Laser cladding of Al-Si on Al-Cu sintered alloy to improve wear resistance

• Autorzy: Fogagnolo J. B. , Candel J. J. , Amigó V.
• Języki publikacji: EN

Abstrakty

EN

Purpose: To improve the wear resistance of Al-Cu sintered parts by the use of a coating layer of hypereutectic Al-Si alloy deposited by laser cladding. Design/methodology/approach: Coaxial laser cladding was used to deposit a coating layer of hypereutectic Al-Si alloy on sintered Al-Cu alloy to improve its wear resistance. The laser cladding parameters were varied; firstly obtaining single laser cladding tracks and finally obtaining a larger area of coating by overlapping tracks. Findings: The Al-Si coating layer presented good metallurgical bonding with the sintered Al alloy and was composed mostly of eutectic Al-Si in the upper zone and alpha Al dendrites plus eutectic Al-Si in the lower zone. Laser also generates a melted layer in the base-sintered material, mainly composed of a columnar dendritic structure with copper segregated in the interdendritic region, which assured a gradual transition to the clad structure. Pin-on-disc tests showed that the wear resistance of the part was improved with the Al-Si coating. Practical implications: The wear resistance of sintered Al-Cu alloy was improved more than 70% using a coating layer of hypereutectic Al-Si alloy deposited by laser cladding. Originality/value: Single tracks and a continuous layer of Al-Si were successfully deposited by laser cladding on Al-Cu sintered parts. Pin-on-disk comparative tests showed an increase of more than 70% in wear resistance due to the Al-Si coating.

Słowa kluczowe

EN

powder metallurgy; surface treatment; laser processing

PL

metalurgia proszków; obróbka powierzchniowa; obróbka laserowa

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2015
• Tom: Vol. 73, nr 2
• Strony: 206--213
• Opis fizyczny: Bibliogr. 23 poz., rys., wykr.

Twórcy

autor

Fogagnolo J. B.

• Universidade Estadual de Campinas, Rua Mendeleiev, 200, 13083-970, Campinas, Brazil

autor

Candel J. J.

• Universitat Politècnica de Valencia, Camino de Vera s/n, 46022, Valencia, Spain

autor

Amigó V.

• Universitat Politècnica de Valencia, Camino de Vera s/n, 46022, Valencia, Spain

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