Annealing furnace vacuum pumping method and annealing furnace

Abstract

The present invention relates to the technical field of titanium alloy manufacturing, in particular to a method for vacuuming an annealing furnace and an annealing furnace, wherein the method for vacuuming an annealing furnace includes: S1, heating the annealing furnace to a first preset temperature in a water bath through a water circulation system; S2, The annealing furnace is evacuated to a preset vacuum degree by a vacuum device; S3, the annealing furnace is heated to a second preset temperature by a heating device; S4, the water circulation system is turned off, and the residual in the annealing furnace is discharged water; S5, continue to heat and vacuumize the annealing furnace. The invention does not require multiple vacuuming operations, effectively improving the efficiency of the vacuuming stage, and the annealing furnace does not need to be opened and reheated, which can ensure that the air is exhausted. The vacuuming device vacuumizes the furnace after the water bath is heated, which can ensure There is no residue of internal water molecules, which can avoid accelerating the combination of titanium and oxygen, and reduce the oxidation of high-temperature sections on the surface of titanium workpieces.

Description

technical field [0001] The invention relates to the technical field of titanium alloy manufacture, in particular to an annealing furnace vacuum pumping method and an annealing furnace. Background technique [0002] Titanium and titanium alloys are active at high temperatures and are easy to combine with carbon, oxygen, nitrogen, hydrogen, etc., so the annealing process of titanium alloys requires a high degree of vacuum in the annealing environment. In process production, vacuum annealing furnace is generally used to anneal finished products of titanium and titanium alloy coils (or plates). [0003] Under normal circumstances, after each annealing cycle is completed, the titanium and titanium alloy strips (or plates) are hoisted away, and the next batch of materials is waiting for the furnace, because the output of titanium and titanium alloy strips (or plates) is relatively unsaturated , sometimes the waiting time is 1-2 days before the next batch of materials enters the f...

AI Technical Summary

Problems solved by technology

These measures can improve the efficiency of vacuuming, but there are the following problems: 1. The process of vacuuming multiple times - filling with argon - and then vacuuming requires very delicate operations. It must be ensured that the pressure in the furnace is lower than atmospheric pressure, otherwise once the overpressure , the seal of the vacuum furnace fails, and a large amount of gas enters the furnace chamber; multiple argon fillings will also increase production costs and prolong the production cycle; 2. After the furnace body is opened, heating can only remove part of the air, and there will still be a large amount of water molecules remaining

3. If the furnace body is closed and then heated and then vacuumed, it will inevitably accelerate the combination of titanium and oxygen, which will oxidize the surface of the titanium workpiece

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