铸造和锻造是说的法兰的生产工艺,法兰的生产工艺主要分为锻造、铸造、割制、卷制这四种。锻造和铸造是其中的两种工艺。铸造出来的法兰,毛坯形状尺寸准确,加工量小,成本低,但有铸造缺陷(气孔.裂纹.夹杂);铸件内部组织流线型较差(如果是切削件,流线型更差);锻造法兰一般比铸造法兰含碳低不易生锈,锻件流线型好,组织比较致密,钨钢铰刀机械性能优于铸造;锻造工艺不当也会出现晶粒大或不均,硬化裂纹现象,锻造成本高于铸造法兰。锻件比铸件能承受更高的剪切力和拉伸力。铸件的优点在于可以搞出比较复杂的外形,成本比较低;锻件优点在于内部组织均匀,不存在铸件中的气孔,夹杂等有害缺陷;锻造工艺过程一般由以下工序组成,即选取优质钢坯下料、加热、成形、锻后冷却。锻造的工艺方法有自由锻、模锻和胎膜锻。生产时,按锻件质量的大小,生产批量的多少选择不同的锻造方法。

Casting and forging is the flange production process, flange production process is divided into forging, casting, cutting, coiling of these four. Forging and casting are two of them. The river will give you different maoxing flange pipe flange is about the two. Flange cast out, blank shape and precise size, small processing quantity and low cost, but the casting defects (pores. Cracks. Inclusion of casting structure); streamlined poor (if it is cut, streamlined worse) than the general casting flange forging flange; low carbon is not easy to rust, forging streamline, organization dense, mechanical performance is better than that of tungsten steel reamer casting; forging process will also appear improper or uneven grain, hardening crack phenomenon, the cost is higher than the casting forging flange. The forging can bear higher shear force and tensile force than the casting. The advantages of casting could have complicated shape, the cost is relatively low; forging has the advantages of uniform internal organization, there is no porosity in castings, inclusions and other harmful defects; forging process generally consists of the following steps, namely using high quality material, billet heating, forming, cooling after forging. The forging process includes free forging, die forging and die forging. In production, according to the quality of forgings, the quantity of production, how to choose different forging methods.