Basic properties of electrogalvanized sheets

1. Classification of steel plates (including steel strips):

1. Classification by thickness: (1) thin plate (2) medium plate (3) thick plate (4) extra thick plate

2. Classification according to production method: (1) Hot-rolled steel plate (2) Cold-rolled steel plate Electro-galvanized plate English

3. Classification according to surface characteristics: (1) Galvanized sheet (hot-dip galvanized sheet, electro-galvanized sheet) (2) Tin-plated sheet (3) Composite steel sheet (4) Color-coated steel sheet

4. Classification by use: (1) Bridge steel plate (2) Boiler steel plate (3) Shipbuilding steel plate (4) Armor steel plate (5) 3d printed automobile engine block (6) Roofing steel plate (7) Structural steel plate (8) Electrical steel plate (silicon steel sheet) (9) Spring steel plate (10) Others

2. Common Japanese brands in general and mechanical structural steel plates

1. Ordinary structural steel in Japanese steel (JIS series) grades is mainly composed of three parts: the first part represents the material, such as: S (Steel) represents steel, F (Ferrum) represents iron; the second part represents different shapes and types , purpose, such as P (Plate) represents plate, T (Tube) represents tube, K (Kogu) represents tool; the third part represents the characteristic number, generally the minimum tensile strength. For example: SS400 – the first S represents steel, the second S represents “structure”, 400 is the lower limit tensile strength of 400MPa, and the overall represents ordinary structural steel with a tensile strength of 400MPa. ​

2. SPHC – the first S-position is the abbreviation of Steel, P is the abbreviation of Plate, H is the abbreviation of Heat, and C is the abbreviation of Commercial. The overall representation generally uses hot-rolled steel plates and steel strips. ​

3. SPHD——Indicates hot-rolled steel plates and steel strips for stamping. ​

4. SPHE——represents hot-rolled steel plates and strips for deep drawing. ​​

5. SPCC – indicates generally used cold-rolled carbon steel sheets and strips, equivalent to China’s Q195-215A grade. The third letter C is the abbreviation of Cold. When it is necessary to ensure the tensile test, add T at the end of the grade to indicate SPCCT. ​

6. SPCD – represents cold-rolled carbon steel sheets and steel strips for metal stamping automotive, equivalent to China’s 08Al (13237) high-quality carbon structural steel. ​​

7. SPCE – represents cold-rolled carbon steel sheets and strips for deep drawing, equivalent to China’s 08Al (5213) deep drawing steel. When non-timeliness needs to be ensured, add N to the end of the grade to indicate SPCEN. ​

Quenching and tempering codes of cold-rolled carbon steel sheets and steel strips: annealing state is A, standard quenching and tempering is S, 1/8 hardness is 8, 1/4 hardness is 4, 1/2 hardness is 2, and hardness is 1. Surface processing code: D for matte finish rolling and B for bright finish rolling. For example, SPCC-SD represents standard quenched and tempered, matte finish rolling, generally used cold-rolled carbon sheets. Another example is SPCCT-SB, which represents cold-rolled carbon sheets with standard tempering and bright processing, requiring guaranteed mechanical properties. ​

8. The expression method of steel grade for JIS mechanical structure is:

S + carbon content + letter code (C, CK), forged carbon steel special shaped split flange is expressed by the intermediate value × 100. The letter C: represents carbon. K: represents carburizing steel. For example, the carbon content of carbon rolled plate S20C is 0.18-0.23%. Electroplating 1. The electroplating of zinc-nickel alloy coating was realized using novel additives and-complexing agents. Through orthogonal test methods, new additives and complexing agents were used Zinc-nickel alloy electroplating was realized, and a new zinc-nickel alloy electrodeposition process and plating solution formula were optimized. 2. The pretreatment before plating, electroless plating and electroplating processes are introduced. A method of electroplating metal on the surface of Bragg light grating (FBG) is proposed to protect the fiber grating. 3.A porous membrane was deposited on the surface of the porous nickel materials prepared by sintering by electroplating method. For nickel porous materials prepared by sintering method, electroplating method was used to generate porous films for surface modification. The research results show that: pH, polar distance, additive dosage, Ni2+ concentration, plating time, current density and temperature have a greater impact on the air permeability and maximum pore size of the membrane. Based on the results of the orthogonal test and comprehensive consideration of the air permeability and maximum pore size of the product, the optimal air permeability and maximum pore size were determined. The optimal conditions are: pH 4.5~5, pole distance 60 mm, Ni2+ concentration 20 g/L, additive dosage 0.15 g/L, current density 300 A/m2, plating time 20 min, temperature 40°C. It can be produced under these conditions have to