% nickel powder, 45% conventional tungsten carbide powder, 0.6% inhibitor, 7% cobalt powder doped with aluminum, and the rest is cast tungsten carbide pink;
[0051] Step 2. First, mix conventional tungsten carbide powder and cast tungsten carbide powder for ball milling to a particle size of 0.3um, and obtain mixed tungsten carbide powder after ball milling for use; mix the inhibitor and cobalt powder doped with aluminum (Al) for Ball milling to a particle size of 0.2um to obtain cobalt powder doped with aluminum (Al) after ball milling, and set aside;
[0052] Step 3, mixing the ball-milled mixed tungsten carbide powder and the ball-milled aluminum-doped cobalt powder into a ball mill for wet milling to obtain the first mixed slurry;
[0053] Step 4. After mixing the remaining components, add them to a ball mill for wet grinding until the particle size is 1um to obta...
Embodiment 2
[0068] Step 1. Proportion according to the following components by weight: 5% molybdenum powder, 6% nickel powder, 50% conventional tungsten carbide powder, 0.8% inhibitor, 8% cobalt powder doped with aluminum, and the rest is cast tungsten carbide pink;
[0069] Step 2: first ball mill conventional tungsten carbide powder and cast tungsten carbide powder to a particle size of 0.5um, and obtain mixed tungsten carbide powder after ball milling for later use; mix the inhibitor and Al-doped cobalt powder for ball milling to particle size Be 0.4um, obtain the cobalt powder doped with aluminum (Al) after ball milling, for subsequent use;
[0070] Step 3, mixing the ball-milled mixed tungsten carbide powder and the ball-milled aluminum (Al)-doped cobalt powder and adding them to the ball mill for wet grinding to obtain the first mixed slurry;
[0071] Step 4: After mixing the remaining components, add them to a ball mill for wet grinding until the particle size is 1.5um to obtain t...
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