Marine Shipbuilding High Strength Steel Plate

 

The production process of AH32 hot rolled shipbuilding marine steel plate has specific requirements in the following aspects:

 

Raw material selection:

Base metal: The choice of raw steel is crucial. The carbon content should be strictly controlled, generally not exceeding 0.20% to ensure good weldability and toughness.

Alloy elements: Appropriate amounts of alloy elements such as manganese, niobium, titanium, and vanadium are added. Manganese is the main alloying element, which can improve the strength and toughness of the steel. Trace amounts of niobium, titanium, or vanadium can form fine carbides or carbonitrides in the steel, helping to obtain fine ferrite grains and enhance the strength and toughness of the steel. In addition, a small amount of copper (≤0.4%) and phosphorus (about 0.1%) can be added to improve the corrosion resistance. And a small amount of rare earth elements can be added to desulfurize, degasify, purify the steel, and improve the toughness and process performance.

Smelting process:

Smelting method: Usually, electric furnace smelting is used to ensure the purity of the steel. The smelting process needs to strictly control the content of impurities such as sulfur, phosphorus, nitrogen, oxygen, and hydrogen in the steel to meet the quality requirements3.

Composition adjustment: During the smelting process, the composition of the steel is adjusted in real-time according to the designed chemical composition requirements to ensure that the content of each element is within the specified range.

 

 

 

°F	YS 0.2% KSI	YS 1.0% KSI	UTS KSI	Elongation %
68	58	64	87	25
212	48	53	83	25
392	41	45	77	20
572	33	38	71	20

 

 

 

 

Casting process:

Casting temperature: The casting temperature needs to be accurately controlled. If the temperature is too high, it may cause defects such as porosity and segregation in the steel; if the temperature is too low, it may lead to insufficient filling of the mold and other problems.

Mold selection: Appropriate molds are selected to ensure the shape and size accuracy of the cast slab. At the same time, measures such as mold vibration and cooling control are taken to improve the quality of the cast slab.

Rolling process:

Rolling temperature: The heating temperature of the slab before rolling is an important parameter. It needs to be heated to a suitable temperature range to ensure that the steel has good plasticity and formability during rolling. The initial rolling temperature is generally around 1100-1200°C, and the finishing rolling temperature is controlled at about 850-950°C.

Rolling reduction: Reasonable rolling reduction is set in each pass of rolling to ensure that the internal structure of the steel is uniform and the mechanical properties are stable. The total rolling reduction ratio is usually controlled within a certain range to obtain the desired plate thickness and performance.

 

 

 

 

 

 

Why Choose Us?
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 Marine Shipbuilding High Strength 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.
We adhere to the customer-centric and brand-oriented business philosophy, and continue to provide customers with reliable and excellent products and services.
Our factory is committed to upholding the highest standards of safety and quality.
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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