Stainless steel mother alloy cast ingot surface cleaning method

Abstract

The invention discloses a stainless steel mother alloy cast ingot surface cleaning method. The stainless steel mother alloy cast ingot surface cleaning method comprises the steps that 1, a cleaning liquid component A is prepared; 2, phosphoric acid, p-toluene sulfo acid and ethyl sulfate are mixed according to the mass ratio of 1: 1: (0.2-0.4), and are stirred evenly to obtain a component B; 3, the component A and the component B are mixed evenly according to the mass ratio of 1: (0.18-0.25) to be prepared into cleaning liquid, then a mother alloy cast ingot obtained after casting is immediately soaked in the cleaning liquid, and the cast ingot is taken out after a wrapping layer is formed on the surface of the cast ingot; and 4, the surface of the cast ingot is dried under the condition of 50-60 DEG C, the curved wrapping layer is torn with external force after drying, and the mother alloy cast ingot with the surface being cleaned is obtained. According to the cleaning method, the wrapping layer with certain absorption performance and oil removal performance is formed on the surface of the stainless steel mother alloy cast ingot to be processed, and dirt on the surface of the stainless steel mother alloy cast ingot is removed while the wrapping layer is torn.

Description

technical field [0001] The invention belongs to the field of stainless steel materials, and in particular relates to a method for cleaning the surface of a stainless steel master alloy ingot. Background technique [0002] Stainless steel master alloy ingot refers to the refined stainless steel material. The master alloy ingot is mostly bar or block material, which is generally used for remelting and pouring. Its composition needs to be customized strictly according to the requirements. Various casting processes. The main function of the master alloy ingot is to simplify the control of the smelting process, make the process of production control easier, and improve the quality stability of the casting. [0003] The surface of stainless steel master alloy ingots is easily polluted during the manufacturing process, such as oil (machine oil, lubricating oil, mold oil, etc.) It is also easy to cause oxides to form on the surface of the stainless steel master alloy ingot. In th...

AI Technical Summary

Problems solved by technology

Pickling is the use of inorganic acids, such as nitric acid, hydrochloric acid, phosphoric acid, hydrofluoric acid, etc. to clean the surface of different stainless steel master alloy ingots. Pickling is currently the most widely used stainless steel surface cleaning process, but the shortcomings of pickling are also obvious. , the pickling solution is highly corrosive, and the pickling process will cause the loss of the stainless steel body and the risk of secondary corrosion, especially when the acid solution containing chloride ions is used for cleaning, it is easy to form pitting centers on the stainless steel surface, Affect subsequent use

The efficiency of alkaline cleaning is low, and it has no effect on the removal of oxides and debris on the surface of stainless steel. Moreover, both pickling and alkaline cleaning have the problems of large amount of wastewater generated during the cleaning process and high environmental protection costs. Washing for neutralization, more waste water

Organic cleaning agents can quickly remove oil stains, but it is easy to cause carbon residues on the surface of stainless steel ingots, which will affect the carbon content of stainless steel parts in the subsequent casting process of master alloy ingots, and the stability of the chemical composition of stainless steel parts pose a major problem

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