The invention discloses a
vacuum sintering anti-bending method for a hard
alloy round bar material. The
vacuum sintering anti-bending method comprises the following
processing steps: a, pressing and forming by an extruding
machine; b, pressing
graphite boat loaded blank for natural
drying; c, trimming the blank; d, putting the blank in a degumming furnace along with a degumming presintering
graphite boat for degumming presintering; e,
machining the blank; f,
coating anti-sticking coatings on the surface of the cover plate V-shaped groove of a
graphite cover plate and the surface of the base plate V-shaped groove of a graphite base plate; g, naturally
drying the anti-sticking coatings; h,
sintering and loading the graphite boat loaded blank, and clamping the blank between the base plate V-shaped groove and the cover plate V-shaped groove; i, putting the blank in a
vacuum sintering furnace along with the
sintering loading graphite boat, and vacuumizing after the furnace door is closed; j, vacuum-
sintering the blank; k, cooling to
room temperature along with the furnace, so that the preparation of the
round bar material is completed. Through the design of the
processing steps, the bending rate can be effectively reduced, the phenomenon of bonding can be avoided, and the quality and the yield of the hard
alloy round material can be effectively improved.