巻号一覧
37 巻, 5 号
選択された号の論文の7件中1～7を表示しています
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1968 年 37 巻 5 号 p. 403-472
発行日: 1968/05/25
公開日: 2011/08/05
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枡田 吉郎1968 年 37 巻 5 号 p. 473-479
発行日: 1968/05/25
公開日: 2011/08/05
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飯田 国広1968 年 37 巻 5 号 p. 480-493
発行日: 1968/05/25
公開日: 2011/08/05
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奥村 敏恵, 堀川 浩甫1968 年 37 巻 5 号 p. 494-501
発行日: 1968/05/25
公開日: 2011/08/05
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竹内 和之, 朝田 洋雄1968 年 37 巻 5 号 p. 502-508
発行日: 1968/05/25
公開日: 2011/08/05
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中村 孝, 浜崎 正信1968 年 37 巻 5 号 p. 509-512
発行日: 1968/05/25
公開日: 2011/08/05
ジャーナル フリーIn spot welding, it has been believed that the hydraulic system for electrode force has less good performance than the pneumatic system, because the former has poor response of electrode and may cause expulsion on account of the non-compressibility or weaken the strength of spot weld through the increased electrode force because of restriction of electrode movement which results from the expansion of materials. However, it has been found that expulsion does not occur and the electrode force does not increase so much because it is absorbed by high pressure rubber hose as the result of its expansion.
It has been also found that even in the hydraulic system the weld can be made satisfactorily without any troubles in mild steel and aluminum spot welding..抄録全体を表示PDF形式でダウンロード (247K) -
René 62の溶接性岡田 実, 井川 博, 新 成夫, 中尾 嘉邦, 大重 広明1968 年 37 巻 5 号 p. 513-522
発行日: 1968/05/25
公開日: 2011/08/05
ジャーナル フリーNi-base heat resisting super alloys have been used for conponents of welded stuructures. However, most of Ni-base alloys are unweldable. And there are many reports on the weld cracking of such alloys.
It is said that René 62 is weldable, in addition, it possesses favourable elevated temperature properties. Fundamental properties (including weldability) were investigated on Rene 62 and the following results were obtained.
(1) Precipitating phases in René 62 are γ' phase {Ni3 (Al, Ti, Nb)} and Laves phase {(Fe, Cr)2 (Mo, Nb, Ti)}, and age hardening is caused by precipitation and growth of γ' phase.
(2) Short time tensile strength of aged Rene 62 is approx. 100 kg/mm2 at room temperature and approx. 80 kg/mm2 at 750°C.
(3) As the result of bead-on-plate test on solution-treated René 62, the H.A.Z., where maximum heated temperature is in the region of 850-900°C, is hardened by fine precipitation of γ' phase. However, hardening is not so large as that in high strength steels.
(4) Welding of 7 mm thick Rene was made by Tig method. No weld cracking was observed, and the joint efficiency was very good.
(5) In Ni-Al-Nb alloys shown in Table 2, Nb promotes the precipitation of γ' phase.
(6) When AI content of René 62 is increased to 4.15%, weld cracking is formed in bead-on-plate test on as-cast materials. Decrease in ductility of matrix and decrease in γ' phase dissolved range at elevated temperature by increasing Al content are considered to increase the weld crack sensibility.
(7) Therefore, in Rene 62, a low level of Al content is considered to be one of the important factors for good weldability.抄録全体を表示PDF形式でダウンロード (9459K)
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