Plating first and then drawing process: 

In order to improve the performance of galvanized steel wire, the process of steel wire being lead-fired, galvanized and then drawn to the finished product is called plating first and then drawing process. The typical process flow is: steel wire-lead quenching-galvanizing-drawing-finished steel wire. The process of plating first and then drawing is the shortest process among galvanized steel wire drawing methods, and can be used for hot-dip galvanizing or electro-galvanizing and then drawing. Drawing after hot-dip galvanizing has better mechanical properties than drawing first and then coating the steel wire. Drawing after electro-galvanizing makes the zinc layer dense and resistant. Both can obtain a thin and uniform zinc layer, reduce zinc consumption and reduce the load on the galvanizing line.

The process of drawing after medium plating: 

The process of drawing after medium plating is: steel wire-lead quenching-primary drawing-galvanizing-secondary drawing-finished steel wire. The characteristic of medium plating and then drawing is that the lead-quenched steel wire is drawn once, galvanized and then drawn twice to the finished product. The galvanizing is between the two drawings, so it is called ‘intermediate plating’. The zinc layer of steel wire produced by medium plating and then drawing is thicker than that of first plating and then drawing. Hot-dip galvanizing can give a high overall compression ratio (from lead quenching to finished product), which is better than steel wire that is plated first and then drawn.

Hybrid plating and drawing process:

In order to produce ultra-high strength (3000 N/mm²) galvanized steel wire, the "hybrid plating and drawing" process is used. The typical process flow is as follows: lead quenching - primary drawing - pre-galvanizing - secondary drawing - final galvanizing - third drawing (dry drawing) - water tank drawing of a finished steel wire. The above process can produce ultra-high-strength galvanized steel wire with a carbon content of 0.93 to 0.97%, a diameter of 0.26 mm, and a strength of 3921 N/mm2. The zinc layer during drawing protects and lubricates the surface of the steel wire, and no wire breakage occurs during drawing.