550-MPa non-water-cooling thermomechanical control process steel and production method thereof
A thermomechanical control and production method technology, applied in the field of thermomechanical control technology, can solve the problems of residual stress, poor cooling rate, low strength and toughness, etc.
Active Publication Date: 2015-10-14
武汉钢铁有限公司
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Problems solved by technology
[0004] The invention provides a 550MPa grade non-water-cooled thermomechanical control process steel and its production method, which solves or partially solves the problem of accelerated water cooling after controlled rolling in the prior art, which easily causes the difference in cooling speed between the surface and the inside of the steel plate and causes the surface and inside of the steel plate to produce Residual stress, resulting in technical defects of low strength and toughness of steel
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example 1
[0039] In Example 1, the chemical composition of the process steel can be as follows: 0.08%C, 1.5%Mn, 1.0%Si, P≤0.010%, S figure 2 As shown, the mechanical properties can be shown in Table 1 below.
example 2
[0041] In Example 2, the chemical composition of the process steel can be as follows: 0.08%C, 1.5%Mn, 1.0%Si, P≤0.010%, S image 3 As shown, the mechanical properties can be shown in Table 1 below.
example 3
[0043] In Example 3, the chemical composition of the process steel can be as follows: 0.045%C, 1.0%Mn, 0.7%Si, P≤0.010%, S Figure 4 As shown, the mechanical properties can be shown in Table 1 below.
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Abstract
The invention provides 550-MPa non-water-cooling thermomechanical control process steel and a production method thereof. The process steel at least comprises 0-0.08% of C, 0-0.010% of P, 0-0.005% of S, 1.0%-1.5% of Mn, 0.70%-1.0% of Si, 0.2%-0.4% of Ni, 1.0%-1.5% of Cr, 0.5%-0.8% of Mo, 1.2%-1.6% of Cu, 0.06%-0.20% of V, 0.01%-0.04% of Re and the balance impurity Fe. It is achieved that the yield strength of the formed process steel is greater than or equal to 550 MPa, the tensile strength is greater than or equal to 620 MPa, and the impact energy generated when the temperature is minus 60 DEG C is greater than or equal to 100 J.
Description
technical field [0001] The invention belongs to the technical field of thermomechanical control technology, and in particular relates to a 550MPa non-water-cooled thermomechanical control technology steel and a production method thereof. Background technique [0002] TMCP (Thermo Mechanical Control Process: thermomechanical control process) is in the process of hot rolling, on the basis of controlling the heating temperature, rolling temperature and rolling reduction (Control Rolling), and then controlling cooling and accelerated cooling ( Accelerated Cooling) technology general term. TMCP technology is mainly achieved by combining various methods such as refining austenite grains, controlled rolling and controlled cooling. It can produce high-strength steel without adding too many alloy elements and without subsequent complicated heat treatment conditions. High-toughness steel is a low-cost, low-energy, high-efficiency production process. [0003] However, the traditional...
Claims
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IPC IPC(8): C22C38/46C21D8/02
Inventor 尹云洋付勇涛方芳严翔杨治争朱丛茂郭斌官计生陈玮
Owner 武汉钢铁有限公司