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김성오,최진일 대한금속재료학회(대한금속학회) 1988 대한금속·재료학회지 Vol.26 No.12
To study the effect of silicon additions on the boronized depth, hardness and wear of the boronized layer, an electro-boronizing on the substrate such as electrolytic iron, ferritic and austenitic stainless steel has been carried out at the current density of 0.5A/㎠ and in the temperature range of 800-1000℃ for 1-5 hours. the findings from the experiment are summarized as follows. 1) Increased boronize depth was obtained with increased addition of silicon. excess silicon addition, however, inhibited the buronizing due to the increased viscosity of electrolyte. 2) Deeper boronized layer was resulted with ferritic than austenitic stainless steel. the boronized depth of the both stainless steels, however, were only one-third that of the electrolytic iron. 3) Wear resistance of the substrates was improved markedly by boronizing, showing the best result in the ferritic followed by austenitic stain-less steel and electrolytic iron.
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1870년 대구부 각초동면 호적대장에 나타나는 호구출입 기록 분석
김성오 수선사학회 2024 사림 Vol.- No.90
The Joseon household register, a regional ledger encompassing all residents, was compiled every three years in a cycle known as “siknyeon,” providing a continuous record of regions and individual families over long periods. Research on the Joseon household register has been ongoing for a long time, and it has been revealed that households were registered according to the total population allocated to each region based on the government's population policy. This signifies that the registered households in the household register were “constructed and organized according to a certain intention.” This research focuses on the entry and exit of households, aiming to examine which households were removed and newly registered in successive “siknyeon” cycles. In this regard, a new record emerges in the Daegu-bu Gakchodongmyeon household register from 1870, which was not present in previous records. Located between households, this record indicates the removal of households from the register with notations like “移去” (migration) or “故” (death), providing a reason for their removal. This paper designates this record as “出戶竝記,” highlighting the need for examining “various records” that cannot be captured by the conventional standardized data in Joseon household register research.
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