MIM manufacturing process of 17-4 PH linear multiple-cavity reactive fragment shell

A manufacturing process and linear technology, which is applied in the field of MIM manufacturing process of 17-4PH linear multi-chamber shell with energetic fragments, can solve the problems of degreasing defects, reduced yield, poor dimensional accuracy, etc., and achieves good surface finish and high density. , the effect of high dimensional accuracy

Active Publication Date: 2020-04-10
广州赛隆增材制造有限责任公司
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the traditional metal injection molding practice, due to the unreasonable setting of process parameters, the product is prone to injection defects, degreasing defects, low mechanical strength of sintered products, poor dimensional accuracy, waste of resources, etc., and it is difficult to form thin walls. Parts will not only reduce the yield, but also cause some unnecessary waste of resources. Therefore, it is necessary to optimize the metal injection molding process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The invention relates to a MIM manufacturing process of a 17-4PH linear multi-cavity energetic fragment shell, comprising the following steps:

[0037] Step 1. Preparation of powder for injection molding: First, put the gas-atomized and water-atomized 17-4PH stainless steel powder with a particle size of 17 μm in a double-motion mixer with a mass ratio of 3.5:1 and mix evenly to form 17-4PH stainless steel powder. .

[0038] Step 2. Preparation of injection feed: Mix the 17-4PH stainless steel powder obtained in step 1 with the binder at a mass ratio of 12:1, then knead and granulate to obtain injection feed. The binder is a wax-based binder, which is composed of the following raw materials in parts by weight: 45 parts of paraffin wax, 12.5 parts of high-density polyethylene, 7.5 parts of polypropylene, 3.5 parts of stearic acid, 7.5 parts of polystyrene and 25 parts part microcrystalline wax.

[0039] Step 3, preparing the injection molded base: heating the injection...

Embodiment 2

[0048] The invention relates to a MIM manufacturing process of a 17-4PH linear multi-cavity energetic fragment shell, comprising the following steps:

[0049] Step 1. Preparation of powder for injection molding: First, put the gas-atomized and water-atomized 17-4PH stainless steel powder with a particle size of 15 μm in a double-motion mixer with a mass ratio of 3:1 and mix evenly to form 17-4PH stainless steel powder. .

[0050] Step 2. Preparation of injection feed: Mix the 17-4PH stainless steel powder processed in step 1 with the binder at a mass ratio of 11:1, then knead and granulate to obtain injection feed. The binder is a wax-based binder, which is composed of the following raw materials in parts by weight: 40 parts of paraffin wax, 10 parts of high-density polyethylene, 5 parts of polypropylene, 2 parts of stearic acid, 5 parts of polystyrene and 20 parts part microcrystalline wax.

[0051] Step 3, preparing the injection molded base: heating the injection feed obt...

Embodiment 3

[0060] The invention relates to a MIM manufacturing process of a 17-4PH linear multi-cavity energetic fragment shell, comprising the following steps:

[0061] Step 1. Preparation of powder for injection molding: First, put the gas-atomized and water-atomized 17-4PH stainless steel powder with a particle size of 20 μm in a double-motion mixer with a mass ratio of 4:1 and mix evenly to form 17-4PH stainless steel powder. .

[0062] Step 2. Preparation of injection feed: Mix the 17-4PH stainless steel powder processed in step 1 with the binder at a mass ratio of 13:1, then knead and granulate to obtain injection feed. The binder is a wax-based binder, which is composed of the following raw materials in parts by weight: 50 parts of paraffin wax, 15 parts of high-density polyethylene, 10 parts of polypropylene, 5 parts of stearic acid, 10 parts of polystyrene and 30 parts part microcrystalline wax.

[0063] Step 3, preparing the injection molded base: heating the injection feed o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
densityaaaaaaaaaa
Login to view more

Abstract

The invention provides a MIM manufacturing process of a 17-4 PH linear multiple-cavity reactive fragment shell. The manufacturing process comprises the following steps that (1) gas atomization and water atomization 17-4 PH stainless steel powder are uniformly mixed to form 17-4 PH stainless steel powder; (2), 17-4 PH stainless steel powder and a binding agent are mixed according to the mass ratioof 11-13 : 1 and are mixed and granulated to obtain an injection feeding material; (3), the injection feeding material is heated, the flow state injection feeding material is injected into a mold forcooling and molding to obtain a blank body; (4), the blank body is placed in a degreasing tank to carry out solvent degreasing; and (5), the blank body after degreasing is carried into a vacuum furnace to carry out thermal degreasing and sintering in a protective atmosphere, and the 17-4 PH linear multiple-cavity reactive fragment shell prepared. The MIM manufacturing process of the 17-4 PH linearmultiple-cavity reactive fragment shell is reasonable in process, easy to control, low in cost and high in product density.

Description

technical field [0001] The invention relates to the technical field of metal injection molding, in particular to a MIM manufacturing process of a 17-4PH linear multi-cavity energetic fragment casing. Background technique [0002] Energetic fragments (also known as reaction fragments) are prefabricated fragments that contain chemical energy and can release energy during the impact process. The energy of the collision shock wave is used to trigger the chemical reaction of the energetic material itself. The energy released by the chemical reaction and the energy of the shock wave Superimposed on the explosives in the shielding shell, triggering its explosion damage effect. Single monolithic energetic fragments are made of energetic materials with high strength, good toughness, and high density by molding or sintering. Low, it is prone to breakage during the driving loading process. If metal is used as the shell and energetic substances are filled inside the shell, the occurre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/22B22F1/00B22F3/10B22F5/00
CPCB22F1/0007B22F3/225B22F3/1025B22F3/1007B22F5/00B22F2999/00B22F1/103B22F1/10B22F2201/02B22F2201/20
Inventor 潘彦明郭瑜汪强兵龙学湖时明军胡涵
Owner 广州赛隆增材制造有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap