Alle Artikel von juniperqq

Classification Of Galvanized Sheets

China Galvanized Steel Roofing Sheet manufacturer

How should galvanized sheets be classified? China Galvanized Steel Roofing Sheet manufacturer understands two classification methods: one is based on the high quality Galvalumed steel panel, the other is based on the coating. Now let’s talk about the classification of installation substrates.

A. Carbon steel galvanized

The continuous hot-dip galvanizing of steel strips is mostly made of ordinary low-carbon steel, and its carbon content is between 0.10% and 0.20%. The galvanizing characteristics are similar to those of industrial pure iron. When hot-dip galvanizing is performed on ordinary low-carbon steel as a substrate, the most influential elements of the composition are carbon and silicon. In general, the higher the carbon content in the steel, the stronger the zinc-iron reaction, the larger the iron loss, and the thicker the alloy coating formed, making the coating brittle, the plasticity is poor, and the plating adhesion is poor. In addition, the high carbon content in the steel will also affect the surface quality of the coating, and often lead to the occurrence of leakage plating, and it is also easy to form zinc.

With the development of the automotive industry, there is an increasing demand for cold forming properties such as deep drawing of carbon steel. The carbon content in steel is desirably reduced as much as possible. For example, the carbon content of general stamped steel is less than 0.10%, and commonly used carbon. The content of not more than 0.08% (such as 08Al), the carbon content of high-quality stamped steel is not more than 0.04% (such as K08Al), while the ultra-deep stamped steel (such as gap-free atomic IF steel) reaches a carbon content of not more than 0.005%.

B. High-strength steel galvanized

In order to meet the needs of weight reduction, energy saving and safety of the automobile manufacturing industry, one of the main users of hot-dip galvanized steel sheets, hot-dip galvanized steel sheets with high-strength steel sheets as substrates have been developed rapidly. At present, high-strength steel plates that have been developed or are being developed abroad include IF high-strength steel, bake hardened steel, low-alloy high-strength steel, dual-phase steel, and phase-change-induced plastic steel, carbon-manganese high-strength steel, and martensitic steel. The level of strength they can achieve.

How To Prevent Metal From Eroding Galvanized Corrugated Steel Sheet?

China Wave Type Galvanized Corrugated Steel Sheet

How to prevent metal from eroding China Wave Type Galvanized Corrugated Steel Sheet? There are many common methods. It is a very effective method to plate one or more layers of metal that is not easily rusted to isolate the air from the steel surface. Among the various metals plated, the price of galvanized steel sheets is not too high, and the steel sheet with the best rust prevention ability.

Why is the zinc coating very good against rust? First, China Galvanized Steel Roofing Sheet manufacturer introduces the zine itself. Zinc is a blue-white metal with a density of 7.14 g/cm3, a relative atomic mass of 65.37, an atomic number of 30, and a melting point of 19.58 T. It becomes a vapor when it is redundant, and the hardness of zinc is 490 MPa. It is very brittle at normal temperature, but it has good ductility at 100~150. Zinc forms a very thin oxide film in the air, or a very thin basic zinc carbonate film, which prevents the zinc layer from being further oxidized.

Zinc is a very active amphoteric metal – soluble in both acid and alkali.

Since zinc is an amphoteric metal (that is, it is afraid of acid and alkali), how does it protect steel from rust? How can it prevent itself from being tempted? The original rust prevention lies in steel and zinc coating. A micro battery is formed between them.

First, the zinc coating is plated on the surface of the steel. At this time, the liquid (sulfurous acid or carbonic acid, etc.) formed by the aggressive gas in the atmosphere is only in contact with the zinc and electrochemically reacts with the zinc.

When there are pores or defects in the zinc coating, the acidic aqueous solution in the atmosphere enters the steel and zinc layer along the pores or defects. At this time, the zinc-iron-acid solution formed a complete micro battery.

Composition Of Cheap Grinding Disc

The cheap grinding disc structure generally consists of a working layer, a base body, and a transition layer.

The working layer, also known as the diamond layer, consists of abrasives, binders, and fillers and is the working part of the cheap grinding disc. The transition layer, also called a non-diamond layer, consists of a binder, a metal powder, and a filler, and is a portion that firmly bonds the diamond layer to the substrate.

The base body is used to receive the abrasive layer and is firmly clamped to the grinding machine spindle by a flange during use. Generally, the metal bond product is selected from steel and alloy steel powder as the matrix; the resin bond is selected from aluminum alloy and bakelite as the matrix. It is made of aluminum, steel or bakelite and functions as a supporting working layer and a chucking tool. The quality of the grinding disc and the accuracy of its use are closely related to the substrate.

Due to the characteristics of diamond abrasives (high hardness, high compressive strength, and good wear resistance), diamond grinding tools are an ideal tool for grinding hard and brittle materials and hard alloys in grinding, which is not only efficient but also highly accurate. High and the roughness is good, the abrasives are used less, the service life is long, and the working conditions can be improved. Therefore, it is widely used in low-iron content metal and non-metal hard and brittle materials, such as cemented carbide, high-aluminum porcelain, optical glass, agate gemstone, semiconductor material, stone, etc., which are difficult to process with ordinary abrasive tools.

PPGI Galvanized Steel Coil Use And Classificat

PPGI Galvanized Steel Coil Use And Classification

High quality PPGI prepainted galvanized steel coil overview. The color coating roll is made of hot-dip galvanized sheet, hot-dip aluminum-zinc plate, electro-galvanized sheet, etc., after surface pretreatment (chemical degreasing and chemical conversion treatment), and then coating one or several layers of organic coating on the surface, followed by A product that has been baked and cured. It is also named for its color coated steel coils coated with various colors of organic paints. In addition to the zinc layer protection, the color coating steel strip using the hot-dip galvanized steel strip as the substrate protects the organic coating on the zinc layer from rusting and the service life is longer than that of the galvanized strip. 1.5 times.

High quality prepainted color galvanized coil use. Color coated rolls are light, beautiful and have good anti-corrosion properties, and can be directly processed. The colors are generally divided into gray, sea blue and brick red, which are mainly used in advertising, construction, home appliance industry, electrical industry, furniture industry and transportation. industry. The coatings used in the color coating roll are selected according to the use environment, such as polyester silicon modified polyester, polyvinyl chloride plastisol, polyvinylidene chloride and the like. Users can choose according to their purpose.

Coating structure. Coating structure type 2/1: The upper surface is coated twice, the lower surface is coated once, and baked twice. 2/1M: The upper and lower surfaces are coated twice and baked once. 2/2: The upper and lower surfaces are coated twice and baked twice. v Use of different coating structures: 2/1: Single layer back paint has poor corrosion resistance and scratch resistance, but has good adhesion, mainly used for sandwich panels; 2/1M: back paint It has good corrosion resistance, scratch resistance and processability, and has good adhesion. It is suitable for single-layered panels and sandwich panels. 2/2: The double-layer back paint has good corrosion resistance, scratch resistance and processability, and most of them are used for single-layer laminates, but their adhesion is poor and should not be used for sandwich panels.

Precautions For The Use Of Hot Sale Aluminum Zinc Steel Coil

hot sale aluminum zinc steel coil

Precautions for the use of hot sale aluminum zinc steel coil

First, if it is to be put into operation, the temperature should not be overheated or too cold at normal temperature. If it is used as a roof, the height should not be lower than 10 degrees.

Second, before the installation of aluminum zinc steel coil in stock, timely inspection to ensure that the roof material has no wear and tear, to ensure that it can be used normally, to ensure the life of the application under normal conditions.

Third, the bolt head of the fixed color coated aluminum coil should be sealed with a waterproof material to prevent rain from entering the rust.

Fourth, the ambient temperature of color-coated aluminum coil processing should be above 7 °C. The gap of the processing roller system should be adjusted according to the thickness of the color-coated aluminum coil, and the foreign objects on the roller surface and the pallet should be removed. Whether the surface is stripped, such as stripping paint, the cause should be identified and the measures must be taken before processing can continue.

Shandong HENGZE New Material Co., Ltd. with China prepainted color galvanized coil factory is a China galvanized steel coil supplier and manufacturer.

Contact: Elijah Wen

E-mail:export04@sdhengzesteel.com

Something About Aluminum Zinc Steel Coil You Don’t Know

hot sale aluminum zinc steel coil

Something about hot sale aluminum zinc steel coil you don’t know

First, if you want to put it into use, you should not overheat or too cold at normal temperature. If you are a roof, the height should not be less than 10 degrees.

Secondly, before the installation, check in time to ensure that the material of the roof does not show wear and tear, to ensure that it can be used normally, and to ensure the service life under normal circumstances.

Thirdly, the bolt head of the fixed China aluminum zinc steel coil should be sealed with a strong waterproof material to avoid the rusting of rainwater.

Fourthly, the environmental temperature of color-coated aluminium coil processing should be above 7 degrees Celsius. The clearance of the roll system should be adjusted according to the thickness of the color-coated aluminium coil, and the foreign bodies on the roll surface and the pallet should be removed.

At the same time, it is necessary to check whether the double sides of the color-coated aluminium coil are de-painted, such as de-painted, the reasons should be identified and measures adopted before continuous processing can be carried out.

 

China galvanized steel coil supplier and manufacturer

Company name: Shandong HENGZE New Material Co., Ltd.

Address: High Technology Industrial Development Zone, Taian, China

Contact: Elijah Wen

E-mail: export04@sdhengzesteel.com

Depressed Grinding Disc In Stock Storage Tips

When the depressed grinding disc in stock is in storage, the grinding disc cannot be rolled to avoid cracks and surface damage, and it is not subject to strong vibration and impact.

Roller manufacturing precision, using the internal grinding method grinding disc manufacturing process, can stably produce high-precision, complex surface roller, the service life reaches 20,000 to 50,000 times, the storage time of the grinding disc should not exceed the effective period of the grinding disc, the grinding disc of resin and rubber bond From the date of leaving the factory, if the storage time exceeds one year, it must be passed after the swing test is passed.

Diamond tools for processing hard and brittle materials mainly include various diamond saws and diamond products. Although the application range and processing characteristics of various tools are different, the wear mechanism is almost the same. The storage place of the depressed grinding disc in stock should be kept dry and the temperature is suitable to avoid. Mix with other chemicals. Prevents the disc from getting wet, low temperature, overheating and corrosion by harmful chemicals.

China Long Life Grinding Wheel Type

China long life grinding wheel

China long life grinding wheel type

Parallel long life grinding wheel: mainly used for cylindrical grinding and edge machining of cemented carbide.

Parallel arc grinding wheel: mainly used for forming grinding of hard alloy and forming grinding of circular arc surface.

Double-sided concave grinding wheel: mainly used for grinding measuring tools and coreless grinding machines.

Double beveled China long life grinding wheel: mainly used for forming grinding of hard alloy gear hobs and thread cutters.

Bowl-shaped long life grinding wheel: mainly used for sharpening of carbide tools, high-speed steel tools, and also for milling and grinding of hard alloy gear hobs and thread cutters.

Galvanized Steel Coil Advantages

hot dip galvanized steel coil for sale

Hot dip galvanized steel coil for sale has been widely used in various industries such as construction and home appliances since its introduction. Due to the ever-expanding range of use, the product’s formability and various properties of the steel sheet are continuously improved, and thus the galvanized steel sheet which is superior to the hot dip galvanized steel coil for sale in some properties is produced.

Hot dip galvanized steel coil is an AL-Zn-plated aluminum-zinc-plated steel coil obtained by hot-dip plating using a cold-rolled hard steel coil of various strengths and thicknesses as a base material. The coating composition is 55% aluminum, 43.5% zinc, 1.5% silicon and appropriate trace elements.

Tips For Storing Depressed Grinding Disc In Stock

depressed grinding disc in stock

Usually we have the depressed grinding disc in stock, so what are the storage techniques? The following Henan Aurora Abrasive Tool Co., Ltd. will share the storage skills of diamond grinding discs:

When the grinding disc is in storage, the grinding disc cannot be rolled to avoid cracks and surface damage, and it is not subject to strong vibration and impact.

Roller manufacturing precision, using the internal grinding method grinding disc manufacturing process, can stably produce high-precision, complex surface roller, the service life reaches 20,000 to 50,000 times, the storage time of the depressed grinding disc in stock should not exceed the effective period of the grinding disc, the grinding disc of resin and rubber bond From the date of leaving the factory, if the storage time exceeds one year, it must be passed after the swing test is passed.

Diamond tools for processing hard and brittle materials mainly include various diamond saws and diamond products. Although the application range and processing characteristics of various tools are different, the wear mechanism is almost the same. The storage place of the depressed grinding disc in stock should be kept dry and the temperature is suitable to avoid. Mix with other chemicals. Prevents the disc from getting wet, low temperature, overheating and corrosion by harmful chemicals.