Mizobuchi, Shotaro*; Kano, Shigeki; Nakayama, Koichi; Namekawa, Masaru; Atsumo, Hideo
PNC TN951 75-14, 77 Pages, 1976/02
We have been conducting a series of self-welding and friction tests for the material selection of the contacting and sliding parts used in a fast breeder reactor. In the present study, we tested some candidate materials for duct pads of the fuel-assembly in high temperature sodium and argon, and made the evaluation of these materials. The following results were obtained: (1) tellite No.6 showed the stablefrictional behavior in 280 sodium, but incresed the frictional coefficient and flushing effect in 540 sodium. (2) Colmonoy No.6 showed the stable frictional coefficient 0f 0.30.4 under a heavy load (500 kg) or in high temperature sodium. (3) Chromecarbide materials showed the different frictional behavior according to the methods for finishing of the test surface. Frictional coefficient of the grinder-finish-ed chrome-carbide exceeded q.o, and indicated a greater flushing effect in 540 sodium. (4) hard chrome plating showed an unstable frictional behavior, the fric
Mizobuchi, Shotaro*; *; Koakutsu, Toru; Atsumo, Hideo
PNC TN941 75-55, 42 Pages, 1975/07
We have been conducted experiments to select for the contacting and sliding material use in F.B.R.. In present study, we tested in simulated condition for 6 kind of the candidated materials as duct pad of fuel assembly. The following results were obtained, (1)SUS316 showed a bad frictional behivor as the high frictional coefficient of 0.8, and hard chrome plating, also, have been unstable frictional behavior and become to the lower hardness after tested in 540C sodium. (2)The brush-finished chrome carbide showed the more stable frictional behaivor than the grinder-finished material, and frictional coefficient showed approximately 0.5. This coefficient was independent on the temperature in this test. (3)Colmonoy No.6 indicated the lowest frictional coefficient of 0.34 in materials of present studys. But, stellite No.6 showed a little unstable friction behavior even if tested in 280C sodium. (4)Each of tested materials were observed increasing frictional coefficient, after tested dwelling in 540C sodium. It was recognized that colmonoy No.6 and the brush-finished chrome carbide seem to be the promising as duct pad materials.
Mizobuchi, Shotaro*; Kano, Shigeki; Nakayama, Koichi; Namekawa, Masaru; Atsumo, Hideo
PNC TN941 75-49, 70 Pages, 1975/05
We have been tested self-welding and friction test for the material selection of the contacting and sliding parts used in Fast Breeder Reactor. In the present study, we tested some candidate materials for duct pad of the fuel-assembly in high temperature sodium, argon, and it have made the evaluation of these materials. The following results were obtained; (1)Stellite No.6 showed the stable frictional behavior in 280C sodium, but was increased the frictional Coefficient and flushing effect in 540C sodium. (2)Colmonoy No.6 showed the stable frictional coefficient of 0.30.4 under heavy load (500Kg) or in high temperature sodium. (3)Chrome-earbide materials were observed the different frietional behavior by the finishing methods of testing surface. Frictional coefficient of Grinder finished Chrome-Carbide exceeded about 1.0, and was indicated the greater flushing effect in 540C sodium. (4)Hard Chrome Plating showed the unstable frictional coefficient even in 280C sodium and it indicated the high frictional coefficient of 0.8. (5)Inconel 718 showed the frictional coefficient of 0.60.8, but it was observed the stable frictional behavior.
Mizobuchi, Shotaro*; Kano, Shigeki; Nakayama, Koichi; Namekawa, Masaru; *; Atsumo, Hideo
PNC TN941 75-12, 52 Pages, 1975/01
In this report, the effect of temperature on self-weldability of materials with various contact areas was investigated in 650C and 700C sodium, while investigated in 600C sodium in preceding reports (SN941 73-12 and N941 74-18). The following results were obtained; (1)The self-welding force of the combination of SUS316 vs. SUS316 was approximately 1100kg at all of test temperatures (600C, 650C and 700C). (2)The self-welding force of the combination of SUS316 vs. SUS316 was under the influence of the apparent contact area up to 650C, but was not at 700C. (3)The self-welding force of the combination of SUS316 vs. SUS420 came up to 3850kg and the metal transfer of more than 20m was observed after tensile test. Also, the self-selding behavior of this combination mainly results from the interdiffusion of alloy elements at the boundary layer. self-weldability and 100% of chrome carbide did not indicate the Self-weldability.
Mizobuchi, Shotaro*; Kano, Shigeki; Nakayama, Koichi; Namekawa, Masaru; Owada, Tetsuro*; Atsumo, Hideo
PNC TN941 75-13, 103 Pages, 1974/12
We developed and installed the self-welding equipment (SW-2) in self-welding Wearing Test Loop at the end of March, 1974, while had installed the wearing equipment at the end of March, 1972 and have continued to test in sodium and argon since then. SW-2 has the functions to simulate to the sliding and contact modes of LMFBR's components closelier than conventional equipments in foreign countries. The characteristics of SW-2 are as follow: (1)To be able to compress and self-weld materials in high temperature sodium and then to estimated self-weldability with the results of in-sodium tensile or in-sodium torsion tests of self-welded materials. (2)All of torsional, tensile and compressive loads can be gained by oil pressure units, and then the operation and structure of equipment became simple. (3)To be easily able to test in other environments (ex. in inert gas) by rolling the equipment of 180 degrees. (4)To be able to test under the normal load from less than 100kg to 4,000kg. Also, we conducted a part of the function test in high temperature argon and ascertained the performance of equipment to be satisfactory.
Mizobuchi, Shotaro*; Kano, Shigeki; *
PNC TN942 74-08, 189 Pages, 1974/10
Kano, Shigeki; Mizobuchi, Shotaro*; Namekawa, Masaru; Nakayama, Koichi; *; Atsumo, Hideo
PNC TN941 74-80, 89 Pages, 1974/10
It is desirable for the wear-resistance of material to be evaluated from the metallographic data of sliding surface as well as the fiction coefficient and the specific wear rate Ws. We mainly showed the results of metallographic analysis of materials desclibed in the preceding report. Also, we showed the friction coefficients, the wear rates and the results of metallographic analysis of material combinations tested in the first half of 1974. The tests yielded the following results: (1)The combinations of LC-1C vs. LC-1C and LW-1N40 vs. LW-1N40 showed the highest kinetic friction coefficient k(0.6) of all combination tested, but did not show any deformation and structural change except for LW-1N40(G/F) vs. LW-1N40(G/F). LW-1N40(G/F) cracked under the grinder finish of coating surface and then the fluctuation of friction coefficient became greater. (2)The combinations or Stellite No.6 vs. Stellite No.6, Colmonoy No.5 vs. Colmonoy No.6, and Deloro Stellite SF-60M vs. Colmonoy No.6 showed the lowest k(=0.3) and Ws(0) of all combinations tested. Moreover, these sliding surface layers were stable without any structural change. (3)SUS304 tended to make the static friction coefficient s higher and the combination of SUS 304 vs. SUS304 showed the highest s(=0.6) of all combinations tested. Also, this easily raised the plastic deformation and this sliding surface was considerably rough. (4)Inconel X750 and LW-5 considerably showed the plastic deformation and the structural shange on these sliding surface layers. The combination of Inconel X750 vs. Inconel X750 showed the highest Ws of all the combinations tested.
Mizobuchi, Shotaro*; Kano, Shigeki; Namekawa, Masaru; Owada, Tetsuro*; Atsumo, Hideo
PNC TN941 74-18, 41 Pages, 1974/03
In this Experiment, We conducted Self-Welding Test about the Refractory Metal such as Tungsten, Molybdenum and Hard Metal (ex. Chrome-Carbide, Stellite No.6), Nickel, Niehrome. The Following Results were obtained. (1)Chrome-Carbide (coated with Detonation Gun) was effective as an Anti-Welding Material, but the Carbide with the content of Tungsten showed a strong Tendency to Self-Welding. (2)Tungsten and Molybdenum (coated with Wire Explosion Gun) were effective as Anti-Welding Materials. (3)Stellite No.6 combinated with Austenitic Stainless Steel (SUS316) showed a Tendency to Self-Welding. (4)Nickel and Nichrome were completely Self-Welded by the Formation of Diffusion Zone.
Kano, Shigeki; Mizobuchi, Shotaro*; Namekawa, Masaru; *; Atsumo, Hideo; Owada, Tetsuro*
PNC TN941 73-17, 99 Pages, 1973/06
In views of the limitation of use and the durability, it is necessary to use wear resistant materials for sliding components of sodium cooled reactors. Therefore, it is required that we obtain wear data about these materials in high temperature sodium. We conducted wear tests about various pairs of hard metals (stellite No.1, stellite No.6, colmonoy No.5 and colmonoy No.6). The tests yielded the following results: (1)The specific wear rate was less and the friction coefficient was lower and more stable in the test about a pair of hard metals (Colmonoy No.5 & No.6) than about both pairs of SUS304 coupled with stellite No.1 and Colmonoy No.6. (2)The friction coefficient was lower in the test about the pair of SUS304 coupled with stellite No.1 than coupled with colmonoy No.6. (3)The friction-affected Layer was found on the sliding surface. (4)The appearance of the sliding surface was considerably different between in sodium and in argon.