Preparation method of nickel-based as-cast brazing powder
An as-cast, nickel-based technology, applied in welding equipment, manufacturing tools, welding media, etc., can solve problems such as uneven composition, high preparation costs, hard and brittle as-cast solder, and achieve simple process operation, size and defects less demanding effect
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[0030] The invention provides a method for preparing nickel-based cast brazing powder, comprising the following steps:
[0031] After the nickel-based as-cast brazing filler metal is removed, ball milling is carried out to obtain the nickel-based as-cast brazing powder;
[0032] The nickel-based as-cast solder includes B and / or Si, and W and / or Mo.
[0033] In the present invention, unless otherwise specified, all preparation materials are commercially available products well known to those skilled in the art.
[0034] In the present invention, when the nickel-based as-cast solder includes B, the mass percentage of B in the nickel-based as-cast solder is preferably 1.0-4.0%, more preferably 1.3-2.1%;
[0035] When the nickel-based as-cast solder includes Si, the mass percentage of Si in the nickel-based as-cast solder is preferably 0.5-4.0%, more preferably 3.0-3.4%;
[0036] When the nickel-based cast solder includes W, the mass percentage of W in the nickel-based cast sold...
Embodiment 1
[0046] Composition of nickel-based as-cast solder: C 0.1%, Si 3.5%, Mo 3.5%, Ti 7.5%, Al 3.2%, B1.8%, Co 9.5%, Fe 0.15%, Hf0.6%, Re 0.08% , Ta 0.09%, W4.0%, Cr 11.5% and the balance Ni, the microstructure is as figure 1Shown (there is a large amount of skeletal Si-rich eutectic phases formed by the enrichment of Si, Mo and W etc. in the nickel-based as-cast solder, i.e. enriched phase);
[0047] Adopt lathe to carry out chip removal to described nickel-based as-cast solder, described lathe spindle speed is 50r / min, feed rate is 0.01mm / r, and cutting amount is 0.5mm; Use tungsten carbide ball mill tank on planetary ball mill Carry out ball milling with ball milling beads, the ball milling medium is absolute ethanol, the ball-to-material ratio is 10:1, the speed is 400r / min, and the time is 8h; the ball-milled material is dried in an oven at 80°C for 8h, and passed through a 160-mesh screen Sieve to obtain the nickel-based cast brazing powder;
[0048] figure 2 is the backsc...
Embodiment 2
[0050] Composition of nickel-based as-cast solder: C 0.1%, Si 2.5%, Mo 3.5%, Ti 7.5%, Al 3.2%, B1.5%, Co 9.5%, Fe 0.15%, Hf0.6%, Re 0.08% , Ta 0.09%, W 4.0%, Cr 13.5% and the balance Ni, the microstructure is as image 3 Shown (there is a large amount of skeletal Si-rich eutectic phases formed by the enrichment of Si, Mo and W etc. in the nickel-based as-cast solder, i.e. enriched phase);
[0051] Adopt lathe to carry out chip removal to described nickel-based as-cast solder, described lathe spindle speed is 50r / min, feed rate is 0.01mm / r, and cutting amount is 0.5mm; Use tungsten carbide ball mill tank on planetary ball mill Carry out ball milling with ball milling beads, the ball milling medium is absolute ethanol, the ball-to-material ratio is 10:1, the speed is 400r / min, and the time is 8h; the ball-milled material is dried in an oven at 80°C for 8h, and passed through a 160-mesh screen Sieve to obtain the nickel-based cast brazing powder;
[0052] Figure 4 is the back...
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