A kind of ATM automatic teller machine high-strength steel plate and manufacturing method thereof
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A technology for ATMs and high-strength steel plates, applied in the field of metal materials, can solve problems such as low yield strength, poor low-temperature toughness of steel plates, and affect weldability, etc., and achieve strong weldability, good cold-bending formability, and small internal stress Effect
Active Publication Date: 2021-02-23
ANGANG STEEL CO LTD
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The C content of the steel plate of this invention is too high, which affects the weldability, and the low temperature toughness of the steel plate is poor, and the yield strength is low
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[0042] Below by embodiment the present invention will be further described.
[0043] In the embodiment of the present invention, smelting, continuous casting, rolling, continuous annealing, and leveling are carried out according to the component ratio of the technical solution. The composition of the steel of the embodiment of the present invention is shown in Table 1. The main technological parameters of the steel of the embodiment of the present invention are shown in Table 2. The performance of the steel of the embodiment of the present invention is shown in Table 3.
[0044] Table 1 Composition (wt %) of the embodiment steel of the present invention
[0045] C Si mn P S als Nb Ti Mo Cr Ceq example 1 0.032 0.4 1.36 0.018 0.002 0.046 0.061 0.128 0.13 0.54 0.40 Example 2 0.078 0.38 0.83 0.015 0.002 0.049 0.64 0.139 0.48 0.21 0.38 Example 3 0.031 0.16 1.69 0.016 0.004 0.044 0.44 0.159 0.15 0.23 0.40 ...
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Abstract
The invention provides a high-strength steel plate for an ATM automatic teller machine and a manufacturing method thereof. The composition of the steel plate is as follows by weight percentage: C: 0.03%-0.08%, Si: 0.1%-0.40%, Mn: 0.8%-1.7% , Cr: 0.20% ~ 0.60%, Nb: 0.030% ~ 0.065%, Ti: 0.080% ~ 0.160%, Mo: 0.10% ~ 0.50%, Als: 0.33% ~ 0.49%, N≤0.0070%, impurity elements P≤ 0.018% and S≤0.003%, Ceq<0.4; the balance is Fe and unavoidable impurities; the manufacturing method includes smelting, continuous casting, slab heating, rolling and cooling processes; the steel plate manufactured by the technical solution of the present invention has good Excellent low temperature toughness, able to serve in the severe cold environment in the north, strong weldability of the steel plate, good cold bending formability, excellent flatness, flatness less than or equal to 2mm / m, small internal stress of the steel plate, After shearing, there is no obvious warpage, camber, twist and other poor shape.
Description
technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a high-strength steel plate with a yield strength of 700 MPa used in cash deposit boxes of bank automatic teller machines and a manufacturing method thereof. Background technique [0002] ATMs are gradually becoming popular in cities, towns, and even remote areas, which brings great convenience to people's work and life, but puts forward higher requirements for the safety of ATMs, especially the resistance of cash deposit boxes of ATMs. Destruction is related to the safety of cash in ATMs. At present, most ATM cash deposit boxes in China are made of steel plates with a tensile strength of no more than 500MPa, and a few are made of steel plates with a tensile strength of 600-650MPa. With the popularity of ATMs in rural and remote areas, the steel used for deposit boxes is also developing towards higher strength. [0003] Carbon 0.09-0.20%; Silicon 0.10-0.60%; Manganese ...
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