한국군사과학기술학회지 (Journal of the Korea Institute of Military Science and Technology)

  • 제22권3호
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  • Pages.299-310
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  • 2019
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  • 1598-9127(pISSN)
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  • 2636-0640(eISSN)
한국군사과학기술학회 (The Korea Institute of Military Science and Technology)
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장갑판재용 고경도 강판의 용접 기술동향

Welding Technical Trend of High Hardness Armour Steel for Combat Vehicle

  • 정영철 (창원대학교 메카트로닉스대학 기계공학부) ;
  • 김찬규 (창원대학교 메카트로닉스대학 기계공학부) ;
  • 이승준 (한화디펜스(주) 창원1사업장 체계/생산기술팀) ;
  • 정용문 (한화디펜스(주) 창원1사업장 체계/생산기술팀) ;
  • 박철수 (한화디펜스(주) 창원1사업장 체계/생산기술팀) ;
  • 이병석 (한화디펜스(주) 창원1사업장 체계/생산기술팀) ;
  • 박태원 (국방과학연구소 제4기술연구본부) ;
  • 김홍규 (국방과학연구소 제4기술연구본부) ;
  • 조영태 (창원대학교 메카트로닉스대학 기계공학부)
  • Jeong, Youngcheol (Dept. of Mechanical Engineering, College of Mechatronics, Changwon National University) ;
  • Kim, Chankyu (Dept. of Mechanical Engineering, College of Mechatronics, Changwon National University) ;
  • Lee, Seungjun (System/Manufacturing Engineering Team, Changwon Plant1, Hanwha Defense) ;
  • Jung, Yongmun (System/Manufacturing Engineering Team, Changwon Plant1, Hanwha Defense) ;
  • Park, Choulsoo (System/Manufacturing Engineering Team, Changwon Plant1, Hanwha Defense) ;
  • Lee, Byungsuk (System/Manufacturing Engineering Team, Changwon Plant1, Hanwha Defense) ;
  • Park, Taewon (The 4th Research and Development Institute, Agency for Defense Development) ;
  • Kim, Hongkyu (The 4th Research and Development Institute, Agency for Defense Development) ;
  • Cho, Young Tae (Dept. of Mechanical Engineering, College of Mechatronics, Changwon National University)
  • 투고 : 2019.02.28
  • 심사 : 2019.04.26
  • 발행 : 2019.06.05
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초록

Increase of combat capability through the lightweighting of vehicles has been internationally issued. One of the methods for lightening is applying high hardness armor(HHA) steel which is outstanding ballistic performance and protection performance compared to weight. Development of HHA steel is currently completed in America, United Kingdom, Australia and Germany. It is used for not only combat vehicle, but also various combat device. Korea is developing new material of HHA steel according to this trend. When such HHA steel is applied to structure, welding process is used for connection of the structure. Cracks from hydrogen embrittlement and cold cracking are easily generated in welds of HHA steel and it greatly affects the strength of all structure. Decrease of strength from welding defect is critical to combat capability. Therefore, welding process optimization is important for performing the role of structure. In this study, international welding technology is reviewed through scientific research paper and patent.

키워드

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Fig. 1. Combat vehicle trend according to nation

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Fig. 2. Area of weld in HHA steel[10]

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Fig. 3. Hardness distribution of HHA steel[10]

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Fig. 4. Amount of related paper according to nation

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Fig. 5. Type of crack in y groove specimens[10]

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Fig. 6. Optical micrographs of weld metal region: (a) SMAW with austenitic stainless material (b) FCAW with austenitic stainless material (c) SMAW with low hydrogen ferritic material (d) FCAW with low hydrogen ferritic material[19]

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Fig. 7. Form of weld according to welding consumable[20]

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Fig. 8. Schematic illustration of (a) FSW process and (b) FSW tool[22]

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Fig. 9. Process and welding bead of laser & arc hybrid system[31]

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Fig. 10. Picture of mechanical wire control in CMT

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Fig. 11. Picture of induction & arc hybrid system

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Fig. 12. Amount of patent according to nation

Table 1. Specification of high hardness steel according to major nation[5~8]

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Table 2. Major industry for HHA steel

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Table 3. Major patent related welding of HHA steel

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Table 4. Weld hardness according to process and materials

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