Non-magnetic metal ceramic mould and preparation method thereof
A cermet and mold technology, applied in the field of cermet materials, can solve the problems of low performance and insufficient wear resistance of non-magnetic hard alloy molds, achieve good promotion and application prospects, improve strength, and enhance wear resistance.
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Embodiment 1
[0017] 1. Pre-solid solution treatment: Mix Ni powder, W powder, Cr powder and Mo powder, and the weight ratio of each component is: Ni-22, W-16, Cr-6, Mo-6, and prepare 6 groups of equal amounts The raw material powders were put into ball milling tanks and carried out dry milling on a planetary ball mill. According to the specific process parameters shown in Table 1, a total of 6 groups of Ni-W-Cr corresponding to A1, A2, A3, A4, A5 and A6 were obtained. - Mo pre-solid solution powder;
[0018] Table 1 Binder phase pre-solid solution process
[0019] Numbering
ball to material ratio
Ball mill speed(rpm)
Milling time (h)
A1
10∶1
350
24
A2
10∶1
300
30
A3
12∶1
300
28
A4
14∶1
300
28
A5
15∶1
350
26
A6
15∶1
250
30
[0020] 2. Raw material mixing: the obtained A1, A2, A3, A4, A5, A6 total 6 gro...
Embodiment 2
[0032] 1. Pre-solution treatment: Mix Ni powder, W powder, Cr powder and Mo powder according to the proportions corresponding to the serial numbers 1, 2, 3, 4, 5, 6, and 7 in Table 5 to obtain the corresponding 7 groups The raw material powder is put into the ball mill tank and dry-milled on the planetary ball mill. According to the specific process parameters of the number A4 in Table 1, the corresponding P1, P2, P3, P4, P5, P6 and P7 are obtained. Group Ni-W-Cr-Mo pre-solid solution powder;
[0033] Table 5 Composition of non-magnetic cermets
[0034] Preface
No
(W,Ti,Ta,Nb)(C,N)
Solid solution (wt%)
Ni (wt%)
W (wt%)
Cr(wt%)
Mo (wt%)
pre-solution
powder
1
45
23
20
3
9
P1
2
45
25
17
7
6
P2
3
50
20
16
6
8
P3
4
55 ...
Embodiment 3
[0045] 1. Pre-solid solution treatment: Mix Ni powder, W powder, Cr powder and Mo powder according to the ratio of No. 4 in Table 5, and put them into a ball mill tank for dry grinding on a planetary ball mill, according to the number in Table 1 The concrete process parameter of A3, obtains Ni-W-Cr-Mo pre-solid solution powder;
[0046] 2. Mixing of raw materials: mix the obtained Ni-W-Cr-Mo pre-solid solution powder according to the weight percentage of No. 4 in Table 5 and (W, Ti, Ta, Nb) (C, N) solid solution powder, and put it into the ball mill Carry out wet grinding on the planetary ball mill in the tank, the ball-to-material ratio is 6:1, the rotating speed is 200rpm, and the time is 40 hours to obtain the mixed raw material;
[0047] 3. Molding: add 5% molding agent to the mixed raw materials, and then mold it to obtain a compact, and the molding pressure is 250MPa;
[0048] 4. Degreasing: Degrease the green compact in a vacuum sintering furnace with a vacuum degree o...
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