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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2013.6
- 수록면
- 66 - 75 (10page)
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초록· 키워드
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In this study, the effect of coating thickness(20㎛ and 30㎛) on microstructure and tensile properties in Yb:YAG disk laser welds of Al-Si-coated boron steel (1.2mmt) was investigated. In the case of as welds, the quantity of ferrite was found to be higher in base metal than that in HAZ (Heat Affected Zone) and fusion zone, indicating, fracture occurrs in base metal, and the fracture position is unrelated to the coating thickness. Furthermore, yield strength, tensile strength of base metal and welded specimens showed similar behavior whereas elongation was decreased. On the other hand, base metal and HAZ showed existence of martensite after heat treatment, the fusion zone indicated the presence of full ferrite or austenite and ferrite during heat treatment (900℃, 5min), After water cooling, austenite was transformed to martensite, and the quantity of ferrite in fusion zone was higher as compared with in base metal, resulting in sharply decrease of yield strength, tensile strength and elongation, which leads to fracture occured at fusion zone. In particular, results showed that because the concentration of Al was higher in 30㎛ coating layer specimen than that of 20um coating specimen, after heat treatment, producing a higher quantity of ferrite was higher after heat treatment in the fusion zone; howevers, it leads to a lower tensile property.
목차
Abstract
1. 서론
2. 실험 방법
3. 실험결과 및 고찰
4. 결론
참고문헌
참고문헌 (17)
참고문헌 신청
1. [학술지(정기간행물)] - Senuma, Takehide / 2001 / Physical Metallurgy of Modern High Strength Steel Sheets / ISIJ Int 41 : 520 ~
2. [학술지(정기간행물)] - T. Mega / 2004 / Ultra High-Strength Steel Sheets for Bodies, Reinforcement Parts, and Seat Frame Parts of Automobile —.Ultra High-Strength Steel Sheets Leading to Great Improvement in Crash- worthiness— / JFE Tech. Report 4 : 38 ~
3. [학술대회논문] - L. Vaissiere / 2002 / Development of pre-coated boron steel for applications on PSA peugeotcitroën and RENAULT bodies in white / Int. body eng. conf. & exhibition : 909 ~
4. [학술대회논문] - L. G. Aranda / 2003 / Hot stamping of quenchable steels : material data and process simulations / IDDRG, Conf. Proc : 155 ~ 164
5. [학술대회논문] - R. Kolleck / 2004 / Manufacturing methods for safety and structural body parts for lightweight body design / IDDRG, Conf. Proc : 167 ~ 173
2. [학술지(정기간행물)] - T. Mega / 2004 / Ultra High-Strength Steel Sheets for Bodies, Reinforcement Parts, and Seat Frame Parts of Automobile —.Ultra High-Strength Steel Sheets Leading to Great Improvement in Crash- worthiness— / JFE Tech. Report 4 : 38 ~
3. [학술대회논문] - L. Vaissiere / 2002 / Development of pre-coated boron steel for applications on PSA peugeotcitroën and RENAULT bodies in white / Int. body eng. conf. & exhibition : 909 ~
4. [학술대회논문] - L. G. Aranda / 2003 / Hot stamping of quenchable steels : material data and process simulations / IDDRG, Conf. Proc : 155 ~ 164
5. [학술대회논문] - R. Kolleck / 2004 / Manufacturing methods for safety and structural body parts for lightweight body design / IDDRG, Conf. Proc : 167 ~ 173
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UCI(KEPA) : I410-ECN-0101-2014-580-003329204