All issues
Volume 32, Issue 10
Displaying 1-8 of 8 articles from this issue
- |<
- <
- 1
- >
- >|
-
Hiroaki NAKAGAWA1982Volume 32Issue 10 Pages 503-504
Published: October 30, 1982
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSDownload PDF (267K) -
Takio TANAKA, Hajime YAMADA1982Volume 32Issue 10 Pages 505-510
Published: October 30, 1982
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSThe cutting temperature and its effect on the built-up edge in turning of AC3A, AC7A and AC1A castings were examined. AC7A permits the highest cutting temperature and AC1A does the lowest one at the cutting speed bellow the inflection point in the cutting temperature-cutting speed curve. All the test alloys show, however, nearly the same cutting temperatures at the cutting speed over this point. The feed has the least effect on the cutting temperature in cutting of AC3A. The built-up edge of AC7A and AC1A disappears respectively at cutting temperatures from about 350° to 400°C and about 400°C. The built-up edge of AC3A does not disappear at such a temperature range.View full abstractDownload PDF (678K) -
Tsuneo TAKAHASHI, Yuzo TAKATSUJI, Shigeru YAMADA1982Volume 32Issue 10 Pages 511-516
Published: October 30, 1982
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSThe machinability in dry cutting of Na, Sr and Sb-modified Al-Si alloy castings containing Si 7 to 10% and Mg 0 to 0.3% were studied from the viewpoints of cutting resistance, tool wear and roughness of cut surfaces. As eutectic silicon particles in the alloys are refined and mechanical properties of the alloys are improved, the tool wear is effectively moderated. An improvement in machinability is particularly achieved in cutting of the Sb-modified alloys.View full abstractDownload PDF (2531K) -
Hidetoshi KOBAYASHI, Shiro SATO1982Volume 32Issue 10 Pages 517-522
Published: October 30, 1982
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSVickers and Brinell hardness tests respectively on 1200, 3003 and 5052 wrought sheets and 1050, 5052 and 6061 plates were carried out using underlaid plates different in thickness and hardness. If the underlaid plate less in hardness than the specimen is used, the Vickers test values rapidly lower with decrease in T/t, where T is the specimen thickness and t the depth of indentation. If the underlaid plate equal to the specimen in hardness or more is used, on the other hand, the values lower to a less degree by about 5% at T/t = 4. Vickers testing of double thicknesses of sheet specimen is recommended. The Brinell test values also considerably lower with decrease in T/t in the same way, when the soft underlaid plate is used. If the underlaid plate such as hard steel much harder than the specimen, the HB values rise very slightly with decrease in T/t.View full abstractDownload PDF (1006K) -
Sigeo ZAIMA, Yuzo TAKATSUJI, Masaji IIO, Shigeru YAMADA1982Volume 32Issue 10 Pages 523-529
Published: October 30, 1982
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSA machinability test in dry cutting of AC3A castings to which effective modifiers Sr up to 0.36% and Sb up to 0.20% had been added was carried out using a high speed steel tool. Mechanical properties of the alloy are improved by Sr and Sb-modification. The modification using certain amounts of additives, 0.010%Sr and 0.20%Sb in this work, slightly prolongs the tool life. The overall machinability is improved, however, not so effectively as expected from the viewpoints of cutting resistance, chip condition and roughness of cut surfaces.View full abstractDownload PDF (2290K) -
Tetsuya TAKAAI, Teruyoshi DAITOH, Takashi ISHIGAMI1982Volume 32Issue 10 Pages 530-538
Published: October 30, 1982
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSInstrumented Charpy impact testing of V-notched cut from rolled plates in different positions and directions was made at temperatures -196° to 200°C. Absorbed energy Ea and crack propagation energy Ep depend on the cutting-off position and direction and on the testing temperature to a great degree. The specimen cut in the direction parallel to the rolling direction in which a standard V-notch lies on the rolled surface has the highest Ea and Ep. The specimen cut in the direction transverse to the rolling direction in which a V-notch lies in the direction transverse to the rolled surface has the least Ea and Ep. The highest Ea and Ep are 1.5 times or more of the least ones. The minimum temperature dependence is found in the specimen having the maximum Ea. A linear relation lies between Ea and Ei + Ep, where Ei is crack initiation energy. Ei + Ep is about 0.75 to 0.78 times of Ea.View full abstractDownload PDF (2957K) -
Toshiro KOBAYASHI1982Volume 32Issue 10 Pages 539-552
Published: October 30, 1982
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSDownload PDF (2590K) -
Kumio TAKADA1982Volume 32Issue 10 Pages 553-568
Published: October 30, 1982
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSDownload PDF (3197K)
- |<
- <
- 1
- >
- >|