High-strength flame resistant magnesium alloy

A magnesium alloy, flame-retardant technology, applied in the field of high-strength flame-retardant magnesium alloy, can solve the problems of low absolute strength, easy to ignite, light weight, low cushioning properties, etc., and achieve the effect of high tensile strength

Inactive Publication Date: 2009-08-19
NAT INST OF ADVANCED IND SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although titanium and aluminum alloys have sufficient strength, they have disadvantages such as light weight and cushioning properties compared to magnesium alloys.
[0003] It has been known in the past that although ordinary magnesium alloys have relatively high specific strength, compared with titanium and aluminum alloys, they have lower absolute strength and have the disadvantage of being easy to ignite due to their low ignition point.

Method used

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  • High-strength flame resistant magnesium alloy
  • High-strength flame resistant magnesium alloy
  • High-strength flame resistant magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The alloy of this example is based on a flame-retardant magnesium alloy "AM60B+2Ca" to which 2.0% by mass of Ca is added to impart flame retardancy to the AM60B alloy. C, Mo, Nb, Si, W, Al were added as additional additives so as to achieve the composition shown in Table 1 2 o 3 , Mg 2 Si, SiC element or compound. In the present example, cutting chips belonging to turning chips were used as flake-like lumps of the alloy. The cutting chips were pulverized with a ball mill to obtain a pulverized product. At this time, additional additives are also added at the same time, and the additives are homogeneously dispersed and compounded.

[0082] Next, the pulverized material of the flame-retardant magnesium alloy prepared by the ball mill was solidified in the air at a sintering temperature of 480° C. for 20 minutes by a pulse current sintering method. Next, hot extrusion processing was performed using this as a billet at an extrusion ratio of 110 and an extrusion tempera...

Embodiment 2

[0097] This example shows that the Figure 1 to Figure 8 Joining results when the shown high-strength flame-retardant magnesium alloy is used as a welding wire of a solder for magnesium alloy welding. For the workpiece to be welded, an extruded sheet (2 mm in thickness) of a flame-retardant magnesium alloy "AM60B+2Ca alloy" to which 2% by mass of calcium was added to AM60B magnesium alloy for imparting flame retardancy was used. Welding by TIG method. The main welding conditions are as follows.

[0098] That is, a pure tungsten electrode with a diameter of 2.4mm is used, the distance between the electrode and the base metal is 2mm, the alternating current is 100A, the welding speed is 200mm / min, the inert gas is argon, and the flow rate is 12L / min. After welding, excess welding was removed to form a test piece shape, and a tensile strength test was performed to confirm the joint strength. This tensile strength test result is shown in table 3, Figure 9 and Figure 10 . ...

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Abstract

A high-strength flame resistant magnesium alloy produced by adding, as a supplement additive, at least one member selected from among carbon (C), molybdenum (Mo), niobium (Nb), silicon (Si), tungsten (W), alumina (Al2O3), magnesium silicide (Mg2Si) and silicon carbide (SiC) to a small-piece block of flame resistant magnesium alloy resulting from addition of 0.5 to 5.0 mass% of calcium to a magnesium alloy, and subjecting the resultant matter to crushing, molding, sintering and plastic working. As the high-strength flame resistant magnesium alloy excels in joining capability, when it is applied to a filler metal, there can be attained an enhancement of weldability.

Description

technical field [0001] The present invention relates to a high-strength flame-retardant magnesium alloy in which the mechanical strength of the flame-retardant magnesium alloy is improved. Background technique [0002] Magnesium alloys are attracting attention as alternatives to aluminum and its alloys due to their extremely light weight. Magnesium alloy is the lightest among practical metals, and the specific strength and specific elastic modulus obtained by dividing the strength and elastic modulus by the density are quite high. Therefore, it is expected that the demand for it will continue to increase in the future in industrial fields requiring weight reduction. Although titanium and aluminum alloys have sufficient strength, they have disadvantages in that they are inferior in characteristics such as light weight and cushioning properties compared to magnesium alloys. [0003] Conventionally, it has been known that ordinary magnesium alloys have a relatively high speci...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/02C22C23/04C22C32/00
Inventor 佐藤富雄上野英俊小川洋司
Owner NAT INST OF ADVANCED IND SCI & TECH
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