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Vol.36, No.10, 1614 ~ 1622, 1998
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| Title |
| Effects of P and S on the Solidification Cracking Sensitivity of the 16Cr-14Ni Austenitic Stainless Steels |
| 주유상 , 김선구 , 김지준 , 김용진 Yoo Sang Ju , Sun Koo Kim , Ji Joon Kim , Yong Jin Kim |
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| Abstract |
| Cracking sensitivity during solidification of the high-alloyed austenitic stainless steel was evaluated in terms of P and S. Gleeble test apparatus was made to measure the reduction area (RA) of austenitic non-magnetic (NM) steel. The solidification mode and micro-segregation were also investigated using the unidirectional solidification equipment. From the muti-regression analysis among the zero ductility temperature (ZDR), P and S, the following equation was obtained, ZDR(℃)=331[P wt.%]+1802[S wt.%)+43. It was found that the effect of S on the ZDR is more significant than P. It was confirmed that the solidification pathway of the NM steel is L→L+γ→γ and most of the elements such as P, S ,Ni, Mn and Si were segregated positively in the interdendritic regions. |
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