Manufacturing method of powder sherardizing-aluminum multi-element alloy anticorrosive coating of stay cable threaded anchorage device

Abstract

The invention relates to a manufacturing method of a powder sherardizing-aluminum multi-element alloy anticorrosive coating for a threaded anchorage device of a stay cable, and belongs to the related technical field of anchorage devices. The method comprises the following steps: 1, performing heat treatment; 2, finish machining and flaw detection are conducted on the anchor device subjected to heat treatment; step 4, preparing a hot-dip galvanizing aluminum alloy material, and uniformly mixing the hot-dip galvanizing aluminum alloy material at normal temperature to form a permeating agent; 5, the anchorage device is loaded into the infiltration tank, and the infiltration tank is filled with the infiltration agent; 6, the rotary heating furnace is filled with quartz sand, the infiltration tank is buried in the quartz sand, the infiltration tank is arranged in the center of the rotary heating furnace, and the furnace is covered and sealed; seventhly, the co-permeation temperature is set, and the anchorage device is subjected to heating co-permeation treatment; 8, cooling treatment; and 9, sealing treatment is conducted on the surface of the anchorage device subjected to hot infiltration. The zinc-aluminum multi-element alloy infiltrated layer is formed on the surface of the anchorage device, the thickness of the infiltrated layer is uniform, the surface layer is free of burrs, and the method is particularly suitable for corrosion prevention of the stay cable threaded anchorage device with the tolerance fit requirement.

Description

technical field [0001] The invention relates to a method for manufacturing a powder zinc-aluminum multi-element alloy anti-corrosion coating for a cable-stayed threaded anchor, and belongs to the related technical field of anchors. Background technique [0002] Stayed cable anchorage is the core component connecting stay cables, towers and beams. Stay cable anchors include anchor cups, anchor rings, etc. The anchor cup generally adopts the inner cavity as a cone, the outer surface adopts a cylinder with external threads, and the anchor ring adopts a ring with internal threads on the inner surface. The anchor ring and the anchor cup are connected by thread, and the thread connection can realize the adjustment of the length and force of the stay cable and the replacement of the stay cable. [0003] Because the outer surface of the anchor cup is threaded, the traditional stay cable anchor is anti-corrosion by electro-galvanizing. Electrogalvanizing is an electrochemical reac...

AI Technical Summary

Problems solved by technology

However, due to the thicker coating thickness and poor uniformity of the hot-dip galvanized anchorage, it is necessary to leave a sufficient matching gap in advance, thereby reducing the threaded connection strength of the mating parts

In addition, the threaded part of the anchor needs to be processed after dipping, which reduces the thickness and uniformity of the hot-dip coating, and cannot guarantee the effective anti-corrosion of the threaded part of the anchor.