Preparation method of tungsten alloy beads

A tungsten alloy and bead pressing technology, applied in metal processing equipment, transportation and packaging, packaging by pressurization/gasification, etc., can solve the problem of limiting the overall production efficiency of tungsten alloy beads, poor crushing performance of tungsten alloy beads, The problem of large demand for alloy beads can solve the bottleneck of sintering capacity, improve fluidity, improve molding quality and production efficiency.

Pending Publication Date: 2022-06-24
XIAN HUASHAN TUNGSTEN PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Tungsten alloy beads are often produced by powder metallurgy. However, due to the small size and high density of tungsten alloy powder, tungsten alloy beads are easily affected by the fluidity of the powder during pressing, resulting in fluctuations in the single weight and size of the compact, and are restricted during sintering. In the way of boating, the sintering capacity limits the overall production efficiency of tungsten alloy beads, and the work hardening in the grinding process after sintering leads to the deterioration of the crushing performance of tungsten alloy beads, which is different from the large demand and performance requirements of tungsten alloy beads. High contradictions are increasingly prominent

Method used

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  • Preparation method of tungsten alloy beads
  • Preparation method of tungsten alloy beads
  • Preparation method of tungsten alloy beads

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment includes the following steps:

[0038] Step 1. Add cobalt element to tungsten alloy powder to obtain tungsten alloy bead raw material mixed powder; the tungsten alloy powder is composed of the following elements in mass content: W 93%, Ni 4.9%, Fe 2.1%, tungsten alloy bead raw material The mass content of cobalt element in the mixed powder is 0.35%;

[0039] Step 2: Mixing the tungsten alloy bead raw material mixed powder obtained in Step 1 with glue and granulating, and then sieving and grading with standard meshes including 80 meshes, 100 meshes and 120 meshes to obtain +80 meshes, -80 meshes~ +100 mesh, -100 mesh ~ +120 mesh and -120 mesh four particle size grades; the different particle size grades are divided into plastic bags according to the particle size grade, and filled with nitrogen for protection, and each bag The weight of the pellets shall not exceed 20kg;

[0040] Step 3: Press and shape the granulated materials obtained in step 3 with s...

Embodiment 2

[0046] This embodiment includes the following steps:

[0047] Step 1. Add cobalt element to tungsten alloy powder to obtain tungsten alloy bead raw material mixed powder; the tungsten alloy powder is composed of the following elements in mass content: W 93%, Ni 4.9%, Fe 2.1%, tungsten alloy bead raw material The mass content of cobalt element in the mixed powder is 0.3%;

[0048] Step 2: Mixing the tungsten alloy bead raw material mixed powder obtained in Step 1 with glue and granulating, and then sieving and grading with standard meshes including 80 meshes, 100 meshes and 120 meshes to obtain +80 meshes, -80 meshes~ +100 mesh, -100 mesh ~ +120 mesh and -120 mesh four particle size grades; the different particle size grades are divided into plastic bags according to the particle size grade, and filled with nitrogen for protection, and each bag The weight of the pellets shall not exceed 20kg;

[0049] Step 3: Press and shape the granulated materials obtained in step 3 with st...

Embodiment 3

[0055] This embodiment includes the following steps:

[0056] Step 1. Add cobalt element to tungsten alloy powder to obtain tungsten alloy bead raw material mixed powder; the tungsten alloy powder is composed of the following elements in mass content: W 95%, Ni 3.5%, Fe 1.5%, tungsten alloy bead raw material The mass content of cobalt element in the mixed powder is 0.25%;

[0057] Step 2: Mixing the tungsten alloy bead raw material mixed powder obtained in Step 1 with glue and granulating, and then sieving and grading with standard meshes including 80 meshes, 100 meshes and 120 meshes to obtain +80 meshes, -80 meshes~ +100 mesh, -100 mesh ~ +120 mesh and -120 mesh four particle size grades; the different particle size grades are divided into plastic bags according to the particle size grade, and filled with nitrogen for protection, and each bag The weight of the pellets shall not exceed 20kg;

[0058] Step 3: Press and shape the granulated materials obtained in step 3 with s...

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Abstract

The invention discloses a preparation method of tungsten alloy beads, which comprises the following steps of: 1, adding cobalt element into tungsten alloy powder to obtain tungsten alloy bead raw material mixed powder; 2, mixing the tungsten alloy bead raw material mixed powder with glue, granulating, and then screening and grading to obtain granulated materials with different particle size grades; thirdly, the granulation materials of different particle size grades are formed according to the same particle size grade, and tungsten alloy bead pressed blanks are obtained; 4, thermally degreasing the tungsten alloy bead pressed blank; 5, sintering to obtain a tungsten alloy bead sintered blank; and 6, grinding the tungsten alloy bead sintered blank, and carrying out stress relief annealing treatment to obtain the tungsten alloy bead. The cobalt element is added into the tungsten alloy powder, the wettability of tungsten particles is improved, the sintering activity is improved, through glue mixing granulation and screening classification, the flowability of granulation materials is improved, the piece weight and size fluctuation of tungsten alloy bead compacts is reduced, hot degreasing and stress relief annealing are combined, compact damage and performance deterioration are avoided, and the quality of the tungsten alloy beads is improved. And the forming quality and the production efficiency of the tungsten alloy beads are improved.

Description

technical field [0001] The invention belongs to the technical field of tungsten alloy material manufacturing, and particularly relates to a preparation method of tungsten alloy beads. Background technique [0002] Tungsten alloy beads are tungsten alloy products used for weights or lethal parts. They are known as the smallest high-density balls in the field of tungsten alloys. They are widely used in many fields, such as golf club balls, fishing weights, military Defense balance, etc. In particular, tungsten alloy beads have the advantages of high density, good storage speed and strong armor-piercing ability, and have been widely used in killing warheads in recent years. [0003] Tungsten alloy beads are often produced by powder metallurgy. However, due to the small size of tungsten alloy beads and the high density of tungsten alloy powder, they are easily affected by the fluidity of the powder during pressing, resulting in the phenomenon of fluctuations in the unit weight ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/00B22F1/14B22F3/02B22F3/10B22F3/24C22C27/04C22F1/18B65B31/04
CPCB22F5/00C22C27/04C22F1/18B22F3/02B22F3/1021B22F3/24B65B31/04B22F2003/247B22F2003/248
Inventor 赵永华罗旭张广卫翁红卫潘王虎彭媛张磊白磊
Owner XIAN HUASHAN TUNGSTEN PROD CO LTD
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