Gangzheng Global Network

Technical consultation

What is polyester modified coating?
Answer:Polyester modified coating is polyester coating, that means uses cost to be low, weather resistant sex to be poor namely, alkyd and poor pigment or the material such as dyeing material synthesis, this coating also accides with polyester coating general characteristic. Modified coatings have been widely used since 2007, but due to the poor durability of the chemical bonds of resins synthesized by replacing raw and auxiliary materials, pulverization appears naturally after fracture. The pigment of the coating is synthetic artificial dye, under the action of ultraviolet molecules in the excited state and become extremely unstable, easy to produce some chemical reactions, so that the pigment decomposition and fade. With the gradual improvement of people's understanding, the use of good weatherability authentic coating products, has become a social consensus.

How to control the paint quality?
Answer:1. Review the technical capability, production process and equipment of paint suppliers.
2. Conduct irregular on-site review of raw and auxiliary materials in the supply chain.
3. Review the supplier's staff and front-line staff.
4. Review suppliers' cooperation partners and goodwill degree.
5. Set quality control target: resistant to neutral salt spray test time is more than 800 hours (GB 480 hours); The foaming density of the sample is not more than 1 grade (national standard is not more than 3 grade); The size of the bubble is no more than S2.Accelerated aging test UVB-313 test time is not less than 600 hours (national standard 400 hours), the sample has no foaming, cracking, pulverization is not more than 1 level.

What is the process quality of color coated steel plate of nantong glory ?
Answer:Traditional process quality is the technical elements and process configuration.Today has entered the information, intelligent era, Nantong glory color painting equipment has included the process of various technical elements, functions, data and other required solutions,to achieve full intelligence, high precision, programmed control.Scientific process control is to ensure the color steel scratch resistance, hardness, T bend, color difference, leveling and other quality key, is the product of high precision requirements, processing requirements, the basis of service life.

Different uses of color steel sheet substrate are applicable to what substrate grade?
Answer:Architectural color steel using SPHC, general use of Q195L.
High strength color steel using SAE1022, common high strength using Q235.
In strong color steel using SAE1018, SAE1015, general use of Q195.
TDC52D material using SPHD, TDC53D material using SPHE, TDC54D above using IF.

What is the content of chemical elements in different substrates?
The amount of chemical elements in different materials:
Raw material       Chemical elements
  C Si Mn P S
SPHC 0.03-0.05 0.02-0.03 0.15-0.24 0.024-0.037 0.002-0.011
SPHD 0.02 0.01 0.15 0.007 0.012
SPHE ≤0.02 0 0.15 0.01 0.011
IF 0 0 0.11-0.28 0.014-0.015 0.007-0.008
SAE1015 0.13-0.18   0.30-0.60 ≤0.04 ≤0.05
SAE1018 0.15-0.20   0.60-0.90 ≤0.04 ≤0.05
SAE1018 0.18-0.23   0.70-1.0 ≤0.04 ≤0.05
Q195 0.06-0.08 0.12-0.13 0.26-0.28 0.011-0.018 0.018-0.022
Q195L 0.05-0.06 0.01-0.02 0.18-0.19 0.024-0.027 0.012-0.022
Q235 0.12-0.22 ≤0.30 0.30-0.80 ≤0.045 ≤0.05

It can be seen from the above table that the softness and hardness of the plate are related to the content of carbon (C) and manganese (Mn) elements, and the carbon element of IF steel is zero. The plate is very soft and suitable for deep drawing products with high requirements.

What requirments does base material quality have ?
Answer:Color-coated substrate is galvanized sheet, galvanized sheet substrate is cold roll, cold roll substrate is hot roll.Currently applicable to the production of color coated substrate are hot rolled roll brands: SPHC, SPHD, SPHE; Q195, Q195L, Q235; SAE1022, SAE1018, SAE1015, IF; The above grades correspond to different uses of color coated sheet, there are large-span structure of high-strength sheet, there are suitable for high elongation strong sheet, there are suitable for high elongation pressure plate, there are suitable for better elongation deep stamping sheet, etc. The choice of raw material and the fusion of galvanizing process can ensure the quality of color coating substrate.

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