挤出机螺杆与机筒：

Single screw and barrel of extruder machine

规格：

直径：φ15～φ300

长径比:L/D=15～55

Standards：

Diameter:φ15-φ300

Ratio of Length to Diameter :15～55

材料：

优质合金钢

(1) 38CrMoAlA (JIS SACM645)

(2) 42CrMo (AISI 4140)      

(3) 4Cr5MoSiV1 (JIS SKD-61)

Material:

Alloy-Steel of High-quality

(1) 38CrMoAlA (JIS SACM645)

(2) 42CrMo (AISI 4140)      

(3) 4Cr5MoSiV1 (JIS SKD-61)

热处理：

(1)渗氮处理

(2)电镀硬铬层

(3)高频淬火

(4)喷涂双金属合金层

（5）真空淬火

Heat-treatment:

（1）       Nitriding treatment

（2）       Electroplated hard-chrome

（3）       High-frequency quenching

（4）       Spray coating Bimetallic-alloy

（5）       Vacuum quenching

主要技术指标：

调制硬度：240～280HV

氮化硬度：900～1020HV

氮化层深度：0.5～0.8mm

氮化脆性：≤二级

表面粗糙度：Ra0.4um/m

螺杆直线度：0.015mm/m

氮化后表面镀硬铬度：≥900HV

镀铬层厚度：0.05～0.10mm

双合金硬度：HRC56°～65°（合金采用镍基合金）

 合金深度：0.8～2.0mm

Main technical specifications::

Technical: Nitriding treatment, alloy coating spraying, heating treatment, screw fully hardening,

Hardness After Hardening & Tempering : 240-280 HV

Nitrided Hardness : 900-1020 HV

Nitrided Case Depth: 0. 5~0.8mm

Nitrided Brittleness: Less Than Grade 2

Surface Roughness: Ra 0.4um/m

Screw Straightness: 0.015mm/m

Surface Chromium-Plating''s Hardness After Nitriding:≥900HV

Chromium-Plating Depth: 0.05~0.10mm

Alloy Hardness: HRC50°-65°

Alloy Depth: 0.8~2.0mm

螺杆可选用普通型、渐变型、突变型、销钉型、屏障型、排气型等。

螺杆的压缩比根据不同的原料设计，也可按用户要求进行设计。

Screw can be selected from ordinary,gradual,mutational,pinned,shielding,separating and exhausting types.

The compression ratio of screw can be desingned according to different raw material-s and requirements of clients.