炭素鋼・低合金鋼の電子ビーム溶接における低温割れの研究 : 電子ビーム溶接法に関する研究(第1報)(昭和61年度春季全国大会論文発表講演論文)

概要

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The authors researched cold rcacking in electron beam (EB) welding by performing hardness and cracking tests on 28 different types of carbon and low-alloy steels. Based on the test results, the welding paramteer (P_<EBW>), a factor used to estimate the cold cracking in EB welding, has been determined. The conclusions are summarized as follows ;(1) The maximum Hardness Value (H_<Vmax>) of the EB weld can be estimated by equation (1).[numerical formula] where C : the carbon content of the material (wt%)(2) Restraint stress of EB weld can be estimated by equation (2)[numerical formula] where σ_w : restraint stress (MPa), R_F : restraint intensity (N/mm.mm)(3) The cold cracking in EB weld can be predicted by equation (3)[numerical formula] where H_<Vcr> : the critical hardness value of crack occurrence γ_f : restraint coefficient (N/mm^2・mm)(4) The welding parameter (P_<EBW>) can be determined by equation (4) [numerical formula] when Q≨13500 J/cm, without preheating ; P_<EBW>=0.475
社団法人溶接学会の論文
1986-02-05