巻号一覧
47 巻, 4 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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関口 晁, 竹内 宥公, 徳和 吉一1976 年 47 巻 4 号 p. 215-222
発行日: 1976/10/15
公開日: 2009/05/25
ジャーナル フリーThe austenitic manganese steel crossing was welded with an electrode of 16Mn-16Cr whose deposited metal was composed of γ and several per cent α. But the intergranular microfissures were found on the surface of the weld metal in several months after welding. Most of cracks were found in 1st and 2nd layer welded onto the manganese steel, whose weld metal changed into γ structure through dilution of base metal.
It was considered that the crack was stress corrosion crack due to residual stress and corrosive agent in atmosphere. The effective treatments to prevent the crack are:
(1) The groove face of the manganese base metal was first welded with ferritic metal such as 25Cr-4Ni as a buttering, and the weld metal was turned into α+γ. Then the remainder was welded with an electrode of 16Mn-16Cr.
(2) The welded zone was stress-relieved at the temperature less than 400°C.
(3) The welded zone was shot blasted.
These treatments were applied on the two sets of austenitic manganese crossing. Accordingly there have been no cracks for the past 6 years since it was practically used.抄録全体を表示PDF形式でダウンロード (6246K) -
加藤 哲男, 関口 晁, 川崎 成人, 草加 勝司1976 年 47 巻 4 号 p. 223-230
発行日: 1976/10/15
公開日: 2009/05/25
ジャーナル フリーAiming at manufacturing of filler metal for overlay welding, generally, produced in small quantity and various grades, by means of powder rolling a trial making of powder rolling equipment and an investigation of manufacturing conditions were made.
A new powder feeding method for keeping compacting rate constant was investigated.
Using relationship among density and thickness of green strip, rolling load and initial load (or initial roll gap), a controlling method for compacting a green strip of appointed characteristic could be obtained.
After welding test it was confirmed that a strip produced with only compaction and sintering was possible to be used as filler metal.抄録全体を表示PDF形式でダウンロード (403K) -
長谷川 和正, 渡辺 輝夫1976 年 47 巻 4 号 p. 231-237
発行日: 1976/10/15
公開日: 2009/05/25
ジャーナル フリーThe pressure weldability of tool steels by hot rolling are experimentally investigated and the effects of steel combinations and rolling conditions are discussed.
The effect of various steel combination can be demonstrated by the oxidation at high temperature and fragmentation of oxide film, deformation resistance ratio and diffusion of alloying elements.
The oxidation prevention by Al addition and availability of the insert layer by nickel plating have a large effect on the pressure weldability. The reduction rate necessary for the bonding can be obtained by behavior of oxide film and deformation behavior of components. The rolling temperature influences the pressure weldability according to influence to oxidation amount.
The influence of surface roughness is little.
The annealing after hot rolling have a large effects on the pressure weldability. At the welded interface C, Cr and Ni are mostly diffused and diffusion of other element is few.抄録全体を表示PDF形式でダウンロード (5277K) -
伊藤 哲朗, 阿部山 尚三, 中村 貞行1976 年 47 巻 4 号 p. 238-244
発行日: 1976/10/15
公開日: 2009/05/25
ジャーナル フリーAn investigation was made about relationship among drill life, cutting force and cutting temperature.
After several experiments and analyses there were obtained the underwritten conclusion.
(1) Between drill life L and cutting torgue T, there is such a logarithmic relationship as logL=k1-k2T. Accordingly, cutting torque can be used as a parameter for estimating drill life.
(2) Drilling temperature is in proportion to cutting torque and revolution while it is in inverse proportion to drill diameter.
(3) Drill life depends upon drilling temperature. From the result (2), it is possible to explain that the experimental fact that drill life L is related to cutting torque T.抄録全体を表示PDF形式でダウンロード (336K) -
加藤 哲男, 阿部山 尚三, 久田 建男1976 年 47 巻 4 号 p. 245-252
発行日: 1976/10/15
公開日: 2009/05/25
ジャーナル フリーAbout 316L sintered and afterwards forged stainless steels having 80-100 percent of full density, the influence of water-toughening, sintering atmosphere and addition of Copper and Tin upon density and corrosion resistance was studied. Results are summarized as follows:
(1) Linear shrinkage becomes smaller with Cu and Sn addition. When the sintering temperature is higher, appearance of Fe-Ni-Sn alloy phase is observed and the pore becomes bigger and spheroidal in Sn-added sintered steel.
(2) The effect of water-toughning, sintering atmosphere and Cu and Sn addition is not observede in nitric acid solution.
(3) The corrosion rate of sintered steel in sulfuric acid solution decreases by water-toughning. The corrosion rate of sintered steel sintered in hydrogen is smaller than that in vacuum.
(4) In sulfuric acid solution, the improvement of corrosion resistance of sintered steel is remarkable by Cu and Sn addition. And its corrosion rate is 1/5∼1/40 of sintered steel without addition.抄録全体を表示PDF形式でダウンロード (6059K) -
石川 英次郎, 水野 博司, 山崎 光雄, 猪狩 卓1976 年 47 巻 4 号 p. 253-260
発行日: 1976/10/15
公開日: 2009/05/25
ジャーナル フリーRelation between hot workability and alloying element in 50Cr-Ni alloys was studied.
Hot workability was estimated by the hot torsion and hot upsetting tests. The results abtained from the study were as follows:
1) Hot workability has been considerably improved by addtion of Ti or Zr and more addtion of Zr content reduces hot workability.
2) Hot workability has been improved by vacuum induction melted.
3) In a several hot corrosion tests, 50Cr-Ni alloy containing Ti, Zr or Nb showed behavior similar to that of 50Cr-50Ni alloy.抄録全体を表示PDF形式でダウンロード (2172K) -
錦織 清明1976 年 47 巻 4 号 p. 261-265
発行日: 1976/10/15
公開日: 2009/05/25
ジャーナル フリーPDF形式でダウンロード (210K)
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