陕西西安空压机知名厂

生产工艺主要分为锻造、铸造、割制、卷制这四种。

Production process consists of forging, casting, cutting, rolling the four.

铸造法兰和锻造法兰

The casting flange and forging flange

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）；

Forged flanges, the blank shape size accurate, processing capacity is small, the cost is low, but there are casting defects (porosity, crack, inclusion); Poor casting internal organization streamline (if it is cutting parts, less streamlined);

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，机械性能优于铸造法兰；

Forging flange generally lower than the casting flange carbon is not easy to rust, forging good streamline, organization is compact, mechanical performance is superior to the casting flange;

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。

Improper forging technology also can appear grain big or uneven, solidification cracking phenomenon, higher than the casting flange forging cost.

锻件比铸件能承受更高的剪切力和拉伸力。

Forging than casting can withstand the higher shear and tensile force.

铸件的优点在于可以搞出比较复杂的外形，成本比较低；

Casting advantage is that can come up with more complex shape, the cost is low;

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；

Uniform forging advantage lies in the internal organization, there is no casting in porosity, inclusions and other harmful defects;

从生产工艺流程区别铸造法兰和锻造法兰的不同，比如离心法兰就属于铸造法兰的一种。

From the casting production process difference between flange and forging flange, such as centrifugal flange is one of the casting flange.

离心法兰属于精密铸造方法生产法兰，该种铸造较普通砂型铸造组织要细很多，质量提高不少，不易出现组织疏松、气孔、沙眼等问题。

Centrifugal flange, flange belong to precision casting method to produce this kind of casting than ordinary sand mold casting to much fine organization, quality improvement, is not easy to loose organization, porosity, trachoma and other issues.

首先我们需要了解离心法兰是怎样生产制作的，离心浇铸制做平焊法兰的工艺方法及产品，其特征是该产品经过下列工艺步骤加工而成：

First of all, we need to understand how centrifugal flange production, flat welding flange centrifugal casting ingot process method and product, is characterized by the product processed through the following process steps:

①将所选原材料钢材放入中频电炉熔炼，使钢水温度达到1600－1700℃；

(1) to the selected raw materials into the intermediate frequency electric furnace steel smelting, the molten steel temperature of 1600-1600 ℃;

②将金属模具预加热到800－900℃保持恒温；

(2) the metal mold pre heated to 800-900 ℃ constant temperature;

③起动离心机，将步骤①中钢水注入步骤②中预热后金属模具；

(3) starting centrifuge, the molten steel into steps in the step (1) (2) after preheating in metal mold;

④铸件自然冷却到800－900℃保持1－10分钟；

(4) casting natural cooling to 800-900 ℃ keep 1-10 minutes;

⑤用水冷却至接近常温，脱模取出铸件。

(5) water cooled to near room temperature, stripping out the casting.