A kind of steel pickling pretreatment method and product thereof
A steel and pickling technology, applied in the field of steel pickling, can solve the problems of alkali hanging on the surface of the wire rod, steel production interruption, serious corrosion of the crucible, etc., and achieve the effects of improving the working environment, saving costs and lowering the working temperature.
Active Publication Date: 2021-11-23
BEIJING SHOUGANG GITANE NEW MATERIALS
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Problems solved by technology
In this process, a large amount of alkali mist will be generated, and alkali mist has a strong stimulating effect on human skin and has a greater pollution to the environment.
This lye also corrodes the crucible quite seriously.
In addition, with the continuous production of steel, the heat of the molten alkali is gradually taken away, the temperature drops, and the phenomenon of "hanging alkali" begins to appear on the surface of the wire rod, causing the interruption of steel production
Method used
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Embodiment 1
[0097] Present embodiment 1 adopts 7 test groups, adopts steel product pickling pretreatment method of the present invention, and main steps comprise:
[0098] (1) Add electrolyzed water with a pH value of 10-16 in the crucible, heat it to 70-100° C., then place stainless steel in the crucible, and keep it for 5-10 hours to obtain stainless steel treated with electrolyzed water;
[0099] (2) Washing the stainless steel treated with electrolyzed water in dilute sulfuric acid with a mass fraction of 10-15%, a ferrous ion concentration of 100-180mg / L and a temperature of 60-90°C for 15-35min.
[0100] Wherein, the crucible includes: a crucible outer shell 1, a crucible inner shell 4, a conical upper cover 2, an electric furnace wire 3 and a thermocouple 5;
[0101] The electric furnace wire 3 is located between the crucible outer shell 1 and the crucible inner shell 4 for heating the electrolyzed water;
[0102] The conical upper cover 2 is located on the top of the crucible;
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Abstract
The invention belongs to the technical field of steel pickling, and in particular relates to a steel pickling pretreatment method and a product thereof. The method comprises the following steps: adding electrolyzed water into the crucible, heating to 70-100°C, placing the steel material in the crucible and keeping it for 5-10 hours to obtain the steel material treated with electrolyzed water; The treated steel is washed in dilute sulfuric acid for 15-35 minutes; wherein, the pH value of the electrolyzed water is 10-16. The steel pickling pretreatment method of the present invention can completely clean the oxide film on the steel surface, and its effect is better than that of 500-650°C molten alkali leaching, pickling after quenching and other processes, and it is beneficial to improve the on-site working environment , avoid health hazards, safety and environmental protection, and save costs.
Description
technical field [0001] The invention belongs to the technical field of steel pickling, and in particular relates to a steel pickling pretreatment method and a product thereof. Background technique [0002] After steel, especially stainless steel, undergoes high-temperature oxidation, an oxide film is formed on the surface. In the subsequent cold drawing process of the steel, it is necessary to remove the oxide film formed on the surface due to high temperature oxidation, otherwise the oxide film will be pressed into the steel surface during the cold drawing process, affecting the product quality. [0003] in Cr 2 o 3 The main oxide film has stable properties, compact structure, strong adhesion to the steel substrate, and is insoluble in H even at a temperature of 80°C. 2 SO 4 , HCl and HNO 3 and other inorganic acids. Therefore, more aggressive mixed acids such as HNO must be used 3 +HF or H 2 SO 4 +HNO 3 +HCl can remove this kind of oxide film. However, if the ab...
Claims
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IPC IPC(8): C23G1/08C23G1/19C23G3/02
CPCC23G1/081C23G1/19C23G3/021
Inventor 陶科胡静李刚杨庆松孙智聪王刚吴刚
Owner BEIJING SHOUGANG GITANE NEW MATERIALS