Production technology for ferrite stainless-steel grinding object with low cost and high corrosion resistance capability
A production process, ferrite technology, applied in the direction of metal material coating process, etc., can solve the problems of long process route, high pressure on environmental protection, acid consumption and high pressure on environmental protection, etc., to reduce costs, save consumption, and improve corrosion resistance sexual effect
Active Publication Date: 2010-03-24
BAOSTEEL DESHENG STAINLESS STEEL
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Problems solved by technology
For example, CN1326012A reported a kind of HNO 3 The pickling and passivation process of adding rare earth cerium oxide in the medium has the disadvantage that the processing time takes 2 hours or more, which is not conducive to continuous production lines, and the acid consumption and environmental protection pressure are also relatively large.
JP11269660 has reported a production method of anti-fingerprint stainless steel plate. The method is to first clean the stainless steel in phosphoric acid, phosphate and nitric acid aqueous solution or a mixed aqueous solution, and then treat it with chromate with a total Cr content of 1 to 40 g / L. Passivation treatment in liquid, Cr coating amount is about 5~200mg / m 2 , and finally coat a layer of transparent organic resin film with a thickness of 0.1-0.5 μm. This method combines passivation treatment and coating treatment to improve the corrosion resistance of stainless steel and at the same time endow stainless steel with anti-fingerprint characteristics. However, this method Three different and independent process steps are used, the process route is long, the pressure on environmental protection is high, and the coating of organic resin film requires an independent coating and baking production line
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1-18
[0023] The production process of the ferritic stainless steel grinding product of the present invention is: hot-rolled black roll, annealing, shot blasting, neutral salt electrolysis, nitric acid electrolysis, HNO 3 +HF mixed acid pickling, neutralization, water washing, drying, cold rolling, continuous annealing, neutral salt electrolysis, HNO 3 Electrolysis, neutralization, washing, drying, grinding, waste nitric acid passivation treatment, leveling, storage.
[0024] In the waste nitric acid passivation treatment process: firstly, the HNO in the stainless steel pickling process section 3 The waste nitric acid in the electrolytic cell is left to stand for 5 to 10 minutes, and after the solid matter entering the pickling solution during the pickling process is precipitated, the upper part of the solution without solid matter is used to prepare a passivation treatment solution, and the acid solution is kept at a standstill. The temperature is 50 ~ 70 ℃. Take the waste acid s...
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The present invention provides a production technology for ferrite stainless-steel grinding object with low cost and high corrosion resistance capability. The production technology flow is that: hot-rolling black skin roller; annealing; shot blasting; neutral salt electrolysing; nitric acid electrolysing; HNO3+HF mixed acid cleaning; neutralizing; washing; drying; cold rolling; continuously annealing; neutral acid electrolysing; HNO3 electrolysing; neutralizing; washing; drying; grinding; passivation by waste nitricacid; levelling and warehousing. The production technology utilizes the waste acid generated by acid cleaning for processing passivation to stainless steel, which saves production cost, increases corrosion resistance capability of the ferrite stainless steel, the point corrosionresistance and salt fog corrosion resistance can reach the level of 304 austenite stainless steel basically.
Description
technical field [0001] The invention relates to a manufacturing process of iron and steel materials, in particular to a production process of a low-cost and high-corrosion-resistant ferritic stainless steel grinding product. Background technique [0002] According to the needs of users, cold rolled stainless steel products have various surface states 2D, 2B, 2BB, BA, ground surface, etc. Because stainless steel abrasives have patterns favored by users, their demand accounts for about 30% of the total stainless steel cold-rolled products, and the abrasive surface is divided into No.3, No.4, and HL. Abrasives are a high value-added product. . The main production process of the existing stainless steel grinding products is: hot-rolled black coil → annealing → shot blasting → neutral salt electrolysis → HNO 3 Electrolysis→HNO 3 +HF mixed acid pickling→neutralization→water washing→drying→cold rolling→continuous annealing→neutral salt electrolysis→HNO 3 Electrolysis→neutraliza...
Claims
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IPC IPC(8): C23C22/24C23C22/37
Inventor 骆素珍毕洪运
Owner BAOSTEEL DESHENG STAINLESS STEEL