著者
森中 真行
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 (ISSN:13420429)
巻号頁・発行日
vol.85, no.8, pp.508-516, 2013-08-25 (Released:2018-01-01)
参考文献数
65
著者
新井 宏
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 (ISSN:13420429)
巻号頁・発行日
vol.76, no.7, pp.599-606, 2004-07-25 (Released:2015-01-10)
参考文献数
13
著者
中井 実 斎藤 省三 岡林 邦夫
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳物 (ISSN:00214396)
巻号頁・発行日
vol.32, no.11, pp.765-772, 1960-11-25 (Released:2012-10-30)
参考文献数
8

Not a small amount is spent on the brake shoes in the expenditures of railway maintenance. And great efforts have been made to cut down this expense.   As a result of adapting High Phosphorus Cast Iron Brake Shoes, Kinki Nippon Railway Company has succeeded in cutting down much of the cost, by prolonging its life more than 45% in the year 1959 as compared with that of 1951. This reprot shows the following two points which prove the superiority of High Phosphorus Brake Shoes.   These results were obtained both by actual car tests and by laboratorial test. 1. It is possible to say that High Phosporus Cast Iron Brake Shoes of Kinki Nippon Railway Co. specification of about H.B.250 wear almost 20% less than most widely used Low Phosphorus Brake Shoes of about H.B.220. 2. When the effect on the wear of tire wheels is considered, it is also possible to say that when Low Phosphorus Cast Iron Brake Shoes are used, the degree of wear runs parallel with the hardness of the material. But when High Phosphorus Cast Iron Brake Shoes are used no tendency as mentioned above can be found, and it is also made clear that the use of High Phosphorus Cast Iron Brake Shoes is good for both wheels and Brake Shoes.
著者
石野 亨
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳物 (ISSN:00214396)
巻号頁・発行日
vol.67, no.2, pp.118-123, 1995-02-25 (Released:2015-01-21)
参考文献数
25
著者
中野 俊雄
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 (ISSN:13420429)
巻号頁・発行日
vol.80, no.8, pp.494-504, 2008-08-25 (Released:2015-01-13)
参考文献数
47
著者
中野 俊雄
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 (ISSN:13420429)
巻号頁・発行日
vol.77, no.12, pp.857-862, 2005-12-25 (Released:2015-01-10)
参考文献数
27
著者
中野 俊雄
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 (ISSN:13420429)
巻号頁・発行日
vol.83, no.3, pp.161-166, 2011-03-25 (Released:2016-01-01)
参考文献数
19
著者
梶川 義明
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 (ISSN:13420429)
巻号頁・発行日
vol.68, no.12, pp.1106-1112, 1996-12-25 (Released:2014-12-18)
参考文献数
23
被引用文献数
2
著者
岡安 光博 西 直美 金沢 憲一
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 (ISSN:13420429)
巻号頁・発行日
vol.70, no.4, pp.266-272, 1998-04-25 (Released:2011-02-01)
参考文献数
8
被引用文献数
4

Effects of silicon content are investigated on tensile properties and crack propagation behavior of Al-Si-Cu alloy die castings. The specimens are made by the low velocity shot die casting method. Silicon content of alloy is varied from 8.6 mass % to 15.4 mass %. The tensile strength and the elongation of hypo-eutectic Al-Si alloys are higher than those of hyper-eutectic Al-Si alloys. In the case of hypo-eutectic Al-Si-Cu alloys, a crack propagates through the eutectic phase in inter-dendrite region or α-Al dendrite. In the case of hyper-eutectic silicon alloy, the primary silicon acts as the origin of fracture because primary silicon crystallizes with facet planes. The crack mainly propagates through primary silicon grains or along eutectic silicon. Primary silicon particles tend to segregate in case of low velocity injection casting. This macro-segregation of primary silicon particles deteriorates the mechanical properties. Especially tensile strength decreases with increase of segregation.
著者
堤 信久 橋本 長人
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳物 (ISSN:00214396)
巻号頁・発行日
vol.63, no.11, pp.877-882, 1991-11-25 (Released:2011-07-08)
参考文献数
10
被引用文献数
1

Two antagonistic properties i. e., higher modulus of elasticity and higher damping capacity are required simultaneously to piano frame with gray iron castings. With a view of improving the quality of present frame, damping capacity, natural frequency and power spectrum of gray cast iron specimen were analyzed by measuring the sound emission when the center of the specimen held at two fixed positions by tungsten wires was hammered on specially designed experimental apparatus. From results obtained, it has been clarified that the changing of matrix to ferritic from pearlitic raises damping capacity, but decreases power spectrum. The changing of matrix to pearlitic or martensitic from ferritic, however, lowers natural frequency which has been thought as the parameter of modulus of elasticity of cast iron.
著者
小林 正和 杉浦 協司 竹下 裕市 戸田 裕之
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 (ISSN:13420429)
巻号頁・発行日
vol.86, no.3, pp.209-215, 2014

<p>  The feasibility of applying the fluidized bed furnace to the solution and aging treatments of aluminum alloys was assessed by examining concerns such as the efficiency of heat treatments and delay of quenching, together with its merits such as the shortening of heat treatment and the possibility of high temperature heat treatments.</p><p>  It was concluded that this method realizes high efficiency of heat treatments, which is comparable to that attainable with the combination of a salt bath and oil bath. By suppressing the delay time within 20 to 30sec. after the removal of works from the fluidized bed furnace, no degradation in mechanical properties occurs. The allowable delay time is dependent on the work size. The solution treatment time can be shortened to 60min. or below. Good mechanical properties were obtained even with a short solution treatment time of 15min. depending on the size and thickness of the work. This also enables suppression of pore growth at the same time. In addition, high temperature heat treatment at around ternary eutectic temperatures was realized by precise temperature control, thereby realizing superior mechanical properties and shorter heat treatment time.</p>
著者
岡根 利光
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 (ISSN:13420429)
巻号頁・発行日
vol.85, no.6, pp.381-385, 2013-06-25 (Released:2018-01-01)
参考文献数
14
著者
田辺 郁 茂木 徹一 マリア エレナ ロベルト
出版者
公益社団法人 日本鋳造工学会
雑誌
鋳造工学 (ISSN:13420429)
巻号頁・発行日
vol.75, no.7, pp.474-478, 2003

&nbsp;&nbsp;In order to demonstrate the superiority of granular grain structure for thixocasting materials, semisolid samples with granular and dendrite structures were cast into a permanent mold by a punch. The test piece consisting of granular crystals revealed that the punch power was less than 1 kN until three quarters of the casting process. In contrast, the structure consisting of dendrite crystals revealed that the punch power was greater than 8 kN until one quarter of the casting process, and the power increased as the casting process proceeded. Granular grains of primary &alpha; aluminum surrounded by liquid phase could be easily moved into the die cavity, since the liquid phase acted as a lubricant. However, with test piece consisting of dendrite crystals, the liquid phase only moved at the first stage and the deformation resistance increased.