Precipitation Examination of δ, σ, and γ Phases using Modified Cr/Ni Equivalent Ratios during the Multipass Welding of Stainless Steels
Precipitation Examination of δ, σ, and γ Phases using Modified Cr/Ni Equivalent Ratios during the Multipass Welding of Stainless Steels
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DOI：
10.1007/s12540-009-0507-8
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发表时间：
2009-06-01
影响因子：
3.5
通讯作者：
Hsieh, Chih-Chun
中科院分区：
文献类型：
--
作者：
Lin, Dong-Yih;Hsieh, Chih-Chun
本研究的目的是探讨三角洲、西格马、和的降水趋势。在焊接异种钢（SUS 304 L和AISI 1017）后使用具有309 L填料的修改的Cr/Ni当量比同时添加0.25重量%的各种Si含量的相，0.45重量百分比，和0.65重量% AISI 309 LSi不锈钢在1200 ℃热轧2小时。d、s和。采用EDS对热轧态AISI 309 LSi及异种钢焊接试样进行了金相组织分析，并根据Hammer & Svensson公式计算了Cr-eq/Ni-eq比值。在本研究中，相和基体的Cr-eq/Ni-eq分别表示为[Cr-eq/Ni-eq]相和[Cr-eq/Ni-eq]基体。修正后的方程（[Cr-eq/Ni-eq]修正）等于[Cr-eq/ Ni-eq]相/[Cr-eq/ Nieq]基体，并用于考察材料和工艺对d，s和.阶段。结果表明，d，s和的Creq/ Nieq比。相位分别为2.557与1.304相近，大于3.143和1.229。
The purpose of this study is to discuss the precipitation tendencies of delta, sigma, and. phases using a modified Cr/Ni equivalent ratio with 309L filler after welding dissimilar steels (SUS 304L and AISI 1017) while adding various Si contents of 0.25 wt.%, 0.45 wt.%, and 0.65 wt.% and hot rolling in AISI 309LSi stainless steels at 1200 C for 2 h. The elemental compositions of d, s, and. phases were performed by EDS in as-hot-rolled AISI 309LSi as well as dissimilar welded samples, and the Cr-eq/Ni-eq ratios were calculated by Hammer & Svensson's equation. In this research, the Cr-eq/Ni-eq of phase and matrix were presented as [Cr-eq/Ni-eq] phase and [Cr-eq/Ni-eq] matrix, respectively. The modified equation ([Cr-eq/Ni-eq] modified) was equal to [Cr-eq/ Ni-eq] phase /[Cr-eq/ Nieq] matrix, and it was used to examine the effect of materials and processes in the d, s, and. phases. The results indicated the Creq/ Nieq ratios of the d, s, and. phases were 2.557 similar to 1.304, over 3.143, and 1.229, respectively.