Method of machining special passivated stainless steel surface

A processing method, stainless steel technology, applied in metal processing equipment, workpiece surface treatment equipment, manufacturing tools, etc., can solve the problems of poor stability, slow production speed, high requirements for resin solution ratio, etc., to achieve surface corrosion resistance improvement, High production efficiency, simple and controllable production process

Active Publication Date: 2013-05-15
NINGBO BAOXIN STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, such materials imported from abroad were generally rolled with rough rolls in the production process, and then coated with resin to control the roughness and gloss of the final product. The disadvantage of this process is that the resin solution The ratio requirements are very high, and the production speed is slow and the stability is poor. Moreover, for traditional stainless steel enterprises, it is necessary to configure additional surface coating production lines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In this example, the material is a special passivated surface of 301 steel, the plate thickness is 2.0mm, the surface roughness is required to be controlled at 0.8-1.0um, and the gloss (60°) is required to be between 25-45.

[0016] The specific implementation steps are as follows:

[0017] 1) Cold rolling the raw material:

[0018] During cold rolling in the rolling mill, the roughness of the rolls is controlled at 2.0um, the cold rolling reduction rate is controlled at 6%, the amount of rolling lubricating oil is controlled at 3500L / Min, the rolling speed is kept below 200mpm, and the unit tension distribution of the rolling mill is , front tension 18kg / mm 2 , the back tension is 16kg / mm 2 .

[0019] 2) Passivation of the material after cold rolling

[0020] During pickling and annealing, set the furnace temperature of the annealing furnace at 450 (+ / -50°C), and the unit tension of the furnace section is 0.45~0.80kg / mm 2 , The ratio of pickling solution in the pi...

Embodiment 2

[0022] In this example, the material is a special passivated surface of 301 steel, the plate thickness is 2.5mm, the surface roughness is required to be controlled at 1.0-1.2um, and the gloss (60°) is required to be between 25-45.

[0023] The specific implementation steps are as follows:

[0024] 1) Cold rolling the raw material:

[0025] During cold rolling in the rolling mill, the roughness of the rolls is controlled at 2.5um, the cold rolling reduction rate is controlled at 6.5%, the amount of rolling lubricating oil is controlled at 3000L / Min, the rolling speed is kept below 200mpm, and the unit tension distribution of the rolling mill is , front tension 18kg / mm 2 , the back tension is 16kg / mm 2 .

[0026] 2) Passivation of the material after cold rolling

[0027] During pickling and annealing, set the furnace temperature of the annealing furnace at 450 (+ / -50°C), and the unit tension of the furnace section is 0.45~0.80kg / mm 2 , The ratio of pickling solution in the ...

Embodiment 3

[0029] In this example, the material is a special passivated surface of 301 steel, the plate thickness is 2.5mm, the surface roughness is required to be controlled at 1.2-1.5um, and the gloss (60°) is required to be between 35-55.

[0030] The specific implementation steps are as follows:

[0031] 1) Cold rolling the raw material:

[0032] During cold rolling in the rolling mill, the roughness of the rolls is controlled at 3.0um, the cold rolling reduction rate is controlled at 6%, the amount of rolling lubricating oil is controlled at 2500L / Min, the rolling speed is kept below 150mpm, and the unit tension distribution of the rolling mill is , front tension 20kg / mm 2 , the back tension is 18kg / mm 2 .

[0033] 2) Passivation of the material after cold rolling

[0034] During pickling and annealing, set the furnace temperature of the annealing furnace at 450 (+ / -50°C), and the unit tension of the furnace section is 0.45~0.80kg / mm 2 , The ratio of pickling solution in the pi...

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Abstract

The invention relates to a method of machining a special passivated stainless steel surface. The method includes a first step of cold rolling raw materials, rolling by adopting roller with 2.0 micrometers to 3.0 micrometers of roughness Ra, controlling cold rolling reduction rate within 5% to 10%, controlling rolling lubrication oil amount within 2000 liters per minute to 4000 liters per minute, a second step of passivating cold rolled materials, conducting annealing and pickling on cold rolled surfaces, controlling furnace temperature of an annealing furnace within 350 DEG C to 550 DEG C, controlling ratio of acid liquid in an acid groove to be 10 grams per liter to 25 grams per liter of hydrofluoric acid (HF) to 80 grams per liter to 200 gram per liter of hydrogen nitrate (HNO3), controlling pickling passivation temperature within 40 DEG C to 60 DEG C, and controlling running speed within 25 meters per minute to 40 meters per minute. Due to the facts that machining is conducted with the help of devices in a stainless steel enterprise and similar products are produced without need of additionally configuring a surface coating production line, production cost is greatly saved. Due to the fact that production technology process is relatively simple and controllable, production efficiency is high. Due to the fact that corrosion resistance of the surfaces which are pickled and passivated is greatly improved, stability is good.

Description

technical field [0001] The invention relates to a processing method for a special passivated surface of stainless steel. Background technique [0002] Among the product categories of stainless steel cold-rolled sheets, there is a special surface that is difficult to produce, requiring simultaneous control of surface roughness and gloss. 0.8-1.2um (micron), gloss (60.) Requirements between 25-45. In the past, such materials imported from abroad were generally rolled with rough rolls in the production process, and then coated with resin to control the roughness and gloss of the final product. The disadvantage of this process is that the resin solution The ratio requirements are very high, and the production speed is slow and the stability is poor. Moreover, for traditional stainless steel enterprises, it is necessary to configure a surface coating production line. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/28B21B45/00
CPCC23C22/34C23G1/086
Inventor 郑涛杜海宪洪流戴科栋刘亚军
Owner NINGBO BAOXIN STAINLESS STEEL
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