Quenching and Tempering Treatment: Quenching can enable the steel to obtain a martensite microstructure. Martensite is a microstructure with high hardness and strength. In the case of reducing the carbon content, a reasonable quenching and tempering process can ensure the strength of the steel. The quenching temperature needs to be accurately controlled according to the composition of the steel to avoid unqualified microstructure due to over - high or over - low temperature. Tempering is to eliminate the internal stress generated by quenching and improve toughness. For example, using low - temperature tempering (150 - 250°C) can improve toughness to a certain extent while maintaining high strength. Within this tempering temperature range, martensite decomposes into tempered martensite, reducing the brittleness of the steel while maintaining high strength.

 

Optimization of Steel Processing Technology

 

Controlled Rolling and Controlled Cooling Technology: During the rolling process of steel, the adoption of controlled rolling technology can refine the grains and improve the strength of the steel. For example, during the hot - rolling process, by controlling parameters such as rolling temperature, number of rolling passes, and reduction amount, the steel can undergo dynamic recrystallization during rolling, thereby refining the grains. At the same time, combined with controlled cooling technology, an appropriate cooling rate can be adopted after rolling to further control the microstructure and properties of the steel. For example, using accelerated cooling technology can enable the steel to obtain a finer pearlite microstructure during the transformation from austenite to pearlite, improving the strength of the steel. This method of improving the strength of steel by controlling the microstructure through processing technology can effectively ensure the strength of steel while reducing the carbon content.

 

 

 

 

 

 

 

LR/FH69 extra high Strength Chemical Composition
Grade	The Element Max (%)
	C	Si	Mn	P	S	Al	N
LR/FH69	0.18	0.55	1.60	0.025	0.025	0.015	0.020
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.03-0.10	0.02

 

 

Forging Process Optimization: For some steels that require forging, optimizing the forging process can also improve the strength when the carbon content is reduced. During the forging process, parameters such as forging temperature, forging ratio, and forging speed should be reasonably controlled. For example, appropriately increasing the forging ratio can make the internal microstructure of the steel more compact and improve the strength. The forging temperature should be determined according to the composition of the steel and the phase diagram to ensure that the steel is forged within an appropriate temperature range and avoid microstructure defects caused by over - heating or over - cooling. By optimizing the forging process, the steel can obtain good strength performance with a lower carbon content.

 

 

 

 

 

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 LR FH69 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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Our factory is committed to upholding the highest standards of safety and quality.
 

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