Ludox precision casting technology of pipe valve

Abstract

The invention discloses a ludox precision casting technology of a pipe valve. The ludox precision casting technology comprises the following steps: (1) designing a corresponding die according to the shape of the pipe valve; (2) filling wax in the die designed in the step (1) to obtain a wax die with the same shape as the pipe valve; (3) applying refractory material to the wax die for five times, wherein for the first time, pasting zircon sand on the surface of the wax die, for the second time, pasting mullite sand on the surface of the wax die, for the third time, pasting mullite sand on the surface of the wax die, for the fourth time, pasting mullite sand on the surface of the wax die, and for the fifth time, smearing pyrophillite slurry on the surface of the wax die; (4) sintering a moulding shell at 1000-1100 DEG C, and smelting the moulding shell at 1200-1400 DEG C to dewax; (5) filling molten metal in the sintered moulding shell, and preparing a pipe valve casting after solidification; and (6), matting and polishing the inner and outer surfaces of the pipe valve casting.

Description

technical field [0001] The invention relates to a silica sol precision casting process for pipe and valve parts, and belongs to the technical field of forging processing. Background technique [0002] Pipe valve parts refer to some parts, joints and valves connected to instruments or valves on the pipeline. The working environment of such parts is heavy load and high pressure, so the performance requirements for parts are very high. The parts are generally made of aluminum alloy, but the existing forging process has poor fluidity during forging, and it is difficult to control the temperature during forging. It may encounter problems such as decarburization, cracking and folding, and it is a difficult workpiece to forge. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a silica sol precision casting process for pipe and valve parts. By adopting the silica sol investment casting process, the product can be formed at...

AI Technical Summary

Problems solved by technology

The parts are generally made of aluminum alloy, but the existing forging process has poor fluidity during forging, and it is difficult to control the temperature during forging, and may encounter problems such as decarburization, cracking and folding. It is a difficult workpiece to forge.