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Hot-rolled steel plate for container with yield strength 750mpa and manufacturing method thereof

A technology of hot-rolled steel sheet and yield strength, which is applied in the field of hot-rolled steel sheet for containers with a yield strength of 750Mpa and its manufacturing field, can solve the problems of high production cost and easy formation of rust red scale, and achieve long service life and high strength performance. , the effect of high strength and elongation

Active Publication Date: 2019-07-19
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a hot-rolled steel plate for containers with a yield strength of 750Mpa and its manufacturing method, which solves the technical problems that the surface of the existing hot-rolled steel plate for containers with a yield strength of 750Mpa is easy to generate rusty red scale and the production cost is high

Method used

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  • Hot-rolled steel plate for container with yield strength 750mpa and manufacturing method thereof
  • Hot-rolled steel plate for container with yield strength 750mpa and manufacturing method thereof
  • Hot-rolled steel plate for container with yield strength 750mpa and manufacturing method thereof

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Embodiment Construction

[0049] In the following, the present invention will be further described in conjunction with Examples 1 to 3.

[0050] Table 1 shows the chemical composition (by weight percentage) of the steel in the example of the present invention, and the balance is Fe and unavoidable impurities.

[0051] Table 1 The chemical composition of the steel in the embodiment of the present invention, unit: weight percentage

[0052]

[0053] According to the requirements of the material composition design of the present invention, the molten iron is pre-desulfurized, the converter top and bottom composite blowing, the Ar blowing station (or LF furnace) ensures that the bottom blowing Ar stirring time is greater than 5 minutes, and the RH furnace performs fine adjustment of the composition and vacuum cycle degassing treatment , To ensure that the RH pure degassing time is greater than 15 minutes, and at the same time, feed an appropriate amount of calcium-iron wire, blow Ar protection throughout the proc...

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Abstract

The invention relates to a hot rolled steel plate for a container with yield strength of 750MPa and a manufacturing method thereof and solves the technical problem that rusty red scales are likely to be generated on the surface of the hot rolled steel plate for the container with yield strength of 750MPa and the production cost is high. The hot rolled steel plate for the container with yield strength of 750MPa provided by the invention comprises the chemical components in percentages by weight: 0.06-0.09% of C, 0.25-0.35% of Si, 1.65-1.75% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.050-0.070% of Nb, 0.085-0.095% of Ti, 0.0015-0.0045% of Ca, 0.02-0.005% of Alt and the balance of Fe and inevitable impurities. No rusty red scales are generated on the surface of the hot rolled steel plate provided by the invention, and the hot rolled steel plate is used for manufacturing panels and structural parts of containers.

Description

Technical field [0001] The invention relates to a steel plate for containers, in particular to a hot-rolled steel plate for a container with a yield strength of 750Mpa and a manufacturing method thereof. Background technique [0002] As an indispensable product of modern logistics, containers play an important role in today's economic development. With the fierce competition in the container industry, reducing the purchase cost of container steel is an inevitable requirement of container manufacturers; increasing the strength of container steel can reduce the weight of the container, and the reduction of the weight of the container can ensure that the internal volume remains unchanged. Therefore, trucks, trains and ships that carry containers can only load more containers, which is in line with the trend of green and environmental development in today's society. In addition, the shipping requirements of containers require the corrosion resistance of containers. Although the surfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/12C22C38/14C21D8/02
CPCC21D8/0226C21D8/0263C21D2211/001C21D2211/005C22C38/04C22C38/12C22C38/14
Inventor 殷胜万兰凤孙明军
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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