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Method for manufacturing iron-based alloy part

A technology for iron-based alloys and parts is applied in the field of preparing iron-based alloy parts and iron-based alloy parts, which can solve the problems of unsuitable industrial mass production shape, single product form, product design restrictions, etc. High dimensional accuracy, low cost of fabrication process, and the effect of addressing limitations and deficiencies

Inactive Publication Date: 2015-10-14
YUXI DAHONGSHAN MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems faced in the current production process of iron-based alloy parts, such as single product form, limited product design, unsuitability for industrialized mass production of products with complex shapes or high production costs, the invention proposes a method for preparing iron-based alloy parts Method to expand the application range of low-cost iron-based alloys

Method used

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  • Method for manufacturing iron-based alloy part

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) PW 75wt.%, LDPE 10wt.%, PP 10wt.%, SA 5wt.% are stirred and mixed uniformly at 140°C to prepare a binder.

[0019] (2) Mix the iron-based powder with a particle size of 20μm and the prepared binder according to the above ratio at a loading capacity of 55%, and then put it into an internal mixer at a temperature of 120°C for 1.5 hours at a stirring speed of 80r / min.

[0020] (3) After mixing, crush and granulate (no special requirements for particle size), and inject on an injection molding machine with an injection temperature of 120°C and an injection pressure of 150MPa. The holding pressure is 100MPa and the holding time is 5s. The required shape of the injection blank.

[0021] (4) Heat the injection billet to 100°C at a heating rate of 1°C / min for 1 hour, then heat it to 300°C at 1.5°C / min for 30 minutes to perform thermal degreasing.

[0022] (5) Put the degreased iron-based sample in a sintering furnace, first heat up to 700°C for pre-sintering, at a heating rate of ...

Embodiment 2

[0025] (1) PW 70wt.%, LDPE 20wt.%, PP 7wt.%, SA 3wt.% are stirred and mixed uniformly at 150°C to prepare a binder.

[0026] (2) Mix the iron-based powder with a particle size of 30μm and the prepared binder according to the above ratio at a loading amount of 60%, and then put it into an internal mixer at a temperature of 140°C for 1 hour, and the stirring speed is 100r / min.

[0027] (3) After the mixing is completed, crush and granulate, and inject on an injection molding machine with an injection temperature of 130°C and an injection pressure of 160MPa. The holding pressure is 110MPa and the holding time is 6s to obtain an injection blank of the desired shape.

[0028] (4) Heat the injection billet to 180°C at a rate of 1.5°C / min for 1.5 hours, and then heat up to 400°C at 1.5°C / min for 45 minutes to perform thermal degreasing.

[0029] (5) Put the degreased iron-based sample in a sintering furnace, firstly heat up to 800°C for pre-sintering at a heating rate of 1°C / min and holding ...

Embodiment 3

[0031] (1) PW 65wt.%, LDPE 15wt.%, PP 15wt.%, SA 5wt.% are stirred and mixed uniformly at 130°C to prepare a binder.

[0032] (2) Mix the iron-based powder with a particle size of 25μm and the prepared binder according to the above ratio at a loading capacity of 65%, and then put it into an internal mixer at a temperature of 150℃ for mixing for 1 hour. The stirring speed is 110r / min.

[0033] (3) After the mixing is completed, crush and granulate, and inject on an injection molding machine with an injection temperature of 110°C and an injection pressure of 140MPa. The holding pressure is 100MPa and the holding time is 6s to obtain an injection blank of the desired shape.

[0034] (4) Heat the injection billet to 150°C at a heating rate of 1°C / min for 1 hour, and then heat up to 300°C at 2°C / min for 45 minutes to perform thermal degreasing.

[0035] (5) Put the degreased iron-based sample in a sintering furnace, firstly heat up to 800°C for pre-sintering, the heating rate is 1°C / min, a...

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Abstract

The invention relates to a method for manufacturing an iron-based alloy part and belongs to the technical field of iron-based alloy forming. According to the method for manufacturing the iron-based alloy part, a powder injection forming technology is adopted; firstly, metal and polymer binder powder are mixed into even injection forming feed with viscoplasticity; then, injection is conducted on an injection machine so that an injection blank can be formed; afterwards, the iron-based alloy part is manufactured through the steps of degreasing, sintering and the like. The finished iron-based alloy part product which is good in performance and high in size precision is obtained after heat treatment is conducted on the sintered product. The method for manufacturing the iron-based alloy part has the advantages that the product is formed with a net dimension, subsequent machining is not needed, the production cost is low, and iron-based alloy part products which are complex in shape and good in comprehensive performance can be produced in a batched mode; and the method is suitable for industrial production.

Description

Technical field [0001] The invention relates to a method for preparing iron-based alloy parts and belongs to the technical field of iron-based alloy forming. In particular, a new method for preparing iron-based alloy parts is suitable for industrialized mass production of iron-based alloy parts with high precision, complex shapes and excellent performance. Background technique [0002] Iron-based composites contain iron, a cheap and abundant raw material, and have a wide range of applications in engineering. For structural parts such as engine parts that operate under high temperature, high speed, and wear-resistant conditions, iron-based composite materials can not only meet their work needs, but also have higher cost performance than aluminum-based and magnesium-based composite materials. Therefore, considering the economic cost and practical application effects, the research of iron-based composite materials is of great significance. [0003] At present, the preparation method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22B22F5/00
Inventor 杨雪峰王平刘晓红罗锐吴继云
Owner YUXI DAHONGSHAN MINING
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