간행물

한국열처리공학회> 열처리공학회지

열처리공학회지 update

Journal of the Korean Society for Heat Treatment

  • : 한국열처리공학회
  • : 공학분야  >  금속공학
  • : KCI후보
  • :
  • : 연속간행물
  • : 격월
  • : 1225-1070
  • : 2508-4046
  • :

수록정보
32권2호(2019) |수록논문 수 : 7
간행물 제목
34권4호(2021년 07월) 수록논문
최근 권호 논문
| | | |

KCI후보

1태양복사열 내부전도 성능향상을 위한 탄소 나노구조체 흑체코팅 열처리 효과연구

저자 : 김대원 ( Dae Weon Kim ) , 장성민 ( Seong Min Jang ) , 이두희 ( Du Hui Lee ) , 박준이 ( June Yi Park ) , 김영배 ( Young Bae Kim )

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 34권 4호 발행 연도 : 2021 페이지 : pp. 159-164 (6 pages)

다운로드

(기관인증 필요)

초록보기

The Improvement of thermal performance using heat treatment of carbon nanotubes coated on the copper heat sink to take the radiation energy from solar ray for the energy harvesting in earth orbit. Using the additive coating of purified CNT for the increase of specific area and development of thermal conductive capacity, the performance of heat transfer is improved about 0.181 K/W while applying the power of 22 W under temperature of 3.98℃. Coating of purified CNT shows increase of area and volume of thermal layer however it led the partial thermal resistance.
(Received May 28, 2021; Revised June 4, 2021; Accepted June 9, 2021)

KCI후보

2텅스텐아크용접에 의한 Zirconium의 동종 및 이종용접 특성 분석

저자 : 김진영 ( Jin Yeong Kim ) , 황효운 ( Hyo-woon Hwang ) , 이대현 ( Dae Hyun Lee ) , 이재관 ( Jae Gwan Lee ) , 이동근 ( Dong-geun Lee )

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 34권 4호 발행 연도 : 2021 페이지 : pp. 165-170 (6 pages)

다운로드

(기관인증 필요)

초록보기

Zirconium has excellent mechanical strength and high heat resistance and excellent corrosion resistance, and it is very important to study zirconium's dissimilar welding properties since it can be used in various applications under harsh environments. Similar welding of pure zirconium and dissimilar metal welding of pure zirconium and pure titanium were performed by TIG welding, and the welding properties were studied in association with microstructural and mechanical properties. In the Zr/Zr welded specimen, sound FZ and HAZ regions showed a basketweave microstructure composed of plate α phase. FZ region of Zr/Ti dissimilar welded specimen exhibited a maximum hardness value of 354.8 Hv, which is about three times higher than that of Ti base metal, due to the precipitation of very fine metastable ω and α phases in the beta matrix. In addition, due to the microstructural continuity in the FZ and HAZ regions, excellent elongation property of 21% was exhibited.
(Received June 3, 2021; Revised June 18, 2021; Accepted June 22, 2021)

KCI후보

3열간압연으로 제조된 STS 304L/A516-70N과 STS 316L/A516-70N 클래드재들의 미세조직에 대한 비교 연구

저자 : 진주찬 , 조수철 , 심호섭 , 이영국

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 34권 4호 발행 연도 : 2021 페이지 : pp. 171-178 (8 pages)

다운로드

(기관인증 필요)

초록보기

In the present study, we comparatively investigated the microstructures of two hot-rolled stainless steel clad plates; STS 304L - low carbon steel A516-70N and STS 316L - A516-70N. The STS 304L/A516-70N clad plate (Clad_304L_Ni) had a Ni-interlayer between stainless steel and carbon steel and a 90 μm thick deformation band of unrecrystallized austenite grains on the stainless steel. The STS 316L/A516-70N clad plate (Clad_316L) had no interlayer and almost fully recrystallized austenite grains. Clad_304L_Ni exhibited the thinner a decarburized layer in carbon steel and a total carburized layer in stainless steel than Clad_316L. However, a severely carburized layer in stainless steel was thicker for Clad_304L_Ni than Clad_316L. Hardness profiles near the interface of clad plates matched well with microstructures at locations where the hardness values were measured.
(Received June 22, 2021; Revised June 30, 2021; Accepted July 6, 2021)

KCI후보

4극초고강도 이차경화형 마르텐사이트강의 기계적성질에 미치는 오스포밍 공정의 영향

저자 : 김수빈 ( S. B. Kim ) , 원윤정 ( Y. J. Won ) , 송영범 ( Y. B. Song ) , 조기섭 ( K. S. Cho )

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 34권 4호 발행 연도 : 2021 페이지 : pp. 179-184 (6 pages)

다운로드

(기관인증 필요)

초록보기

Two types of secondary hardening martensitic steels, 10Co-14Ni and 6Co-5Ni, were produced by vacuum induction melting to investigate the effect of ausforming process on mechanical properties. According to the results of present study, the alloy samples ausformed at low temperature indicated a rather low hardness level in overall aging time despite the refinement of martensite lath width. As the result can closely be related with the presence of primary carbides precipitated within the initial austenite matrix, we confirmed that, in ultrahigh strength secondary hardening martensitic alloy steels, the ausforming process can rather limit the degree of secondary hardening during the subsequent aging treatment.
(Received July 8, 2021; Revised July 15, 2021; Accepted July 21, 2021)

KCI후보

5금형 냉각과 압출 속도가 7075 합금 압출에 미치는 영향에 대한 현상학적 분석

저자 : 성상규 ( S. G. Seong ) , 강현준 ( H. J. Kang ) , 이상용 ( S. Y. Lee )

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 34권 4호 발행 연도 : 2021 페이지 : pp. 185-190 (6 pages)

다운로드

(기관인증 필요)

초록보기

The extrusion experiments using the 7075 aluminum billet have been performed to investigate the effects of die cooling and ram speed on the occurrence of surface defects on the extrudate. The purpose of die cooling was to suppress overheating of the extrudate at the moment of extrusion. In the present die cooling system, liquid nitrogen has been injected in to the die and sprayed to the surface of extrudate. Ram speed was either kept or varied in the range of 1.1~1.7 mm/sec. throughout one extrusion shot to check the occurrence of surface defects. Every extrusion started at a ram speed of 1.25 mm/sec. The temperature of extrudate was measured using a laser thermometer. The 7075 billet of 180 mm in diameter and 550 mm in length was preheated at 390oC and extruded to get a single plate of 8000 mm in length, 150 mm in width and 10 mm in thickness. Each extrudate was checked by eye to find the surface defects. The microstructures were obtained in the specimen cut from each corner of the extrudate using the EBSD micrographs.
(Received July 9, 2021; Revised July 16, 2021; Accepted July 22, 2021)

KCI후보

6제 7장 열처리에 의한 표면처리

저자 : 손명진

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 34권 4호 발행 연도 : 2021 페이지 : pp. 191-198 (8 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기
1
권호별 보기
같은 권호 수록 논문
| | | | 다운로드

KCI후보

1A 6061 합금의 기계적 특성에 미치는 2단시효의 영향

저자 : 이보배 ( Bo-bae Lee ) , 임항준 ( Hang-joon Im ) , 정걸채 ( Geol-chae Jeong )

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 32권 2호 발행 연도 : 2019 페이지 : pp. 57-60 (4 pages)

다운로드

(기관인증 필요)

초록보기

The impact of two-step treatment on the mechanical properties of the 6061 Al alloy was investigated by testing the hardness and electrical conductance values. After two-step aging treatment, the hardness and electrical conductivity of the alloy was increased, and if the first aging treatment temperature was lower than the secondary aging treatment temperature, both the hardness and the electrical conductivity were not increased. The higher the temperature of the first aging treatment, the higher the hardness. The temperature of the first aging treatment is 175℃, 150℃, 120℃, and the second is 175℃ and 120℃.
(Received January 15, 2019; Revised January 17, 2019; Accepted January 21, 2019)

KCI후보

2Fe-20Mn-12Cr-3Ni-3Si 합금의 인장성질에 미치는 가공열처리의 영향

저자 : 한현성 ( H. S. Han ) , 강창룡 ( C. Y. Kang )

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 32권 2호 발행 연도 : 2019 페이지 : pp. 61-67 (7 pages)

다운로드

(기관인증 필요)

초록보기

This study was carried out to investigate the effect of thermo-mechanical treatment on the tensile properties of Fe-20Mn-12Cr-3Ni-3Si alloy with deformation induced martensite transformation. α' and ε-martensite, dislocation, stacking fault were formed, and grain size was refined by thermo-mechanical treatment. With the increasing cycle number of thermo-mechanical treatment, volume fraction of ε and α'-martensite, dislocation, stacking fault were increased, and grain size decreased. In 5-cycle number thermo-mechanical treated specimens, more than 10% of the volume fraction of ε-martensite and less than 3% of the volume fraction of α'-martensite were attained. Tensile strength was increased and elongation was decreased with the increasing cycle number of thermo-mechanical treatment. Tensile properties of thermo-mechanical treated alloy with deformation induced martensite transformation was affected to formation of martensite by thermo-mechanical treatment, but was large affected to increasing of dislocation and grain refining.
(Received January 17, 2019; Revised February 15, 2019; Accepted February 22, 2019)

KCI후보

3타이타늄 중공마더빌렛 주조재의 열처리공정 최적화 연구

저자 : 윤창석 ( Chang-suk Youn ) , 박양균 ( Yang-kyun Park ) , 이형욱 ( Hyung-wook Lee ) , 이동근 ( Dong-geun Lee )

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 32권 2호 발행 연도 : 2019 페이지 : pp. 68-73 (6 pages)

다운로드

(기관인증 필요)

초록보기

α-titanium alloy has a relatively low heat treatment characteristic and it is mainly subjected to heat treatment for residual stress, recovery or dynamic recrystallization. In this study, commercially pure titanium hollow castings was fabricated by gravity casting. Heat treatments were carried out at 750℃, 850℃ and 950℃ to investigate the effect of post-heat treatment on microstructure and mechanical properties. Beta-transus temperature (Tβ) was about 913℃, and equiaxed microstructure was shown at temperature below Tβ and lath-type microstructure at temperature above Tβ. Microstructure and mechanical properties did not show any significant difference in the direction of solidification for titanium hollow billet, so it can be seen that it was a well-made material for extrusion process. The optimum heat treatment condition of hollow billet castings for the seamless tube production was 850℃, 4 hr, FC, indicating a combination of equiaxed microstructure and appropriate mechanical properties.
(Received February 18, 2019; Revised March 7, 2019; Accepted March 14, 2019)

KCI후보

4열처리 온도에 따른 Zn2SnO4 박막의 특성

저자 : 신종언 ( Johngeon Shin ) , 조신호 ( Shinho Cho )

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 32권 2호 발행 연도 : 2019 페이지 : pp. 74-78 (5 pages)

다운로드

(기관인증 필요)

초록보기

Zn2SnO4 thin films were deposited on quartzs substrates by using radio-frequency magnetron sputtering system. Thermal treatments at various temperatures were performed to evaluate the effect of annealing temperatures on the properties of Zn2SnO4 thin films. Surface morphologies were examined by using field emission-scanning electron microscopy and showed that sizes of grains were slightly increased and grain boundaries were clear with increasing annealing temperatures. The deposited Zn2SnO4 thin films on quartzs substrates were amorphous structures and no distinguishable crystallographic changes were observed with variations of annealing temperatures. The optical transmittance was improved with increasing annealing temperatures and was over 90% in the wavelength region between 350 and 1100 nm at the annealing temperature of 600℃. The optical energy bandgaps, which derived from the absorbance of Zn2SnO4 thin films, were increased from 3.34 eV to 3.43 eV at the annealing temperatures of 450℃ and 600℃, respectively. As the annealing temperature was increased, the electron concentrations were decreased. The electron mobility was decreased and resistivity was increased with increasing annealing temperatures with exception of 450℃. These results indicate that heat treatments at higher annealing temperatures improve the optical and electrical properties of rf-sputtered Zn2SnO4 thin films.
(Received February 18, 2019; Revised March 14, 2019; Accepted March 15, 2019)

KCI후보

5Cu-Al 마찰용접 접합부 계면에서 열처리에 따른 금속간화합물 성장

저자 : 김기영 ( Ki-young Kim ) , 최인철 ( In-chul Choi ) , Kazuhiro Ito , 오명훈 ( Myung-hoon Oh )

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 32권 2호 발행 연도 : 2019 페이지 : pp. 79-85 (7 pages)

다운로드

(기관인증 필요)

초록보기

To investigate the influence of heat treatment on the growth intermetallic compounds (IMCs) at the joint interface of friction-welded Cu-Al, several heat treatments are performed at three different temperature with different times. The experiments reveal three different IMCs layers which are significantly influenced by atomic diffusion of Cu and Al with heat treatment conditions. Since the formation of these IMCs layers can affect mechanical properties of friction-welded Cu-Al interfaces, the relationship between the microstructure of IMCs layers and the tensile strength is analyzed according to heat treatment temperature and times.
(Received January 14, 2019; Revised March 6, 2019; Accepted March 22, 2019)

KCI후보

6제 4 장. 진공침탄 경화의 조건을 계산으로 구하는 방법

저자 : 손명진

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 32권 2호 발행 연도 : 2019 페이지 : pp. 86-91 (6 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기

KCI후보

7열처리 용어 해설(8)

저자 : 한국열처리공학회

발행기관 : 한국열처리공학회 간행물 : 열처리공학회지 32권 2호 발행 연도 : 2019 페이지 : pp. 92-94 (3 pages)

다운로드

(기관인증 필요)

키워드 보기
초록보기
1

내가 찾은 최근 검색어

최근 열람 자료

맞춤 논문

보관함

내 보관함
공유한 보관함

1:1문의

닫기