Preparation method of large slenderness ratio and high-toughness magnesium alloy capillary

A technology of large slenderness ratio and magnesium alloy, which is applied in the direction of metal extrusion control equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of coarse plate grain, low production efficiency, slow extrusion speed, etc. The effect of simple process, low cost and high plasticity index

Inactive Publication Date: 2010-06-09
HARBIN INST OF TECH AT WEIHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems of slow extrusion speed, low production efficiency, poor performance, and coarse grains of extruded rods and plates in the existing metho

Method used

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  • Preparation method of large slenderness ratio and high-toughness magnesium alloy capillary
  • Preparation method of large slenderness ratio and high-toughness magnesium alloy capillary

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The method for preparing a large slenderness ratio, high-strength and toughness magnesium alloy capillary in this embodiment is realized according to the following steps: 1. Heating the magnesium alloy ingot to 200-450°C and heat preservation treatment for 0.5-1h, and then extruding The extruding ratio is 2-64, the extruding die punch speed is 20-30mm / s, and the magnesium alloy extruded rod is obtained; 2. The magnesium alloy extruded rod is extruded at a temperature of 200-420°C. Lower annealing treatment for 2 to 8 hours, and then cut out a bar with a length of 20 to 50 mm to obtain a blank for extruded capillary; 3. Process one end of the blank for extruded capillary into a tube bottom with a thickness of 2 to 5 mm and a tube depth of 8 to 25 mm. A cylinder with an inner diameter of Φ13.6~Φ13.9mm; 4. Process the high-strength graphite into a cylinder, and carry out interference fit between the diameter of the cylinder and the inner diameter of t...

specific Embodiment approach 2

[0010] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the magnesium alloy ingot in step 1 is AZ31 magnesium alloy ingot or MB15 magnesium alloy ingot. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the extrusion is carried out under the conditions that the extrusion ratio is 10-45 and the extrusion die punch speed is 22-28 mm / s. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a large slenderness ratio and high-toughness magnesium alloy capillary, relating to a preparation method of a magnesium alloy capillary, and solving the problems of slower extruding speed, low production efficiency, poor performance, and grosser crystal grains of extruded bars and plates existing in a traditional method for preparing the magnesium alloy capillary. The method comprises the following steps of: firstly, manufacturing magnesium alloy extruded bars; secondly, manufacturing blanks for extruded capillaries; thirdly, manufacturing cylinders; fourthly, manufacturing extruded blanks; fifthly, manufacturing magnesium alloy extruded tubes; and seventhly, obtaining the large slenderness ratio and high-toughness magnesium alloy capillaries by carrying out annealing treatment and acidizing treatment on the magnesium alloy capillaries. The large slenderness ratio and high-toughness magnesium alloy capillaries obtained in the invention have uniform wall thickness, well-closed formation, high mechanical property, high elongation, tensile strength and yield strength which are measured under room temperature, fine crystal grains and large length. The invention has the advantages of high extruding speed, low cost, low consumed capacity, and greatly improved production efficiency.

Description

technical field [0001] The invention relates to a preparation method of a magnesium alloy capillary. Background technique [0002] In recent years, due to the characteristics of low density, high specific strength, high stiffness, especially good biocompatibility, low elastic modulus, magnesium alloy can be gradually degraded in the body and effectively absorbed by the human body, more and more Magnesium alloy materials are used in the development and clinical application of surgical implantation devices such as bone plates and bone screws, and medical interventional devices such as cardiovascular stents. However, the traditional processing method of magnesium alloy is thermomechanical processing, such as hot extrusion method, hot rolling method and hot drawing method. These methods all have slow extrusion speed, low production efficiency and poor performance (the elongation is lower than 10%), extruded rods, plate grains are relatively coarse (greater than 10 μm), these de...

Claims

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Application Information

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IPC IPC(8): B21C37/06B21C31/00
Inventor 于洋
Owner HARBIN INST OF TECH AT WEIHAI
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