Compared with other rapid prototyping processes, selective laser sintering rapid prototyping process has more advantages:

选择性激光烧结快速成型工艺可直接制作金属制品

Selective laser sintering rapid prototyping technology can directly make metal products

在目前广泛应用的几种快速成型工艺方法中，唯有SLS方法可直接烧结制作金属材质的原型，这是SLS工艺的独特优点。

Among several rapid prototyping processes widely used at present, only SLS method can directly sinter metal prototypes, which is the unique advantage of SLS process.

选择性激光烧结快速成型工艺可采用多种材料

A variety of materials can be used in selective laser sintering rapid prototyping process

从原理上说，这种方法可采用加热时粘度降低的任何粉末材料，通过材料或各类含粘结剂的涂层颗粒制造出任何造型，适应不同的需要。

In principle, this method can use any powder material with reduced viscosity during heating to produce any shape through materials or various coating particles containing binder to meet different needs.

选择性激光烧结快速成型工艺制造工艺比较简单

The manufacturing process of selective laser sintering rapid prototyping is relatively simple

由于可用多种材料，选择性激光烧结工艺按采用的原料不同可以直接生产复杂形状的原型、型腔模三维构件或部件及工具。例如，制造概念原型，可安装为产品模型的概念原型，蜡模铸造模型及其它少量母模，直接制造金属注塑模等。

Due to the availability of a variety of materials, the selective laser sintering process can directly produce three-dimensional components or parts and tools of prototype and cavity mold with complex shapes according to different raw materials. For example, manufacturing conceptual prototypes can be installed as conceptual prototypes of product models, wax mold casting models and a small number of other master molds, and directly manufacturing metal injection molds.

选择性激光烧结快速成型工艺无需支撑结构

Selective laser sintering rapid prototyping process does not need support structure

和LOM工艺一样，SLS工艺也无需设计和需要支撑结构，叠层过程中出现的悬空层面可直接由未烧结的粉末来实现支撑。

Like LOM Process, SLS process does not need to design and support structure, and the suspended layer in the lamination process can be directly supported by unsintered powder.

选择性激光烧结快速成型工艺材料利用率高

Selective laser sintering rapid prototyping process has high material utilization

由于SLS工艺过程不需要支撑结构，也不象LOM工艺那样出现许多工艺废料，也不需要制作基底支撑，所以该工艺方法在常见的几种快速原型工艺中材料利用率是高的，材料的利用率基本可以认为是100%。SLS工艺中的多数粉末的较便宜，所以SLS模型的成本相比较来看也是较低的。

Because the SLS process does not need support structure, nor does it have many process wastes like LOM Process, nor does it need to make substrate support, the material utilization rate of this process method is high in several common rapid prototyping processes, and the material utilization rate can be considered as 100%. Most powders in SLS process are cheaper, so the cost of SLS model is also lower.

但是，选择性激光烧结工艺的缺点也比较突出，具体如下：

However, the disadvantages of selective laser sintering process are also prominent, as follows:

选择性激光烧结快速成型工艺原型表面粗糙

Surface roughness of prototype in selective laser sintering rapid prototyping process

由于SLS工艺的原材料是粉状的，原型的建造是由材料粉层经过加热熔化而实现逐层粘接的，因此，原型表面严格讲是粉粒状的，因而表面质量不高。

Since the raw materials of SLS process are powdery and the prototype is built by heating and melting the material powder layer to realize layer by layer bonding, the prototype surface is strictly powdery, so the surface quality is not high.

选择性激光烧结快速成型工艺烧结过程挥发异味

Selective laser sintering rapid prototyping process volatile odor in sintering process

SLS工艺中的粉层粘接是需要激光能源使其加热而达到熔化状态，高分子材料或者粉粒在激光烧结熔化时一般要挥发异味气体。

The powder layer bonding in SLS process requires laser energy to heat it to reach the melting state. Polymer materials or powder particles generally volatilize peculiar smell gas during laser sintering and melting.

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