GL-E690 Steel Plate

 

 

 

Controlling Processing Parameters

 

Controlling Rolling Temperature: During the hot - rolling process, the rolling temperature has a crucial impact on the grain size. For example, reducing the finishing - rolling temperature can effectively refine the grains. For GL - E690 steel, when the finishing - rolling temperature is decreased from a relatively high temperature (such as 1000°C) to a lower temperature (such as 800°C), the degree of dynamic recrystallization is reduced, and the growth of grains is inhibited, thus leading to grain refinement. The lower rolling temperature increases the dislocation density during the deformation process, providing more sites for subsequent recrystallization nucleation. After new nuclei are formed, the atomic diffusion ability is weakened due to the lower temperature during the grain - growth process, and the grain - growth rate becomes slower, ultimately resulting in fine grains.

 

 

 

 

 

 

 

 

 

 

GL-E690 extra High strength property in Tempering and Quenching
Grade	Mechanical Property			Charpy V Impact Test
	Yield	Tensile	Elongation	Degree	Energy 1	Energy 2
GL-E690	Min Mpa	Mpa	Min %	-40	J	J
	690	770-940	14%		46	69

 

 

 

Quenching and Tempering Combined Process: Quenching is a process in which the steel is heated above the critical temperature, held for a certain period of time, and then rapidly cooled. Tempering is a process of heating the steel after quenching. During the quenching process, GL - E690 steel will form a martensite structure. The martensite structure itself has high hardness and strength, but poor toughness. Through tempering, the martensite can be decomposed, and the quenching stress can be eliminated. At the same time, the grain size can be adjusted by controlling the tempering temperature and time during the tempering process. For example, at an appropriate tempering temperature (such as 600 - 650°C) and time (such as 2 - 3 hours), the carbides in the martensite will aggregate and grow, and the grains will also grow appropriately. However, the performance balance can be achieved by optimizing the tempering parameters so that the steel has good comprehensive properties.

 

 

 

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 GL-E690 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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