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Steel Coil Sheet According To The Law Points
- Nov 01, 2017 -

steel coil sheet According to the law points

How to improve the quality of stainless steel plate surface measures

Stainless steel plate widely used in petroleum, chemical, mechanical, energy, nuclear power and other industries, the production of the following more prone to surface quality problems:

steel coil sheet According to the law points

1, blank grinding

Blank with coarse grinding wheel, grinding in the plate surface will appear wear marks, especially in the 20mm above the thick plate.

2, slide scratches

Heating furnace, stainless steel heating temperature is higher than the ordinary carbon steel, stainless steel billet in the slide movement, easy in the blank under the surface of the slide scratches.

3, rolling pressure pit

On the middle of the plywood and the edge of the plate friction, resulting in edge glitches and other splashing to the surface of the plate, the formation of surface rolling pressure pit.

4, big chain scratches

The loss of the chain between the steel plate in the cooling bed is not synchronized, forming the next surface scratches.

5, the bottom of the roll pressure pit

The bottom of the furnace by the high temperature gas and load and other multiple effects, prone to surface nodulation, resulting in the plate under the surface pressure pit.

6, straightening machine pressure pit

Straightened carbon steel left oxide, in the straightening of stainless steel process is easy to form a stainless steel plate surface pressure pit.

7, hanging scratches

Hanging steel plate is likely to cause edge rib injury, as well as in the discharge of non-standard operation caused by steel surface scratches.

Improvements:

1, blank grinding

The steelmaking process uses the coarse grinding wheel to grind the surface of the blank, and then uses the fine grinding wheel to reduce the wear depth of the blank surface, so as to avoid the rolling surface of the steel plate wear marks.

2, slide scratches

Select a higher temperature during the heating phase to ensure that both billet burns are burned and a lower heating temperature is used during the soaking phase. When the furnace is overhauled, the oxidized bond of the slider on the chute of the heating furnace is polished in time to replace the damaged slider.

Two types of hot and cold rolled, including thinner plates with a thickness of 0.5.10-885 mm and 72938 and 4.5-100 mm plates.

It is resistant to various acids such as oxalic acid, sulfuric acid-ferric sulfate, nitric acid, nitric acid-hydrofluoric acid, sulfuric acid-copper sulfate, phosphoric acid, formic acid and acetic acid. It is widely used in chemical, food, medicine, paper, oil and so on. Industrial, as well as construction, kitchen utensils, tableware, vehicles, household appliances various types of components.

In order to ensure the yield strength, tensile strength, elongation and hardness of various stainless steel plates meet the requirements, the steel plate must be annealed before heat treatment, solution treatment, aging treatment and other heat treatment 05.10 88.57.29.38 special symbols.

The corrosion resistance of stainless steel depends mainly on its alloy composition (chromium, nickel, titanium, silicon, aluminum, manganese, etc.) and the internal structure.

Two kinds of hot rolling and cold rolling are classified according to the organization characteristics of the steel. They are classified into five types: austenitic, austenitic-ferrite, ferrite, martensite and precipitation hardening.

Stainless steel plate surface smooth, have a high plasticity, toughness and mechanical strength, acid, alkaline gases, solutions and other media corrosion. It is a kind of stainless steel is not easy to rust, but not absolutely no rust.