著者

阪上 隆英

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.72, no.4, pp.251-255, 2003-06-05 (Released:2011-08-05)

参考文献数

5

被引用文献数

1 1

著者

濱田 昌彦

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.80, no.2, pp.180-187, 2011 (Released:2013-02-21)

参考文献数

42

著者

瀬渡 賢

出版者

JAPAN WELDING SOCIETY

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.72, no.7, pp.575-578, 2003

著者

三上 博

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.17, no.10-12, pp.373-374, 1948 (Released:2009-06-12)

著者

寺井 精英

出版者

社団法人溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.57, no.1, pp.8-16, 1988-01-05

著者

岡田 実 西口 公之 丸尾 大 谷 隆之

出版者

社団法人溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.36, no.1, pp.44-52, 1967-01-25

---

An excellent dense and oxide free coating of Ni-Cr-B-Si alloy was obtained by the shielded plasma spraying method as shown in the previous report. The present report describes certain effects of spraying conditions, such as spraying atmosphere and preheating of substrate surface, on the quality of coating. And the application of shield nozzle and its effect are also investigated in details. Usually, plasma spraying of Ni-Cr-B-Si alloy in the air makes a porous and oxide inclusive deposit, even with use of pure argon plasma jet. It may be seen that some of these defects were caused by the oxidation of droplets in spraying. Air contamination into the plasma flame up to 90% was detected in the quantitative gas analysis of plasma flame at a distance of 90mm from the torch. Spraying in argon atmosphere gave a somewhat better coated layer compared with the spraying in the air, but is far from being perfect. These results suggest that the protection of particle and substrate from oxidation is necessary but is insufficient for obtaining perfect coating. Furthermore, thermal problems in a process should be considered at the same time. As the result of atmospheric, thermal and kinetic considerations in the processes, shield spraying method has been proposed. In the shielded spraying of this alloy, the preheating of substrate has great effect on the bond between the coated layer and the substrate. For the specimen which is shield-sprayed without any preheating, a little amount of porosity was observed at the boundary. But almost perfeet metallurgical bonding is accomplished with local preheating (300℃) of substrate surface. As for the application of shield nozzle, a series of experiments were carried out to analize the effect of nozzle. Results as follows; (1) Spraying atmosphere is kept perfectly inert. (2) Shield nozzle has an effect of raising the heat transfer from the plasma flame to the particles and substrate, since the contamination of cold gas is completely shout off. (3) Application of shield nozzle makes it easy to preheat the substrate surface with a high effluent of heat flux. (4) Temperature and velocity of particle rise as a result of increase of thermal efficiency and velocity of plasma flame.

著者

岡田 実 西口 公之 丸尾 大 谷 隆之

出版者

JAPAN WELDING SOCIETY

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.36, no.1, pp.44-52, 1967

---

An excellent dense and oxide free coating of Ni-Cr-B-Si alloy was obtained by the shielded plasma spraying method as shown in the previous report. The present report describes certain effects of spraying conditions, such as spraying atmosphere and preheating of substrate surface, on the quality of coating. And the application of shield nozzle and its effect are also investigated in details.<BR>Usually, plasma spraying of Ni-Cr-B-Si alloy in the air makes a porous and oxide inclusive deposit, even with use of pure argon plasma jet. It may be seen that some of these defects were caused by the oxidation of droplets in spraying. Air contamination into the plasma flame up to 90% was detected in the quantitative gas analysis of plasma flame at a distance of 90 mm from the torch.<BR>Spraying in argon atmosphere gave a somewhat better coated layer compared with the spraying in the air, but is far from being perfect. These results suggest that the protection of particle and substrate from oxidation is necessary but is insufficient for obtaining perfect coating. Furthermore, thermal problems in a process should be considered at the same time. As the result of atmospheric, thermal and kinetic considerations in the processes, shield spraying method has been proposed.<BR>In the shielded spraying of this alloy, the preheating of substrate has great effect on the bond between the coated layer and the substrate. For the specimen which is shield-sprayed without any preheating, a little amount of porosity was observed at the boundary. But almost perfect metallurgical bonding is accomplished with local preheating (300°C) of substrate surface.<BR>As for the application of shield nozzle, a series of experiments were carried out to analize the effect of nozzle. Results as follows;<BR>(1) Spraying atmosphere is kept perfectly inert.<BR>(2) Shield nozzle has an effect of raising the heat transfer from the plasma flame to the particles and substrate, since the contamination of cold gas is completely shout off.<BR>(3) Application of shield nozzle makes it easy to preheat the substrate surface with a high effluent of heat flux.<BR>(4) Temperature and velocity of particle rise as a result of increase of thermal efficiency and velocity of plasma flame.

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.60, no.3, pp.170-181, 1991-04-05 (Released:2011-08-05)

著者

岩田 剛治

出版者

社団法人溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.65, no.3, pp.250-251, 1996-04-05

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.22, no.3, pp.101-102, 1953 (Released:2009-06-12)

著者

川畑 友弥

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.84, no.1, pp.75-82, 2015 (Released:2016-01-10)

参考文献数

61

被引用文献数

1

著者

久保田 耕平 工藤 松一 坂下 積 長瀬 隆夫

出版者

社団法人溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.55, no.1, pp.35-40, 1986-01-05

著者

ボンドロウシュ ペトル

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.79, no.4, pp.299-303, 2010 (Released:2014-02-20)

参考文献数

4

著者

清水 政司

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.64, no.3, pp.178-182, 1995-04-05 (Released:2011-08-05)

参考文献数

3

著者

大倉 一郎

出版者

社団法人溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.72, no.1, pp.53-56, 2003-01-05

被引用文献数

6

著者

稲垣 道夫 岡田 明 小林 志希男 木村 勝美 福原 煕明 松本 庄次郎 青木 孝夫 中野 恵司 兼古 光行

出版者

社団法人溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.51, no.9, pp.775-783, 1982-09-05

被引用文献数

1

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For purpose to obtain the fundamental data of securing the reliability of welded joints, the establishment of welding control technique to make weld defects of arc welded joints in the natural condition, the design and trial making of ultrasonic point focussed probe in order to detect quantitatively planar defects and their application were carried out. And also, effects of the lack of penetration with one side welding of SM50B steels on the fatigue test results of welded joints were investigated. The main results are as follows; (1) Relation between the lack of penetration and welding condition in gas metal arc (GMA) welding were made clear. (2) The point focusing angle probe using spherical tansduser in ultrasonic detecting method was applied to the measurement of the size of lack of penetration. In case that the root face of butt welded joint was gas cut, the detecting accuracy was about±0.5mm. However, in case that there were blow-holes or some weld defects on the way of passing of ultrasonic beam or near the root, the size of planar defect was often mistaken. And also, in case that the root face was closely attached by welding, the detection of lack of penetration was often difficult. (3) The uniaxial stress fatigue strength of arc welded joints for SM50B steels which have the lack of penetration of about 2&acd;4mm in depth, without reinforcement and finished surface, was extremely lower than that of base metal and welded joints which have full penetration, without reinforcement and finished surface And the fatigue strength of arc welded joints with reinforcement showed the intermediate values between that of base metal or welded joints which have without reinforcement and finished surface and that of welded joint which have the lack of penetration of about 2&acd;4mm in depth, lowered fairly in comparison with that of base metal. These test results were discussed with non-linear fracture mechanics, consequently, the fatigue limits of welded joints are evaluated with effective notch depth as a whole.

著者

河村 敏一

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.58, no.7, pp.472-473, 1989-10-05 (Released:2011-08-05)

著者

奥川 淳志

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.60, no.8, pp.651-655, 1991-12-05 (Released:2011-08-05)

著者

三木 千壽

出版者

一般社団法人 溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.68, no.1, pp.31-37, 1999-01-05 (Released:2011-08-05)

参考文献数

7

被引用文献数

1

著者

山口 泰弘

出版者

社団法人溶接学会

雑誌

溶接学会誌 (ISSN:00214787)

巻号頁・発行日

vol.64, no.8, pp.602-606, 1995-12-05

被引用文献数

2 1