선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
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선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- 2. Bush parts was designed into the sand casting, casting solidification analysis was performed according to wear-resistant alloy casting, and then temperature distribution, pouring time, Mis-run, and shrinkage cavity according to the filling rate were investigated for the optimum casting methods.
- The roughing and finishing were followed according to the drawing. Finally, composition inspection, penetrant inspection, and dimensional inspection were performed.
- In order to analyze solidification of sand casting for the bush parts, casting product, core, sprue, runner, and riser were modeled with 3D, spitted into triangular meshes with gap between mesh at 10mm for sand casting mold, and at 5mm for casting product, core, and runner. Further, gravity direction setup, casting material, core material, sand casting material, heat transfer coefficient, pouring time, pouring temperature, cooling condition, and atmospheric temperature were input for the analysis. Fig.
- In order to analyze solidification of sand casting for the bush parts, casting product, core, sprue, runner, and riser were modeled with 3D, spitted into triangular meshes with gap between mesh at 10mm for sand casting mold, and at 5mm for casting product, core, and runner. Further, gravity direction setup, casting material, core material, sand casting material, heat transfer coefficient, pouring time, pouring temperature, cooling condition, and atmospheric temperature were input for the analysis.
- Sand casting process was suggested in this study in order to develop bush parts for continuous hot-dip galvanizing roll with wear-resistant alloy casting material. Wear test, casting solidification analysis, designing and fabrication of the mockup mold, and performance evaluation for the trial products were conducted in order to design a sand casting process for the bush parts.
- 14, but the shrinkage cavity was appeared at the connected portion between the riser and the product, which implies that the shrinkage cavity would appear on the surface after riser is removed. Secondary solidification analysis was carried out after changing riser position and increasing height by 20mm for the bush parts. Shrinkage cavity was not found at the connected portion to the riser as shown in Fig.
- 20 shows the bush assembly executed by the sand casting. The bush casting parts made of wear-resistant alloy casting was then processed with roughing and finishing, and finally composition inspection, penetrant inspection, and dimensional inspection were conducted for the finished products.
- To improve this problem, bush parts development is needed by implementing wear-resistant alloy casting materials and by designing a sand casting process[14~16]. This study aims to develop bush parts having a long life for sink roll in the continuous hot-dip galvanizing equipment by implementing a sand casting process for the wear-resistant alloy casting material capable of reducing production cost and extending die life.
- Sand casting process was suggested in this study in order to develop bush parts for continuous hot-dip galvanizing roll with wear-resistant alloy casting material. Wear test, casting solidification analysis, designing and fabrication of the mockup mold, and performance evaluation for the trial products were conducted in order to design a sand casting process for the bush parts. The findings are as follows;
대상 데이터
- The analysis conditions used in the casting solidification analysis are as in Table 3. The materials used for wear-resistant alloy steel were Stellite 6, Stellite 20, and T800, while silica(SiO2) was used as a material for silica sand. Table 4 shows analysis conditions of sand casting mold for the bush parts.
이론/모형
- For the wear test, pin-on-disk method is generally and widely being used. Pin-on-disk wear test was performed to evaluate friction coefficient for the wear-resistant alloy casting material. Pin and disk specimens were prepared for the wear test.
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