Ti80 titanium alloy standard substance and preparation method thereof

A standard material, titanium alloy technology, applied in the field of analysis and detection, can solve the problems of lack of Ti80 titanium alloy series standard material, difficult to guarantee uniformity, difficult to achieve uniformity, etc., and achieve a reliable and easy preparation method, accurate control and guarantee. The effect of product quality

Active Publication Date: 2014-11-26
CSIC NO 12 RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the content range of the standard substance components is wider than that of the standard components, the maximum content of each element often exceeds the solid solubility of the element in the matrix material, and the uniformity is difficult to guarantee
For example, the maximum content of Al element in the standard component of Ti80 titanium alloy is 6.5%, and the maximum content of Al element in the standard substance is 7.0%. If the content of Al element exceeds 6.0%, the metal compound Ti will be precipitated. 3 Al, segregation occurs, and during the solidification process of titanium alloy, α-stable elements (mainly Al) are easy to enrich at the grain boundary, and β-stable elements Mo and Nb are easy to be depleted at the grain boundary, and the uniformity is difficult to meet the requirements of standard substances
[0008] Because it is very difficult to develop Ti80 titanium alloy series standard materials, so far, there is no Ti80 titanium alloy series standard materials at home and abroad.

Method used

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  • Ti80 titanium alloy standard substance and preparation method thereof
  • Ti80 titanium alloy standard substance and preparation method thereof
  • Ti80 titanium alloy standard substance and preparation method thereof

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preparation example Construction

[0041] The preparation method of Ti80 titanium alloy standard substance of the present invention specifically implements according to the following steps:

[0042] (1) Ingredients: The ingredients are calculated according to the content requirements of each element of the Ti80 titanium alloy standard substance, and the grade 0 sponge titanium, AlMo50 master alloy, AlNb50 master alloy, AlSi24 master alloy, sponge zirconium, pure iron, Pure aluminum and graphite are used as raw materials. The use of grade 0 sponge titanium can avoid the influence of impurities in the sponge titanium, and the selection of sponge titanium with a diameter of 3~5mm can make the distribution of the sponge titanium more uniform. Since the melting point of sponge titanium is 1668±4°C, the density is 4.51g / cm 3 ;The melting point of metal aluminum is 600°C, and the density is 2.70g / cm 3 ; The melting point of metal molybdenum is 2610°C, and the density is 10.2g / cm 3 ; The melting point of metal niobi...

Embodiment

[0053] Example, Ti80 titanium alloy standard substance and preparation method thereof, Ti80 titanium alloy standard substance Ti80-1, Ti80-2, Ti80-3, Ti80-4, Ti80-5 and Ti80-6 were prepared. Its weight components are shown in Table 1,

[0054] The specific ingredients are shown in Table 2.

[0055] 1. Preparation of Ti80-1

[0056] Concrete preparation steps are as follows:

[0057] (1) Ingredients: Calculated on the basis of 100kg of feeding material, 87.5kg of titanium sponge, 0.19kg of AlMo50 master alloy, 8.08kg of AlNb50 master alloy, 3.03kg of sponge zirconium, 0.36kg of pure iron, 0.71kg of pure aluminum and 0.13kg of graphite are taken as raw materials. The use of grade 0 sponge titanium can avoid the influence of impurities in the sponge titanium, and the selection of sponge titanium with a diameter of 3~5mm can make the distribution of the sponge titanium more uniform. Since the melting point of sponge titanium is 1668±4°C, the density is 4.51g / cm 3 ;The melting ...

Embodiment T

[0085] Table 3 embodiment Ti80 titanium alloy standard substance homogeneity

[0086]

[0087] Fixed value analysis: Use the Grubbs test criterion to test the original fixed value data to eliminate suspicious values, and then examine the normality of the data distribution. The test results are all in line with normal or quasi-normal distribution. Check whether the accuracy of each group of data is equal, after checking there is no abnormal data group, and then determine the standard value and uncertainty according to GB / T15000.3-2008.

[0088] Working curve inspection: In order to test the applicability of this set of standard materials, a set of standard materials was randomly selected, and the best conditions were selected for excitation with the ARL4460 photoelectric spectrometer to collect its light intensity, and the working curve was drawn with the standard value and light intensity. The meshing coefficients of the working curves are all above 0.99 (see Table 4 for de...

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Abstract

The invention provides a Ti80 titanium alloy standard substance. The Ti80 titanium alloy standard substance comprises the following main elements in percentage by weight: 4.3 to 7.2wt% of Al, 1.85 to 4.15wt% of Nb, 0.15 to 2.05wt% of Mo, 0.85 to 3.15wt% of Zr, 0.00 to 0.27wt% of Si, 0.00 to 0.40wt% of Fe, 0.00 to 0.14wt% of C, and the balance of Ti and other impurity elements, wherein the sum of the weight percentages of all components is a hundred percent. The preparation method comprises the following steps in sequence: compounding; pressing to form an electrode by a vertical type horizontal press machine; welding the electrode in a vacuum argon filling box; smelting and casting into ingots at the first time through a vacuum consumable electrode arc furnace; smelting and casting into the ingots at the second time through a vacuum consumable electrode arc skull furnace; smelting and casting into the ingots at the third time through the vacuum consumable electrode arc furnace; uniformly annealing; uniformly deforming and processing; thermally processing; and mechanically processing, thus obtaining the titanium alloy standard substance. The Ti80 titanium alloy standard substance is high in uniformity of the components, and can be used for analyzing the components of the Ti80 titanium alloy to precisely control and ensure the quality of Ti80 titanium alloy products.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and relates to a standard substance for measuring and detecting titanium alloy materials, in particular to a Ti80 titanium alloy standard substance, and also relates to a preparation method of the standard substance. Background technique [0002] The nominal composition of Ti80 titanium alloy is Ti-6Al-3Nb-2Zr-1Mo, which is a near-α-type titanium alloy with high aluminum content and contains β-stable elements Nb, Mo and neutral element Zr. It is specially designed for ships A titanium alloy grade designed with high-quality properties such as high strength, corrosion resistance and easy welding. This alloy has high specific strength, belongs to 786MPa grade titanium alloy, has strong corrosion resistance and good welding performance, and is widely used in stressed components, bolts, shafts and pressure-resistant and corrosion-resistant shells of ships. [0003] In order to ensure t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/03C22F1/18G01N1/28
Inventor 赵教育张亚娟袁满巩红涛张卫国
Owner CSIC NO 12 RES INST
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