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Manufacturing method of tensile strength 60Kg / mm² high tensile strength steel with excellent impact toughness of welding heat affected zone
Manufacturing method of tensile strength 60Kg / mm² high tensile strength steel with excellent impact toughness of welding heat affected zone
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机译：具有优异的焊接热影响区冲击韧性的抗拉强度为60Kg /mm²高抗拉强度钢的制造方法
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摘要
The present invention relates to a method of manufacturing high tensile steel suitable for crude oil storage tanks, pressure vessels or bridge structure materials, the object of which is the tensile strength of the welding heat affected zone toughness 60kg / k ㎡ even if the high heat input welding method is applied An object of the present invention is to provide a method for manufacturing high tensile steel. The present invention contains 0.04-0.08% by weight of carbon, and finish-rolled steel deoxidized with Ti at a temperature of 900 ° C or higher so that the Ti content is three times the oxygen content, and then directly quenched at a cooling rate of 10 ° C / sec or more. The technical gist of the present invention relates to a method for producing a tensile strength 60 kg / kmm 2 high tensile strength steel having excellent weld heat affected zone toughness, including the conventional method.
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