Avaliação de resistência ao desgaste abrasivo de vários tipos de materiais instalados na lateral de esteira transportadora
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Data
2017-04-04
Autores
Cardines, André Luis Freitas [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Com intuito de aumentar a disponibilidade dos equipamentos e reduzir custo de manutenção além de possibilitar a realização de entressafras em períodos reduzidos, as indústrias do setor sucroenergético têm buscado materiais de maior resistência para aplicações específicas. Diante desta condição este trabalho avaliou o desgaste em corpos de prova instalados em pontos distintos de uma esteira transportadora de toletes de cana colhidos mecanicamente. A comparação foi realizada entre cinco tipos de chapas metálicas, sendo a liga metálica ASTM A36 a mais utilizada para este fim. Os demais materiais pertencem à família dos aços inoxidáveis e dos aços ligas, sendo denominados: AISI 304, AISI 439, AISI 410D e HARDOX 450. Todos os materiais foram submetidos a análises químicas, micrografia, macrografia e dureza, com intuito de comprovar a diferença desses materiais, além disso, realizou-se a constatação do melhor material por meio de teste físico em local de alta abrasão e das análises realizadas. Todos os ensaios ocorreram durante o período de safra de cana-de-açúcar, entre os meses de março a novembro de 2016. Esses ensaios demonstraram os desgastes no decorrer dos meses de estudo, apresentando um desgaste médio final ao término da safra, no qual o HARDOX 450 demonstrou ser o material de menor desgaste. Para cada caso estudado foi apresentada uma análise econômica de modo a direcionar o melhor material a ser aplicado.
In order to increase the availability of equipment and reduce maintenance costs in addition to enabling off-season in a reduced period of time, the industries of the sugarcane industry's sector have sought higher resistance materials for specific applications. Given this condition, this work evaluated the wear on test specimens installed at different points on a conveyor belt of mechanically harvested cane. The comparison was made between five types of sheet metal, the metal alloy ASTM A36 being the most used for this purpose. The other materials belong to the family of stainless steels and alloys, being named: AISI 304, AISI 439, AISI 410D and HARDOX 450. All the materials were submitted to chemical analysis, micrography, macrography and hardness, in order to prove the difference of these materials, in addition, the best material was verified by means of physical test in place of high abrasion and the analyzes performed.. All the tests took place during the sugarcane harvest period, between March and November of 2016. These tests showed wear during the study months, showing a final average wear at the end of the harvest, in which HARDOX 450 was the least wear resistant material. For each case an economic analysis was presented in order to direct the best material to be applied.
In order to increase the availability of equipment and reduce maintenance costs in addition to enabling off-season in a reduced period of time, the industries of the sugarcane industry's sector have sought higher resistance materials for specific applications. Given this condition, this work evaluated the wear on test specimens installed at different points on a conveyor belt of mechanically harvested cane. The comparison was made between five types of sheet metal, the metal alloy ASTM A36 being the most used for this purpose. The other materials belong to the family of stainless steels and alloys, being named: AISI 304, AISI 439, AISI 410D and HARDOX 450. All the materials were submitted to chemical analysis, micrography, macrography and hardness, in order to prove the difference of these materials, in addition, the best material was verified by means of physical test in place of high abrasion and the analyzes performed.. All the tests took place during the sugarcane harvest period, between March and November of 2016. These tests showed wear during the study months, showing a final average wear at the end of the harvest, in which HARDOX 450 was the least wear resistant material. For each case an economic analysis was presented in order to direct the best material to be applied.
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Palavras-chave
Desgaste, Abrasão, Aço carbono, Aço liga