Development of nondestructive evaluation method for ductile cast iron with casting skin

• Project/Area Number: 25871025
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Materials/Mechanics of materials; Metal making/Resorce production engineering
• Research Institution: Asahikawa National College of Technology
• Principal Investigator: HORIKAWA Noritaka 旭川工業高等専門学校, システム制御情報工学科, 准教授 (80344480)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 球状黒鉛鋳鉄 / 非破壊試験 / 渦電流試験 / 基地組織 / 鋳肌 / 表面粗さ / 残留応力 / 機械材料・材料力学 / 金属生産工学 / 鋳造

Outline of Final Research Achievements

Nondestructive method for microstructure evaluation of ductile cast iron with various surface including casting surface was examined. Eddy current method was employed and the effects of the surface conditions on eddy current signal were investigated. Surface roughness and residual stress induced by machining indicated large effect on the eddy current signal. The effect of them can be distinguished by using both eddy current signals Vx and Vy. Lower testing frequency should be used to mitigate the effect of them. The change of the microstructure can be evaluated through the casting surface. The roughness of the casting surface affects detection of the chill structure.

Research Products

• [Presentation] Effect of Surface Condition on Eddy Current Evaluation of Ductile Cast Iron Matrix (2016)
  • Author(s): Noritaka HORIKAWA, Takato HONMA
  • Organizer: The 72nd World Foundry Congress
  • Place of Presentation: ポートメッセ名古屋（愛知県名古屋市）
  • Year and Date: 2016-05-21
  • Int'l Joint Research
• [Presentation] 薄肉球状黒鉛鋳鉄の渦電流試験における組織による信号変化と鋳肌の影響 (2016)
  • Author(s): 本間 渉人，堀川 紀孝
  • Organizer: 日本鋳造工学会北海道支部
  • Place of Presentation: 北海道総合研究プラザ（北海道札幌市）
  • Year and Date: 2016-04-22
• [Presentation] 鋳肌を有する薄肉球状黒鉛鋳鉄の渦電流信号に対する組織と粗さの影響 (2015)
  • Author(s): 本間渉人，堀川紀孝
  • Organizer: 第23回機械材料・材料加工技術講演会(M&P2015)
  • Place of Presentation: 広島大学（広島県西条市）
  • Year and Date: 2015-11-14
• [Presentation] 球状黒鉛鋳鉄の渦電流試験における測定面加工条件の影響 (2015)
  • Author(s): 野田裕介，堀川紀孝
  • Organizer: 日本鋳造工学会 第１66回全国講演大会
  • Place of Presentation: 早稲田大学（東京都新宿区）
  • Year and Date: 2015-05-24
• [Presentation] 球状黒鉛鋳鉄の渦電流試験における測定面加工条件の影響 (2015)
  • Author(s): 野田 裕介, 堀川 紀孝
  • Organizer: 日本鋳造工学会第１６６回全国講演大会
  • Place of Presentation: 早稲田大学（東京都）
  • Year and Date: 2015-05-23 – 2015-05-24
• [Presentation] 鋳肌を有する薄肉球状黒鉛鋳鉄の渦電流信号に対する組織の影響 (2015)
  • Author(s): 本間 渉人、堀川 紀孝
  • Organizer: 日本鋳造工学会 平成27年度北海道支部大会
  • Place of Presentation: 千歳アルカディアプラザ（北海道千歳市）
  • Year and Date: 2015-04-24
• [Presentation] Effect of surface roughness on eddy current signal of ductile cast iron with different matrix
  • Author(s): Noritaka HORIKAWA
  • Organizer: The 71st World Foundry Congress
  • Place of Presentation: Bilbao(SPAIN)
• [Presentation] 球状黒鉛鋳鉄の渦電流材質評価における表面性状の影響
  • Author(s): 野田裕介，堀川紀孝
  • Organizer: 日本機械学会北海道学生会 第43回学生員卒業研究発表講演会
  • Place of Presentation: 釧路市（北海道）