Alloy screw material and production technology of screws by adopting material

A production process and screw technology, applied in the field of alloy screw material and screw production technology, can solve the problems of unsolved cracks, short service life, falling off of the alloy layer, etc., and achieve high fracture toughness and wear resistance. Excellent performance and good flexural strength

Active Publication Date: 2014-05-07
东莞杰宇机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, neither the coated alloy screw process nor the process of spraying the Co+Cr+Wc alloy layer on the surface of the screw can solve the problem of alloy layer shedding well.
Because the expansion systems of the two materials are inconsistent, the resulting cracks cannot be well resolved, so the cost of popularization and application is relatively high
And it is prone to polarization, that is, the service life of the qualified quality will be longer, and the service life of the unqualified quality control will be very short. Often it will cause the alloy layer to fall off, twist and other defects after a few days of use.

Method used

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  • Alloy screw material and production technology of screws by adopting material
  • Alloy screw material and production technology of screws by adopting material
  • Alloy screw material and production technology of screws by adopting material

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0033]First, according to the length of the alloy screw to be produced, a pipe with a carbon content of less than 0.25% and a wall thickness of 5 mm in diameter is selected as the pipe sleeve 1 of the mold, preferably low-carbon steel, and the inner hole of the pipe is processed, and the inner surface of the pipe sleeve 1 Form 60 ° chamfering at two ports, then, process a non-porous plug 4 and a holed plug 3 with a diameter of 1.5mm through hole 31 in the center, both of which are 3mm in height, and are formed at one end with 60 ° chamfering and chamfering, the other end of the plug with holes 3 and the plug without holes 4 also forms a vertical surface, the height of the vertical surface is 1mm, the next step is to make a core rod 21 and a core handle 22 The mandrel 2, the front end of the mandrel 21 is arc-shaped, to avoid the radial contraction of the mandrel 21 when pressing the pre-sintered blank, to ensure the yield rate of the alloy screw, the lengths of the mandrel 21 a...

specific Embodiment 2

[0039] First of all, according to the length of the alloy screw to be produced, a pipe with a carbon content of less than 0.25% and a wall thickness of 6.5mm in diameter is selected as the pipe sleeve 1 of the mold, preferably low carbon steel, and the inner hole of the pipe is processed, and placed in the pipe sleeve 1 Form 60 ° of chamfers at the two ports of the side, and then, process a non-porous plug 4 and a plug 3 with holes provided with a through hole 31 with a diameter of 2 mm in the center. 60 ° chamfering and chamfering, the other end of the plug with holes 3 and the plug without holes 4 also forms a vertical surface, the height of the vertical surface is 1mm, the next step is to make a core rod 21 and a core handle 22 The mandrel 2, the front end of the mandrel 21 is arc-shaped, to avoid the radial contraction of the mandrel 21 when pressing the pre-sintered blank, to ensure the yield rate of the alloy screw, the lengths of the mandrel 21 and the mandrel 22 are res...

specific Embodiment 3

[0045] First of all, according to the length of the alloy screw to be produced, a pipe with a carbon content of less than 0.25% and a wall thickness of 5.4 mm in diameter is selected as the pipe sleeve 1 of the mold, preferably low carbon steel, and the inner hole of the pipe is processed, and placed in the pipe sleeve 1 A 60° chamfer is formed at the two ports on the side, and then, a non-porous plug 4 and a holed plug 3 with a through hole 31 of diameter 3.5 mm in the center are processed. Form the chamfer matched with the 60° chamfering inclined surface, the other end of the plug with hole 3 and the plug without hole 4 is also formed with a vertical surface, the height of the vertical surface is 1mm, the next step is to make a core rod 21 and a core The mandrel 2 of the handle 22, the front end of the mandrel 21 is arc-shaped, to avoid the radial contraction of the mandrel 21 when pressing the pre-sintered billet, to ensure the yield rate of the alloy screw, the length of th...

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Abstract

The invention relates to the technical field of injection screw production, and discloses an alloy screw material and a production technology of screws by adopting the material. The alloy screw material is prepared from the following raw material powder: 20-60% of Mo, 10-40% of FeB, 5-20% of Cr, 2-30% of Ni, 1-7% of Mn, 0.1-1% of C, and the balance of Fe. The production technology comprises the steps of die preparation, raw material preparation, blank pressing (isostatic cool pressing / die pressing), blank making (hot isostatic pressing / vacuum furnace sintering, normalizing treatment, and processing and molding. The alloy screw material provided by the invention is high in hardness, excellent in bending strength, high in breaking tenacity, excellent in abrasive resistance, and excellent in corrosion resistance, and the density of the material is close to that of a steel body ; the production technology for producing alloy screws by adopting the material is adopted, so that the plastic molding is more stable, the yield ratio for producing the alloy screws is greatly increased, and the long-term stability of injection screws during production is guaranteed.

Description

technical field [0001] The invention relates to the technical field of injection molding extrusion and granulation screw production, in particular to an alloy screw material with ternary boride-based cermet components and a production process for the screw. Background technique [0002] In the existing field of plastic molding screw production, under the premise that the comprehensive performance requirements of plastic products are getting higher and higher, and under the situation that special injection molding is becoming more and more popular, injection molding is in the process of screw plasticization, engineering plastics, powder metallurgy injection, ceramics Injection molding, magnet iron powder, bakelite, BMC and other severe wear and corrosion fields have caused severe wear and corrosion to the screw, such as 90% magnet powder, 65% fiber, PPS+65% fiber, high environmental protection, For plastic molding under high flame-retardant conditions, the service life of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54C22C38/58C22C27/04B22F3/16B22F5/06B23P15/00B29C45/62B29C47/60B29C48/38
CPCB29C47/50B29C48/509B29C48/38
Inventor 邓俊杰
Owner 东莞杰宇机械有限公司
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