{"id":3264,"count":6,"description":"\r\n\r\n\r\n\r\nOBTER INFORMA\u00c7\u00d5ES SOBRE FORJADOS VS FERROS FUNDIDOS<\/strong><\/a>\r\n\r\n\r\n\r\n\r\n

Forjado<\/h2>\r\n\r\n\r\n\r\n\r\nForjamento refere-se a um processo no qual um material \u00e9 geralmente aquecido, mantendo um estado s\u00f3lido, e ent\u00e3o for\u00e7ado a adquirir a forma desejada. Agora, para explicar melhor, devemos usar nossos chap\u00e9us de engenharia de materiais.\r\n\r\n\r\n\r\n\r\n\r\nOs metais t\u00eam uma estrutura cristalina. Voc\u00ea pode pensar nisso como madeira. A madeira tem gr\u00e3os e esses gr\u00e3os s\u00e3o orientados em um determinado padr\u00e3o. Portanto, a resist\u00eancia da madeira depende de como esses gr\u00e3os est\u00e3o orientados. Por exemplo, \u00e9 muito mais f\u00e1cil lascar uma tora para obter lenha quando os gr\u00e3os est\u00e3o orientados verticalmente. O metal \u00e9 da mesma maneira. Se voc\u00ea examinar o metal ao microsc\u00f3pio, ele ter\u00e1 os mesmos gr\u00e3os que voc\u00ea associa \u00e0 madeira.\r\n\r\n\r\n\r\n\r\n\r\nQuando os lingotes met\u00e1licos s\u00e3o formados, aten\u00e7\u00e3o especial \u00e9 dada \u00e0 cria\u00e7\u00e3o de uma estrutura cristalina uniforme e consistente. Os tamanhos dos gr\u00e3os s\u00e3o semelhantes e fluem juntos. Conforme afirmado anteriormente, isso maximiza a resist\u00eancia, consist\u00eancia e durabilidade do metal.\r\n\r\n\r\n\r\n\r\n\r\nAgora, quando se forja algo a partir desse lingote de metal, aquece-se o lingote para o tornar male\u00e1vel, mas n\u00e3o o suficiente para quebrar a estrutura cristalina do gr\u00e3o. Pense num ferreiro. Os ferreiros aquecem o metal at\u00e9 ficar em brasa e depois moldam-no numa bigorna. Isto \u00e9 forjar. N\u00e3o os vemos a fundir o metal num l\u00edquido. Ao manter o metal s\u00f3lido durante todo o processo, este acaba por ser um objeto muito mais forte. Por isso, as espadas, facas, etc., s\u00e3o historicamente forjadas.\r\n\r\n\r\n\r\n\r\n

Ferros Fundidos<\/h2>\r\n\r\n\r\n\r\n\r\nFundir um objeto requer construir um molde e despejar metal l\u00edquido nele. Esse processo \u00e9 \u00f3timo, pois permite a f\u00e1cil fabrica\u00e7\u00e3o e a cria\u00e7\u00e3o de pe\u00e7as complexas com c\u00e2maras ocas, como o bloco do motor de um ve\u00edculo. O fabricante pode usar um material fund\u00edvel, como cera, dentro de um molde de areia para formar essas formas complexas.\r\n\r\n\r\n\r\n\r\n\r\nInfelizmente, uma vez que o metal se torna l\u00edquido, a estrutura do gr\u00e3o cristalino se quebra. \u00c0 medida que um objeto fundido rec\u00e9m-formado esfria e se torna s\u00f3lido novamente, a estrutura do gr\u00e3o se reforma, mas desta vez de forma muito mais aleat\u00f3ria e inconsistente. Tamb\u00e9m existe a possibilidade de o ar aprisionado criar pontos fracos. O metal se torna mais parecido com aglomerado ou papel\u00e3o em termos de estrutura do que com um peda\u00e7o normal de madeira.\r\n\r\n\r\n\r\n\r\n\r\nAgora, isso torna as pe\u00e7as fundidas fracas? Absolutamente n\u00e3o. Nos \u00faltimos milhares de anos, os humanos ficaram muito bons na fabrica\u00e7\u00e3o de pe\u00e7as met\u00e1licas fundidas. Furos de ventila\u00e7\u00e3o, press\u00e3o de v\u00e1cuo e outros avan\u00e7os aumentam a qualidade do metal fundido. Conforme declarado, metal fundido \u00e9 o material que os blocos de motor de ve\u00edculos s\u00e3o feitos e que devem suportar tens\u00f5es e tens\u00f5es extremas.\r\n\r\n\r\n\r\n\r\n

Processo de Fabrica\u00e7\u00e3o Forjado vs Ferros Fundidos<\/h2>\r\n\r\n\r\n\r\n\r\nA primeira coisa a saber \u00e9 que \"fundido\" e \"forjado\" n\u00e3o s\u00e3o mais do que termos que descrevem o processo de fabrico do ferro ou de um conjunto de ferros.\r\n\r\n\r\n\r\n\r\n\r\nO processo de fundi\u00e7\u00e3o: Quando um ferro de golfe \u00e9 fundido, o metal utilizado para fazer o ferro \u00e9 aquecido at\u00e9 ao seu ponto de fus\u00e3o, tornando-se num l\u00edquido. De seguida, \u00e9 vertido nos moldes das cabe\u00e7as de ferro. Quando arrefece e endurece, voil\u00e1, temos os ferros de golfe.\r\nO processo de forja: Quando um ferro de golfe \u00e9 forjado, o metal s\u00f3lido da cabe\u00e7a do taco \u00e9 literalmente batido ou comprimido at\u00e9 tomar a forma desejada. Depois disso, s\u00e3o efectuados v\u00e1rios outros passos de perfura\u00e7\u00e3o e maquinagem para terminar o processo de fabrico.\r\n\r\n\r\n\r\n\r\n

Forjar \u00e9 mais forte que fundir.<\/h2>\r\n\r\n\r\n\r\n\r\nUma das principais raz\u00f5es pelas quais optamos por fornecer servi\u00e7os de forjamento \u00e9 que isso fornece um produto final mais forte para nossos parceiros. De acordo com estudo realizado pelo Departamento de Engenharia Industrial e de Manufatura da Universidade de Toledo:\r\n\r\n\r\n\r\n\r\n
    \r\n \t
  • As pe\u00e7as forjadas tinham uma resist\u00eancia \u00e0 tra\u00e7\u00e3o 26% maior do que as mesmas pe\u00e7as fundidas.<\/li>\r\n \t
  • As pe\u00e7as forjadas tinham maior resist\u00eancia \u00e0 fadiga 37%, resultando em uma vida \u00fatil muito mais longa do que as pe\u00e7as fundidas.<\/li>\r\n \t
  • O ferro fundido tinha apenas 66% da resist\u00eancia ao escoamento do a\u00e7o forjado, uma medida que indica a quantidade de carga que o metal pode suportar antes de se deformar.<\/li>\r\n \t
  • As pe\u00e7as forjadas tiveram uma redu\u00e7\u00e3o de 58% na \u00e1rea quando puxadas at\u00e9 a falha, em compara\u00e7\u00e3o com uma redu\u00e7\u00e3o de 6% para pe\u00e7as fundidas. Isso significa que as pe\u00e7as forjadas permitem uma deforma\u00e7\u00e3o muito maior antes da falha do que as pe\u00e7as fundidas.<\/li>\r\n<\/ul>\r\n","link":"https:\/\/zecovalve.com\/pt\/tag\/forged-vs-cast-irons","name":"Ferros Forjados vs Fundidos","slug":"forged-vs-cast-irons","taxonomy":"post_tag","meta":[],"yoast_head":"\nForged vs Cast Irons - Forged Irons vs Cast Irons Valve | ZECO Valve<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zecovalve.com\/pt\/tag\/forged-vs-cast-irons\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Forged vs Cast Irons - Forged Irons vs Cast Irons Valve | ZECO Valve\" \/>\n<meta property=\"og:description\" content=\"GET FORGED VS CAST IRONS INFORMATION Forged Forging refers to a process in which a material is usually heated, while maintaining a solid state, and then forced into the shape desired. Now to explain better, we must put on our material engineering hats. Metals have a crystalline structure. You can think of it like wood. Wood has grains and those grains are oriented in a certain pattern. Therefore, the strength of wood depends on how those grains are oriented. For example, it is much easier to splinter a log for firewood when the grains are oriented vertically. Metal is the same way. If you examine metal under a microscope it will have the same grains that you associate with wood. When metal ingots are formed, special attention is made to creating a uniform and consistent crystalline structure. The grain sizes are similar and flow together. As previously stated, this maximizes the strength, consistency, and durability of the metal. Now when you forge something out of that metal ingot, you heat the ingot to make it malleable but not enough to break apart the crystalline grain structure. Think of a blacksmith. Blacksmiths heat metal till it’s red hot and then form it on an anvil. This is forging. You do not see them melting the metal into a liquid. By keeping the metal, solid throughout the entire process, it ends up being a much stronger object. Therefore, swords, knives, etc. have historically been forged. Cast Irons Casting an object requires building a mold and pouring liquid metal into it. This process is great, as it allows for easy manufacturing and the creation of complex parts with hollow chambers such as with an engine block of a vehicle. The manufacturer can use a meltable material such as wax inside a sand mold to form these complex shapes. Unfortunately, once the metal becomes a liquid the crystalline grain structure breaks down. As a newly formed cast object cools down and becomes solid again, the grain structure reforms but this time much more randomly and inconsistently. There also is the potential for trapped air to create weak points. The metal becomes more like particle board or cardboard in terms of structure than a normal piece of wood. Now does this make cast parts weak? Absolutely not. Over the past couple thousand years, humans have gotten pretty good at making cast metal parts. Ventilation holes, vacuum pressure, and other advances increase the quality of cast metal. As stated, cast metal is what vehicle engine blocks are made from those are expected to withstand extreme stress and strain. Manufacturing Process Forged vs Cast Irons The first thing to know is that “cast” and “forged” are nothing more than terms describing the manufacturing process of iron or a set of irons. The casting process: When a golf iron is cast, the metal used to make the iron is heated to its melting point, becoming a liquid. It is then poured into the molds of the iron heads. When it cools and hardens, voila, you have golf irons. The forging process: When a golf iron is forged, the solid metal of the club head is literally pounded or compressed until it takes the desired shape. After that, a number of other drilling and machining steps take place to finish the manufacturing process. Forging is stronger than casting. One of the main reasons we choose to provide forging services is that it provides a stronger end product for our partners. According to a study performed by the Industrial & Manufacturing Engineering Department at the University of Toledo: Forged parts had a 26% higher tensile strength than the same cast parts. Forged parts had a 37% higher fatigue strength resulting in a much longer lifespan than cast parts. Cast iron only had 66% of the yield strength of forged steel, a measurement that indicates the load amount metal can hold before deforming. The forged parts had a 58% reduction in the area when pulled to failure, compared to a 6% reduction for cast parts. 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