High strength lead alloy and manufacturing method thereof

A lead alloy, high-strength technology, applied in the field of shielding lead alloy materials and its preparation, can solve the adverse effects of alloy ductility and impact resistance, poor mechanical strength and heat resistance of composite materials, and it is difficult to prepare large-scale composite materials Materials and other issues to achieve the effect of improving the surrounding international environment, supporting domestic economic construction, and increasing international influence

Inactive Publication Date: 2009-07-08
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polyethylene is a polymer substance with a melting point of only 130°C, which leads to poor mechanical strength and heat resistance of the composite material. Its tensile strength is usually only about 10MPa, and the Brinell hardness is only 3-4HBS, which is serious. It restricts its application; boron steel is a neutron absorbing material, but the addition of boron has an adverse effect on the ductility and impact resistance of the alloy; B 4 C / Pb composite material is the combination of Pb-Sb alloy and B 4 C is directly hot-pressed and composited. Although it can be used as a material for absorbing neutrons and shielding γ-rays, its strength and plasticity are low. Its tensile strength is 48.2MPa and Brinell hardness is 22.13HBS. It is difficult to prepare large-scale composites. material; 4 C / Al composite material can be used as thermal neutron absorbing material, but it cannot block γ-rays, affecting its shielding effect, and there is B 4 C Homogenization and Its Interfacial Bonding with Aluminum Matrix

Method used

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  • High strength lead alloy and manufacturing method thereof
  • High strength lead alloy and manufacturing method thereof
  • High strength lead alloy and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Embodiment 1: Adopt in-situ reaction method, add 50% lead, 40% Ba, Ca, Li, Mg, Pd, Pt or Dy, La, Y, Gd and other second component metals and 10 in the induction electric furnace % Al, the adding sequence is: first add the second component metal with a higher melting point, and then add lead with a lower melting point after it is melted. Stir for 1-2 minutes to make the magnesium and lead fully react to form a lead-rich intermetallic compound, stand still for 2 minutes, and cast by bottom casting, and finally prepare an ultra-high-strength lead alloy material. And make test samples for testing and analysis of mechanical properties and microstructure. The test results are as follows:

[0016] ①Tensile strength test: Prepare a test sample rod and carry out the tensile strength test on the tensile mechanical testing machine. The test results show that the tensile strength of the ultra-high-strength lead alloy reaches 228MPa, which is 10-15MPa of the traditional lead and le...

Embodiment 2

[0019] Embodiment 2: Adopt in-situ reaction method, add 55% lead, 40% Ba, Ca, Li, Mg, Pd, Pt or Dy, La, Y, Gd and other second component metals and 5 in the induction electric furnace % Al, the adding sequence is: first add the second component metal with a higher melting point, and then add lead with a lower melting point after it is melted. Stir for 1-2 minutes to make the magnesium and lead fully react to form a lead-rich intermetallic compound, stand still for 2 minutes, and cast by bottom casting, and finally prepare an ultra-high-strength lead alloy material. And make test samples for testing and analysis of mechanical properties and microstructure. The test results are as follows:

[0020] ①Tensile strength test: Prepare a test sample bar for tensile strength test on a tensile mechanical testing machine. The test results show that the tensile strength of ultra-high-strength lead alloy reaches 154MPa, which is more than 7 times that of traditional lead and lead alloy ....

Embodiment 3

[0023] Embodiment 3: adopt the in-situ reaction method, add 60% lead, 40% Ba, Ca, Li, Mg, Pd, Pt or Dy, La, Y, Gd and other second component metals in the induction furnace, add The sequence is: first add the second component metal with a higher melting point, and then add lead with a lower melting point after it is melted. Stir for 1-2 minutes to make the magnesium and lead fully react to form a lead-rich intermetallic compound, stand still for 2 minutes, and cast by bottom casting, and finally prepare an ultra-high-strength lead alloy material. And make test samples for testing and analysis of mechanical properties and microstructure. The test results are as follows:

[0024] ①Tensile strength test: Prepare a test sample bar and conduct a tensile strength test on a tensile mechanical testing machine. The test results show that the tensile strength of the ultra-high-strength lead alloy reaches 103MPa, which is about 5 times that of traditional lead and lead alloys. .

[00...

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Abstract

The invention belonging to a nuclear screening composite material for nuclear energy development and a preparation technique thereof provides a high-strength lead alloy and a method for preparing the same.The method comprises steps of melting the second group component metal, adding metallic lead, stirring for performing reaction in-situ, and then the second group component metal and the blue lead generating an intermetallic compound combined by hybrid bonds of metallic bond and covalent bond. The strength of lead alloy is greatly improved by using the intermetallic compound generated by the reaction of lead and the second group component metal and using the excellent high-strength character of the intermetallic compound. The ultrahigh strength lead alloy prepared by using the technology possesses enough mechanics bearing capacity at the same time of maintaining excellent gamma-ray and X-beam shielding character, and thus the material has a shielding function/structure integrated character, and it is hopeful to further improved the combination property of nuclear screening materials.

Description

technical field [0001] The invention relates to a shielding lead alloy material used in nuclear shielding facilities and a preparation method thereof, in particular to a preparation method of a shielding material with high strength and light weight. Background technique [0002] With the advancement of science and technology, the application field of nuclear energy is expanding day by day, and the requirements for shielding materials are getting higher and higher, such as comprehensive shielding materials resistant to multiple rays; with light weight, high strength, small size, and a structure that can be combined and welded Type multifunctional shielding material. [0003] However, among existing shielding materials, concrete is heavy, poor in mobility, and complex in composition. [0004] Lead has the strongest absorption and scattering of gamma rays, and can shield primary and secondary gamma rays, and lead will not become a second source of radiation. At the same time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C11/00C22C1/02
Inventor 孙勇段永华竺培显
Owner KUNMING UNIV OF SCI & TECH
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