Formula of high-elastic titanium alloy dissolving solution

Abstract

The formula of the high-elastic titanium alloy dissolving solution comprises the following components: sulfuric acid, nitric acid, fluoboric acid and water. The volume ratio of the sulfuric acid to the nitric acid to the fluoboric acid to the water is 1: 0.5: 3: 4.5. The method is simple to operate, can be widely applied to dissolution when the high-elastic titanium alloy is measured by adopting the inductively coupled plasma atomic emission spectrometry, is high in content of the detected niobium element, and is wide in application range.

Description

Technical Field

[0001] The present invention relates to the technical field of solution formulations, and particularly to a formulation of a high-elastic titanium alloy dissolution solution. Background Art

[0002] High-elastic titanium alloy is a new type of titanium alloy material with a niobium content ranging from 34% to 36%. It is widely used in the production and life of military and civilian products. The national standard commonly used for detecting the content is GB / T4698.22-2017 "5-Br-PADAP Spectrophotometry and Inductively Coupled Plasma Atomic Emission Spectrometry". However, since the applicable range of this method is 0.10% - 16.00%, the mixed acid for dissolving the sample solution is a combination of hydrochloric acid + hydrofluoric acid + nitric acid for sample preparation. Due to the high niobium content in high-elastic titanium alloy, this mixed acid cannot effectively dissolve the sample and the operation is cumbersome and difficult to master. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a formulation of a high-elastic titanium alloy dissolution solution to solve the problems in the above background art.

[0004] The technical problem solved by the present invention is achieved by the following technical solutions: A formulation of a high-elastic titanium alloy dissolution solution, the components are sulfuric acid, nitric acid, fluoboric acid and water. Measured by volume ratio, the volume ratio of sulfuric acid, nitric acid, fluoboric acid and water is 1:0.5:3:4.5.

[0005] A method for detecting the niobium element content in high-elastic titanium alloy using a formulation of a high-elastic titanium alloy dissolution solution, the specific steps are as follows: Step 1: Weigh an appropriate amount of high-elastic titanium alloy sample and put it into polytetrafluoroethylene, add sulfuric acid + fluoboric acid, and then place it in a low-temperature electric furnace and heat to 230°C - 250°C for 16 - 26 minutes until the high-elastic titanium alloy sample is completely dissolved to obtain an initial mixed solution; Step 2: Add nitric acid to the initial mixed solution for oxidation, cool it and transfer it to a detection container, and then dilute it to the scale line with water in the detection container and shake well to obtain a detection solution; Step 3: Place the detection solution in an inductively coupled plasma emission spectrometer for determination, and then combine with the standard curve to obtain the niobium element content in the high-elastic titanium alloy.

[0006] Advantageous Effects: The operation of the present invention is simple, and it can be widely applied to the dissolution when measuring high-elastic titanium alloy by inductively coupled plasma atomic emission spectrometry. The detected niobium element content is high and the applicable range is wide. Detailed Embodiments

[0007] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments. Example

[0008] When the volume ratio of sulfuric acid, nitric acid, fluoboric acid and water is 1:0.5:3:4.5, 0.0500 g of high-elastic titanium alloy with the grade of Ti-3523 is dissolved, the heating temperature is 230 °C, and the experimental results are as follows: the volume of the dissolution solution used is 20 ml and the time is 16 minutes; when using the dissolution solution with the standard formula, the sample dissolution time is 50 minutes, it cannot be completely dissolved, and there is a turbidity phenomenon; this example is specifically implemented according to the following steps: Step 1: Weigh 0.0500 g of high-elastic titanium alloy sample and put it into polytetrafluoroethylene, add sulfuric acid + fluoboric acid, and then place it in a low-temperature electric furnace and heat to 230 °C, heat for 16 minutes until the sample is completely dissolved to obtain an initial mixed solution; Step 2: Add nitric acid to the initial mixed solution for oxidation, cool it and transfer it to a detection container, and then dilute it to the scale line with water in the detection container and shake it well to obtain a detection solution; Step 3: Place the detection solution in an inductively coupled plasma emission spectrometer for determination, and then combine the standard curve to obtain the content of niobium element in the high-elastic titanium alloy, and the content of niobium element is 34%. Example

[0009] When the volume ratio of sulfuric acid, nitric acid, fluoboric acid and water is 1:0.5:3:4.5, 0.2000 g of high-elastic titanium alloy with the grade of Ti-3523 is dissolved, the heating temperature is 250 °C, and the experimental results are as follows: the volume of the dissolution solution used is 30 ml and the time is 26 minutes; when using the dissolution solution with the standard formula, the sample dissolution time is 48 minutes, it cannot be completely dissolved, and there is a turbidity phenomenon; this example is specifically implemented according to the following steps: Step 1: Weigh 0.2000 of high-elastic titanium alloy sample and put it into polytetrafluoroethylene, add sulfuric acid + fluoboric acid, and then place it in a low-temperature electric furnace and heat to 250 °C, heat for 26 minutes until the sample is completely dissolved to obtain an initial mixed solution; Step 2: Add nitric acid to the initial mixed solution for oxidation, cool it and transfer it to a detection container, and then dilute it to the scale line with water in the detection container and shake it well to obtain a detection solution; Step 3: Place the detection solution in an inductively coupled plasma emission spectrometer for determination, and then combine the standard curve to obtain the content of niobium element in the high-elastic titanium alloy, and the content of niobium element is 35%. Example

[0010] When the volume ratio of sulfuric acid, nitric acid, fluoboric acid and water is 1:0.5:3:4.5, 0.1000 g of high-elastic titanium alloy with the grade of Ti-3523 is dissolved. The heating temperature is 250 °C. The experimental results are as follows: the volume of the dissolution solution used is 25 mL and the time is 18 minutes; when using the dissolution solution with the standard formula, the sample dissolution time is 45 minutes, and it cannot be completely dissolved, and there is a turbidity phenomenon. This embodiment is specifically implemented according to the following steps: Step 1: Weigh 0.1000 of the high-elastic titanium alloy sample and put it into polytetrafluoroethylene. Add sulfuric acid + fluoboric acid, and then place it in a low-temperature electric furnace and heat to 250 °C. Heat for 18 minutes until the sample is completely dissolved to obtain an initial mixed solution; Step 2: Add nitric acid to the initial mixed solution for oxidation. After cooling, transfer it to a detection container, and then dilute it to the scale line with water in the detection container and shake well to obtain a detection solution; Step 3: Place the detection solution in an inductively coupled plasma optical emission spectrometer for determination, and then combine with the standard curve to obtain the content of niobium element in the high-elastic titanium alloy. The content of niobium element is 35%.

[0011] In Examples 1 to 3, the dissolution acids used in the standard formula are hydrochloric acid + hydrofluoric acid + nitric acid in accordance with GB / T 4698.22 of the national standard.

[0012] The specific embodiments described herein are merely illustrative of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A formula of a high elastic titanium alloy dissolving solution, characterized in that: The components are sulfuric acid, nitric acid, fluoroboric acid and water; measured by volume, the volume ratio of sulfuric acid, nitric acid, fluoroboric acid and water is 1:0.5:3:4.

5.

2. A method for detecting the niobium content in a high-elastic titanium alloy using the formula of a high-elastic titanium alloy solution as claimed in claim 1, characterized in that: The specific steps are as follows: Step 1, weigh an appropriate amount of high-elastic titanium alloy sample and put it into polytetrafluoroethylene, add sulfuric acid + fluoroboric acid, and then place it in a low-temperature electric heating furnace for heating until the high-elastic titanium alloy sample is completely dissolved to obtain an initial mixed solution; Step 2, adding nitric acid to the initial mixed solution for oxidation, transferring the mixture into a detection container after cooling, and then diluting the mixture to the scale line with water in the detection container and shaking well to obtain a detection solution; Step 3: Place the test solution in an inductively coupled plasma emission spectrometer for measurement, and then combine with the standard curve to obtain the content of niobium in the high-elastic titanium alloy.

3. The method for detecting the niobium content in a high-elastic titanium alloy using the formula of a high-elastic titanium alloy dissolving solution according to claim 2, characterized in that: Place in a low temperature electric heating furnace and heat at a temperature of 230°C ~ 250°C for 16 ~ 26 minutes.