Carbon Steel

 

Low - Carbon Steel

 

Low - carbon steel (with a carbon content generally less than 0.25%) mainly consists of ferrite and a small amount of pearlite in its normal microstructure. When decarburization occurs, the ferrite grains will grow, and the proportion of pearlite will further decrease. For example, some low - carbon steel components used in building structures may undergo decarburization if they are exposed to high - temperature environments during processing or use. Through metallographic inspection, the changes in the surface ferrite can be observed to determine the decarburization status.

 

 

 

Alloy Steel

 

Low - Alloy Steel

 

Low - alloy steel is formed by adding a small amount of alloying elements (such as manganese, silicon, chromium, nickel, etc.) to carbon steel. The addition of alloying elements will change the metallographic structure and performance of the steel. During the decarburization process, the change pattern of its metallographic structure is similar to that of carbon steel. However, due to the influence of alloying elements, there may be some special circumstances. For example, the chromium element can improve the antioxidant property of steel, and low - alloy steel containing chromium can resist decarburization to a certain extent. Nevertheless, when decarburization occurs, through metallographic inspection, changes in structures such as ferrite and pearlite can still be observed, as well as the decomposition or reduction of alloy carbides.

 

High - Alloy Steel

 

High - alloy steel contains a relatively high proportion of alloying elements, and its metallographic structure is more complex. For example, stainless steel (with the main alloying elements of chromium and nickel) normally has austenite and other structures. In a decarburization environment, in addition to the change in the carbon element, the distribution of alloying elements may also change. For example, in a high - temperature corrosive environment, stainless steel may experience decarburization. Metallographic inspection can observe the reduction of carbides and possible accompanying changes in grain boundaries, which is of great importance for studying the corrosion and decarburization mechanisms of stainless steel.

 

 

 

 

 

 

Grade A shipbuiling steel plate specification:
Thickness: 4mm to 260mm,
Width: 1200mm to 4000mm
Length: 3000mm to 18000mm.

 

Tool Steel

 

Carbon - based Tool Steel

 

Carbon - based tool steel has a relatively high carbon content and is mainly used for manufacturing cutting tools, molds, and other tools. Its normal metallographic structure contains more pearlite and cementite to ensure the high hardness and wear - resistance of the tools. Decarburization will seriously affect the performance of tool steel. Through metallographic inspection, the reduction of pearlite and cementite in the decarburized layer and the increase of ferrite can be observed to accurately determine the degree of decarburization, thus ensuring the quality of the tools. For example, in cold - working die steel, decarburization will lead to a decrease in the surface hardness of the die, affecting the service life of the die. Metallographic inspection can promptly detect this decarburization situation.

 

Alloy - based Tool Steel

 

Alloy - based tool steel contains a variety of alloying elements, such as tungsten, molybdenum, and vanadium. These elements will form special carbides and improve the performance of tool steel. During decarburization, in addition to the change in the carbon element, the alloy carbides may also decompose or decrease. For example, in high - speed steel (containing elements such as tungsten, molybdenum, and vanadium), decarburization will lead to a decrease in the red - hardness of the high - speed steel. Metallographic inspection can detect the changes in alloy carbides, which is of great importance for controlling the heat - treatment quality of tool steel and preventing decarburization.

 

 

 

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We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our ABS Grade A Shipbuilding Steel Plate, and develop new technical specifications and processes.
Our customers trust us to deliver high-quality Cold-rolled Steel products on time and on budget.
We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
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All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

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