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Iron-base alloy double-screw integral alloy lining and preparing method thereof

An iron-based alloy, twin-screw technology, applied in the field of twin-screw extruders, can solve the problems of long downtime, high use/maintenance cost of twin-screw extruders, short service life, etc., to meet the requirements of wear resistance and corrosion resistance. Performance requirements, reducing equipment use costs and downtime losses, and improving corrosion resistance

Active Publication Date: 2017-10-20
苏州艾盾合金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor wear resistance and short service life of the double alloy integral sleeve, it cannot meet the increasing high-quality and long service life requirements of the existing twin-screw extruder. High operating / maintenance costs for twin-screw extruders
[0004] Iron-based alloy materials have the characteristics of high hardness, corrosion resistance, wear resistance, and heat resistance. The existing applications are mainly oxyacetylene spray welding, plasma welding, supersonic spray welding or laser overlay welding. Due to its high hardness characteristics, it is difficult to cut, which limits the application range of iron-based alloys to a certain extent.
In addition, the inventor made the iron-based alloy in the prior art into an alloy bushing through high-cost processing technology, and the related additives in the polymer extruded material are easy to wear and corrode the alloy bushing. Therefore, the existing iron-based alloy The wear resistance and corrosion resistance still need to be further improved

Method used

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  • Iron-base alloy double-screw integral alloy lining and preparing method thereof
  • Iron-base alloy double-screw integral alloy lining and preparing method thereof
  • Iron-base alloy double-screw integral alloy lining and preparing method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1 The preparation of an iron-based alloy twin-screw integral alloy bushing comprises the following steps:

[0037] (1) According to the requirements of the design drawings, the Figure 1-2 The mold shape, inner cavity, base plate, and inner mold are processed in place by wire cutting, and the dimensional accuracy is controlled within 0.05mm to ensure the accuracy of the blank margin after sintering, and then the base plate and the shape are fixed by positioning welding;

[0038] (2) Clean the mold shell and the inner mold, brush a layer of high-temperature release agent on the mold surface after drying and dry it, then insert the dried mold inner core according to the position of the positioning hole and fix the position;

[0039](3) By weight percentage: B:1.00, C:0.80, Cr:5.00, Ni:9.00, Si:2.00, Fe surplus, iron-based alloy powder is filled in the mold cavity and shaken;

[0040] (4) Put the above-mentioned mold filled with iron-based alloy powder into a v...

Embodiment 2

[0043] Embodiment 2 The preparation of the iron-based alloy twin-screw integral alloy bushing comprises the following steps:

[0044] (1) According to the requirements of the design drawings, the Figure 1-2 The mold shape, inner cavity, base plate, and inner mold are processed in place by wire cutting, and the dimensional accuracy is controlled within 0.05mm to ensure the accuracy of the blank margin after sintering, and then the base plate and the shape are fixed by positioning welding;

[0045] (2) Clean the mold shell and the inner mold, brush a layer of high-temperature release agent on the mold surface after drying and dry it, then insert the dried mold inner core according to the position of the positioning hole and fix the position;

[0046] (3) By weight percentage: B: 3.50, C: 2.00, Cr: 15.00, Ni: 15.00, Si: 3.00, W: 0.10, Fe surplus, iron-based alloy powder is filled in the mold cavity and shaken;

[0047] (4) Put the above-mentioned mold filled with iron-based all...

Embodiment 3

[0050] Embodiment 3 The preparation of an iron-based alloy twin-screw integral alloy bushing comprises the following steps:

[0051] (1) According to the requirements of the design drawings, the Figure 1-2 The mold shape, inner cavity, base plate, and inner mold are processed in place by wire cutting, and the dimensional accuracy is controlled within 0.05mm to ensure the accuracy of the blank margin after sintering, and then the base plate and the shape are fixed by positioning welding;

[0052] (2) Clean the mold shell and the inner mold, brush a layer of high-temperature release agent on the mold surface after drying and dry it, then insert the dried mold inner core according to the position of the positioning hole and fix the position;

[0053] (3) By weight percentage: B: 1.50, C: 0.80, Cr: 6.00, Ni: 10.00, Si: 3.50, W: 1.00, Fe surplus, iron-based alloy powder is filled in the mold cavity and shaken;

[0054] (4) Put the above-mentioned mold filled with iron-based alloy...

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Abstract

The invention discloses an iron-base alloy double-screw integral alloy lining and a preparing method thereof. The iron-base alloy double-screw integral alloy lining is formed through integral sintering of cobalt-base alloy powder. The nickel-base alloy powder comprises, by weight percent, 1.50%-3.00% of B, 0.80%-1.60% of C, 6.00%-12.00% of Cr, 8.00%-16.00% of Ni, 2.00%-3.50% of Si, 0.00%-3.00% of W and the balance Fe. The unique machining technology process is adopted in the method, the traditional technology manner of the lining and machine barrel combination is innovated, the hardness of a sintered iron-base alloy lining is HRC58-65, the abrasion resisting performance is 4-7 times of the abrasion resisting performance of 6542 materials, the service life of the lining is effectively prolonged, the production cost is reduced, and the active demand of the market on constant product quality increasing is met.

Description

technical field [0001] The invention relates to the technical field of twin-screw extruders, in particular to an iron-based alloy twin-screw integral alloy bushing and a preparation method thereof. Background technique [0002] The existing integrated inner bushing for screw extruder has no composite alloy structure and is an integral structural bushing. Its main production materials are high-chromium cast iron, high-alum cast iron, W6Mo5Cr4V2 high-speed steel (tool steel), hot isostatic pressed iron In terms of structure, although the integral inner bushing solves the joint gap problem at the joint of the C-type / O-type split composite alloy bushing, its service life is longer than that of the C-type / O-type split composite alloy inner bushing. The bushing has been improved, but due to the specific use environment of the twin-screw extruder, there are relatively strict technological requirements for the matching gap between the bushing and the screw in the cylinder, that is, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54C22C38/56C22C38/44C22C38/34C22C38/02C22C33/02B22F3/02B22F3/10B22F5/10
CPCB22F3/02B22F3/10B22F5/10C22C33/0285C22C38/02C22C38/34C22C38/44C22C38/54C22C38/56
Inventor 彭刚君康建明郭桃元
Owner 苏州艾盾合金材料有限公司
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