What should I do if "water ripples" appear on the 304 stainless steel rod?

The main reasons for the "water ripple" defect are that the oxide scale of the 304 stainless steel rod is not cleaned, the high-pressure water nozzle is poorly aligned, the roller strength is low, and the pre-straightening pressure is too high. The solution looks like this:


1. Stainless steel round bar blank heating temperature

By reducing the temperature of the steel coming out of the heat treatment furnace from 1190°C to 1160°C, this method reduces the probability of the "water ripple" defect in the steel rod, and the serious level of the water ripple defect is reduced to a certain extent.


2. Improvement of phosphorus removal processing technology

In order to better compensate for the "water ripples" of 304 stainless steel rods caused by poor overlap of high-pressure water nozzles, pre-machine descaling is used to descale the thick steel plates that are hot-pressed and cold-rolled in front of the machine, reducing the strip-shaped "water ripples". Ripple" impact. The descaling system has been improved and the descaling system behind the generator set has been upgraded.


3. Use high toughness rollers

Using high-chromium cast iron rolls, the surface strength of the rolls is about 75hl, which is 10hl higher than the strength of high-nickel cast iron rolls. After using the roller, observe the condition of the roller. The surface of the roll is smooth and clean, the surface of the 2cr13 stainless steel rod is covered with a thin oxidation film, and the surface of the cold-rolled steel plate is smooth and clean, which greatly reduces the corrosion rate of the "water ripple" defect.


4. Control pre-straightening pressure

2cr13 stainless steel rods are made through measures such as reducing the temperature of the steel plate, changing the roll material, increasing the strength of the roll, improving the high-pressure water descaling method and structure, and reducing the pre-straightening pressure, which can reduce the occurrence of "water ripple" defects in the steel plate. Improve the surface quality of stainless steel rods.