The effect of chromium in steel makes hot stamping mold SKD61

According to the Latin text, Chromium is Chromium. China has researched and manufactured a chromium-aluminum alloy with twice the corrosion resistance of ordinary carbon steel. Other countries also produce chromium alloy steel, the metal surface forms a thin layer of sulfate salt with very high corrosion resistance. So how does chromium work for SKD61 hot stamping steel in particular and steel in general?

1. History of stainless steel

The discovery of stainless steel completely random. In 1913, Borio - an English scientist while researching and manufacturing alloys, he created an alloy product containing chromium. But because the feature did not fit the standard, he threw it into the old iron pile. After a long time in the pile of old products, many things have rusted, but the chromium alloy fragments remain unharmed. Borio was astonished, so he continued to study this steel. He eventually became the first person to make stainless alloy steel.

                                     Chromium in steel makes hot stamping SKD61

2. Why stainless steel is resistant to corrosion

Why does stainless steel tolerate corrosion? The reason for this is because chromium is very stable in humid environments. When it comes in contact with Nitoric acid (highly corrosive) right on the metal surface, a very thin layer of Chromium Oxide (Cr2O3) is firmly covered, completely stopping the corrosion of the inner metal layers. . Even in an alloy containing chromium will also form a thin coating stable, against corrosion.

3. The proportion of chromium in steel chemical composition SKD61

Currently companies, businesses have launched SKD61 steel market. In SKD61 steel, the chromium content is usually from 5% - 6% and the carbon content in this steel is very low, only about 0.39%. Because carbon will form carbonization and chromium on the margins of the steel crystals will be separated. The chromium content inside the steel crystal will lower, making the antioxidant and anti-corrosion effects of the steel decrease.

4. How does chromium work for SKD61 hot stamping steel

The "inert" nature of SKD61 steel is explained by chromium being a highly reactive element. Thanks to Chromium, SKD61 steel withstands the wear and oxidation effects that often occur with unprotected carbon steel. Once the chromium content is at 5%, there is a tight, insoluble surface that forms immediately to prevent the oxidation of the surface and prevent the oxidation of iron and steel. The higher the chromium level, the higher the anti-rust level.

SKD61 steel has very high strength and corrosion resistance. When exposed to air, steam, sea water, acid at room temperature and very good corrosion resistance. Therefore, the manufacturing industry often uses SKD61 steel to manufacture machine parts or details such as gears, operating shafts, ... Shipbuilding industry uses stainless steel to make ship and canoe shells. , submarine shells, ... In daily life, people are also familiar with SKD61 steel. SKD61 steel is also used to make medical instruments: scalpels, scissors, cylinders, ...

Hopefully the above information will solve the problems that readers are having. If you want more detailed advice on the type of industrial steel, readers can contact 0332 91 61 61 or chat online with us.
Sevit is pleased to answer all questions from readers!