对于铸件我们并不觉得陌生，铸件应用有着悠久的历史。在古代，人们用铸件做钱币祭器、兵器、工具和一些生活用具。然而在现代，铸件主要用于机器零部件的毛坯或者直接用作机器零部件。机械产品中铸件开始越来越占比例，用量也是逐年增加，铸件的形状、品种也在不断变化。铸件渐渐成为了我们日常生活中不可缺少的一部分，各类门把、门锁、小水管道等各类场合都可以看到铸件的运用。

铸件有优良的机械、物理性能，它可以有各种不同的强度、硬度、韧性配合的综合性能，还可兼具一种或多种特殊性能，如耐磨、耐高温和低温、耐腐蚀等。

铸件的重量和尺寸范围都很宽，重量最轻的只有几克，最重的可达到400吨，壁厚最薄的只有0.5毫米，最厚可超过1米，长度可由几毫米到十几米，可满足不同工业部门的使用要求。

Compare the differences between castings and stainless steel forgings:

1. Castings have good wear resistance and anti-vibration function, because graphite in cast iron is conducive to lubrication and oil storage, so the wear resistance is good.

2. Good casting process performance, gray cast iron is better than steel because of its high carbon content, close to eutectic composition, low melting point, good fluidity and small shrinkage, so it is suitable for casting with complex structure or thin wall.

3. Stainless steel can improve its structure and mechanical properties after forging.Casting organization after forging method of thermal deformation due to the deformation and recrystallization of stainless steel, make the original bulky dendrite and columnar grain to grain is fine and uniform axial recrystallization organization, make the ingot in the original segregation, porosity, porosity, slag compaction and welded, such as its organization become more closely, plasticity and mechanical properties of the metal.

4. The mechanical properties of castings are lower than those of forgings of the same material.However, the forging process can ensure the continuity of the metal fiber structure, so that the fiber structure of the forgings and the shape of the forgings are consistent, which can ensure that the parts have good mechanical properties and long service life. Forgings produced by precision die forging, cold extrusion, warm extrusion and other processes are incomparable to castings.

Both castings and stainless steel forgings are an indispensable part of mechanical production. In mechanical production, corresponding castings or forgings are selected according to the different properties of products. Only by giving full play to the role of castings or forgings can perfect mechanical products be produced.