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金鴻遇,徐錫寬 충주대학교 산업대학원 2002 大學院論文輯 Vol.3 No.-
Technological trends for cutting and working is developed towards high speed high performance and high accuracy and materials for this purpose are asked good wear resistance toughness high temperature stabilization. To possess above mentioned properties; ceramics coated chemical vapor deposition(CVD) process is studied on the high-speed tool and high alloyed steel tool. recently, chemical vapor deposition assisted with Plasma and or Laser as a sub-energy source is studied to reduce the high reaction temperature. plasma enhanced chemical deposition have a strong advantage and it could be depose below 550℃ and control the physical properties by controlling the activated ion and radical energy. In this study, substrates(STD11 and SKH9)were coated with TiC, RiN film using R.F. PECVD process. The purpose of applying the surface coatings was to improve tool performance in terms of tool life and work quality. In addition, to improve the adhesion of TiC, TiN depositin nitride and Ti interlayer were deposited on the substrates. The result indicate that TiC, TiN coatings improve wear resistance by the adhesion of TiC, TiN films was improved.
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전북지역(全北地域) 산업근로자(産業勤勞者)의 산업재해(産業災害)에 관(關)한 조사연구(調査硏究)
황인담,박영수,서석관,Hwang, In-Dam,Park, Young-Soo,Suh, Suk-Kwon 대한예방의학회 1981 예방의학회지 Vol.14 No.1
Of 2,740 industries in Jeonbug area which are covered by industrial insurance policy, 462 facilities which the accidents related to industry occured during the year of 1979 were studied. and the results are summarized as follows: 1. The accidents related to industry occured in 462 industries of the total 2,740 industrial facilities in Jeonbug area as of 1979. 2. The incidence rate of accident per 1,000 workers was 34.3 (49.2 in male workers and 12.8 in female workers), the frequency rate of the total industries in jeonbug area was 13.36, and severity rate was 1.3. 3. The frequency rates and severity rates by type of industry in study area were quite different to compare with those of national rates. 4. The incidence rate of construction industry was 223.6 per 1,000 workers, and that of transportation-communication industries were 78.6. 5. The proportion of industrial accidents of $20{\sim}24$ age group was 22.1 per cent of the total accidents, and the proportions decreased according to age increase. 6. The incidence rate in the industry having less than 49 workers was 20.6 per 1,000 workers, that of industry with $50{\sim]99$ workers was 26.7, that of industry with $100{\sim}199$ was 51.9, that of industry with $200{\sim}499$ was 80.2 and that of with more than 500 worker was 40.7. 7. The accidents which occured in the workers with experience of less than one year was 69.4 per cent of the total accidents, otherwise, the longer the workers have worked the less accident they have. 8. The most accidents occured in tile shift between 10 to 12 o'clock, and 16 to 18 hour 9. The primary causes of the industrial accidents were found to be collisions, machinery falling objects and falls. 10. The site of injury by type of industry were quite different, and the major site of injury was finger. 11. The laceration and open injuries of the accidents related to industry were 37.2 per cent of the total cases, and fractures or dislocations were 23.5 per cent, and contusions were 6.5 per cent. 12. Death rate of industrial accident was 5.0 per 10,000 workers, and those of industry were 47.6 in transportation, 42.8 in construction industry, 24.4 in mine industry, and 2.0 in manufacturing industry.
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