KR970048355A - Aging Evaluation Method of Hot Rolled Steel Sheet for Deep Processing - Google Patents

Aging Evaluation Method of Hot Rolled Steel Sheet for Deep Processing Download PDF

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Publication number
KR970048355A
KR970048355A KR1019950066254A KR19950066254A KR970048355A KR 970048355 A KR970048355 A KR 970048355A KR 1019950066254 A KR1019950066254 A KR 1019950066254A KR 19950066254 A KR19950066254 A KR 19950066254A KR 970048355 A KR970048355 A KR 970048355A
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South Korea
Prior art keywords
rolled steel
aging
steel sheet
hot
deep processing
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KR1019950066254A
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Korean (ko)
Inventor
박성호
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김종진
포항종합제철 주식회사
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Priority to KR1019950066254A priority Critical patent/KR970048355A/en
Publication of KR970048355A publication Critical patent/KR970048355A/en

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Abstract

본 발명은 심가공용 열연강판의 시효성 평가방법에 관한 것이며, 그 목적은 실제 발생되는 시효현상을 실험실적으로 평가하여 시효효과를 분석하고 소재의 사용기준을 정립하고자 함에 있다.The present invention relates to a method for evaluating the aging of hot-rolled steel sheet for deep processing, the object of the present invention is to evaluate the aging phenomenon actually generated experimentally to analyze the aging effect and to establish the use criteria of the material.

본 발명은 심가공용 열연강판의 재질 평가방법에 있어서, 실제 소재가 받은 열이역에 의거하여 이를 log(t)=B+A/T(여기서, t는 시효시간, T는 절대온도, A,B는 상수)으로부터 인공시효조건으로 환산하고, 환산된 인공시효조건별 가공시험을 행하여, 그에 따른 결과에 의해 인공시효조건의 기준값을 설정한 다음, 이를 역으로 자연시효에 해당되는 조건을 구하여 시효성을 판단하는 심가공용 열연강판의 시효성 평가방법에 관한 것을 그 기술적 요지로 한다.In the present invention, in the method for evaluating the material of hot-rolled steel sheet for deep processing, log (t) = B + A / T (where t is an aging time, T is an absolute temperature, A, B is converted into an artificial aging condition from the constant), and subjected to processing tests for the converted artificial aging conditions, the reference value of the artificial aging conditions is set according to the result, and vice versa. The technical gist of the method for evaluating the aging characteristics of hot rolled steel sheets for deep workings is to be evaluated.

Description

심가공용 열연강판의 시효성 평가방법Aging Evaluation Method of Hot Rolled Steel Sheet for Deep Processing

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 저탄소 열연강판에 있어 본 발명에 의해 계산된 등시효시간과 실측된 시효시간과의 관계를 비교한 그래프.1 is a graph comparing the relationship between the isoaging time calculated by the present invention and the measured aging time for low carbon hot rolled steel sheet.

Claims (4)

심가공용 열연강판의 재질평가방법에 있어서, 통상의 인장시험방법에 의해 상기 열연강판의 시효시간(t)을 일정온도(T)별로 구하는 단계: 상기 온도값과 시효시간 데이터로부터 하기식(1)에 의해 이들의 상관관계 상수(A,B)를 결정하는 단계;In the material evaluation method of the hot-rolled steel sheet for deep processing, the step of obtaining the aging time (t) of the hot-rolled steel sheet by a predetermined temperature (T) by a conventional tensile test method: the following formula (1) Determining their correlation constants (A, B) by means of; log(t)=B+A/Tlog (t) = B + A / T 이후, 시효성을 평가하고자 하는 열연강판의 인공시효 온도(T2)를 상기 식(1)에 대입하여 인공시효시간(t2)를 구하는 단계; 구해진 인공시효온도(T2)및 시간(t2)별로 상기 시효성을 평가하고자하는 열연강판에 대하여 확관능(STF)을 측정하는 단계; 상기에서 측정된 확관능이 일정값이하가 되는 경우의 인공시효온도(T2) 및 시간(t2)을 기준값으로 설정하는 단계; 및 상기 설정된 기준값에 비해 열연강판의 사용온도(T1)에 따른 자연시효시간(t1)을 판단함을 특징으로 하는 심가공용 열연강판의 시효성 평가방법.Subsequently, substituting the artificial aging temperature (T 2 ) of the hot-rolled steel sheet to be evaluated for aging to the formula (1) to obtain an artificial aging time (t 2 ); Measuring the expansion capacity (STF) of the hot rolled steel sheet for which the aging is to be evaluated for each obtained artificial aging temperature (T 2 ) and time (t 2 ); Setting the artificial aging temperature (T 2 ) and time (t 2 ) as the reference value when the measured expansion capacity is equal to or less than a predetermined value; And a natural aging time (t 1 ) according to the use temperature (T 1 ) of the hot rolled steel sheet compared to the set reference value. 제1항에 있어서, 상기 식(1)은The method of claim 1, wherein the formula (1) log(t)=-9.05+4254.2/Tlog (t) =-9.05 + 4254.2 / T 임을 특징으로 하는 심가공용 열연강판의 시효성 평가방법.Aging method of the hot-rolled steel sheet for deep processing characterized in that. 제1항 또는 제2항에 있어서, 상기 심가공용 열연강판은 중량%로, C≤0.2%, Mn≤1.5%, 나머지는 Fe 및 불가피한 불순원소를 함유하는 C-Mn계 압력용기용 열연강판 임을 특징으로 하는 심가공용 열연강판의 시효성 평가방법.According to claim 1 or 2, wherein the hot-rolled steel sheet for deep processing is by weight, C≤0.2%, Mn≤1.5%, the remainder is a hot-rolled steel sheet for C-Mn pressure vessel containing Fe and unavoidable impurities Aging method for evaluating the hot rolled steel sheet for deep processing. 제3항에 있어서, 상기 인공시효온도(T2) 및 시간(t2)의 기준값은 확관능이 13㎜ 이하로 되는 온도 및 시간으로 설정함을 특징으로 하는 심가공용 열연강판의 시효성 평가방법.The method according to claim 3, wherein the reference values of the artificial aging temperature (T 2 ) and time (t 2 ) are set to a temperature and time at which the expansion capacity is 13 mm or less. . ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950066254A 1995-12-29 1995-12-29 Aging Evaluation Method of Hot Rolled Steel Sheet for Deep Processing KR970048355A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113237776A (en) * 2021-05-31 2021-08-10 青岛中和聚氨酯材料有限公司 Polyurethane high-temperature illumination deformation detection device and detection method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113237776A (en) * 2021-05-31 2021-08-10 青岛中和聚氨酯材料有限公司 Polyurethane high-temperature illumination deformation detection device and detection method thereof

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