CN104089965A - Test method of detection sensitivity of X rays to titanium alloy high-density inclusions - Google Patents

Abstract

The invention discloses a test method of the detection sensitivity of X rays to titanium alloy high-density inclusions. The test method comprises the steps: firstly, preparing titanium alloy materials into titanium alloy plates with same thickness; then selecting high-density metal materials to prepare metal particles in different shapes and with different sizes; embedding the high-density metal particles into the upper surfaces of the titanium alloy plates, so as to form the high-density inclusions; then stacking the titanium alloy plates to form a simulation workpiece, putting below an X-ray detector, putting an imaging film below the simulation workpiece, and setting appropriate X-ray detection parameters, so as to detect X rays, wherein the high-density inclusions can be reflected on the imaging film when the X rays irradiate the simulation workpiece and pass through the high-density inclusions; and judging the detection sensitivity of the X rays to the titanium alloy high-density inclusions according to the imaging conditions of the high-density inclusions on the imaging film. The detection sensitivity of the X rays to the titanium alloy high-density inclusions can be accurately judged by using the method.

Description

The method of testing of X ray to titanium alloy high density inclusions detection sensitivity

Technical field

The present invention relates to the method for testing of a kind of X ray to metallic inclusion detection sensitivity, particularly related to the method for testing of a kind of X ray to titanium alloy high density inclusions detection sensitivity.

Background technology

It is a kind of inherent vice of metal material that metal material inside exists snotter.When titanium alloy inside exists high desnity metal snotter, snotter can cause that stress is concentrated, and produces micro-crack when forging, and becomes the tired source under alternate load, starts from here to cause titanium alloy cracking, destroys, and finally cause material cracking to be scrapped.Detection for titanium alloy middle-high density snotter, at present, what mostly adopt is that UT (Ultrasonic Testing) detects, the clutter that causes but this detection method can only find that titanium alloy exists high density inclusions, thereby play the positioning action to high density inclusions, can not react really size and the form of snotter.

It is metal material inherent vice to be carried out to a kind of common method of Non-Destructive Testing that X ray detects, and when ray is through after object, intensity can decay.The degree of its decay throughout because of its through thickness, the structure at position or there is zero defect different, result has just formed different " images " of a width ray density distribution, and can be placed in imaging egative film after object other recording mediums such as (or) video screens and record or show, reach the object that the inherent vice of material is detected.Although this detection method of X-ray can react size and the form of defect really, but when x-ray bombardment metal material, its sensitivity meeting decays inner generation of metal material, and different for its attenuation of different materials, therefore before adopting the method, must first to the sensitivity of x-ray detection system, test.

X ray is to titanium alloy high density inclusions detection sensitivity, comprises minimum high density inclusions size that X ray can be identified definite precision, the X ray of high density inclusions position relationship in simulation workpiece and the complexity of X ray identification point-like and wire high density inclusions.

Sensitivity for x-ray detection system detects, generally need to provide the metal material that has known defect, by suitable characterization processes, obtain testing result, again testing result and known real defect are analyzed, could reflect objectively the detection sensitivity of ray detection system.But in conventional method, material internal has zero defect, and the size of defect, form, position etc., before not detecting, cannot not determine.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind ofly manufactures known defect by embed high density inclusions in titanium alloy plate layer, complete the method for X ray to the test of titanium alloy high density inclusions detection sensitivity, to know accurately the detection sensitivity of X ray to titanium alloy high density inclusions.

For solving the problems of the technologies described above, the method for testing of X ray of the present invention to titanium alloy high density inclusions detection sensitivity, its technical scheme comprises the following steps:

(1) titanium alloy material is made to the titanium alloy plate of same thickness;

(2) select high desnity metal material to make shape, the standby not identical metallic particles of size;

(3) high desnity metal particle is embedded into the upper surface of titanium alloy plate, forms high density inclusions;

(4) again the titanium alloy plate that embeds high density inclusions is gathered into folds and forms simulation workpiece with the titanium alloy plate that does not embed high density inclusions, and simulation workpiece is put under X ray detector, below simulation workpiece, be placed with an imaging egative film, set suitable X ray detected parameters it is carried out to X ray detection, when x-ray bombardment is also passed high density inclusions to simulation workpiece, high density inclusions can be reflected on imaging egative film;

(5) according to high density inclusions, the imaging situation on imaging egative film can judge that X ray is to titanium alloy high density inclusions detection sensitivity.

Totally 8 of titanium alloy plates described in step (1), the thickness of every titanium alloy plate is 10mm.

The described high desnity metal material of step (2) is tantalum, tungsten, molybdenum, niobium.

The size of the metallic particles that step (2) is described is as shown in the table:

Distance between the high density inclusions that step (3) is described and imaging egative film, by having the titanium alloy plate of high density inclusions and not having the stacked position of the titanium alloy plate of high density inclusions to determine.

The thickness of the simulation workpiece that step (4) is described is by having the titanium alloy plate of high density inclusions and not having total number of the titanium alloy plate of high density inclusions to determine.

The definite method of the described X ray of step (5) to titanium alloy high density inclusions detection sensitivity:

Wherein, the position relationship of high density inclusions in simulation workpiece, comprise position relationship in vertical direction and the position relationship in horizontal direction, the position in horizontal direction can determine by the image space on imaging egative film according to it, and the position relationship in vertical direction is as follows:

$d=f\·\frac{r-1}{r}$

In formula:

D is the distance that high density inclusions arrives imaging egative film, the mm of unit;

F is the imaging focal length of X ray detector, the mm of unit;

R is the enlargement factor of high density inclusions on imaging egative film, is that high density inclusions becomes the ratio of the area of " image " and the actual projected area of high density inclusions in the vertical direction on imaging egative film.

The complexity of the minimum high density inclusions size that wherein, X ray can be identified and X ray identification point-like and wire high density inclusions can be determined according to the quantity of the shown high density inclusions on imaging egative film.

Compared with prior art, beneficial effect of the present invention is as follows:

The method of testing of X ray of the present invention to titanium alloy high density inclusions detection sensitivity, in titanium alloy plate layer, embed high density inclusions and carry out manufacturing defect, the size of high density inclusions, shape and the position relationship in simulation workpiece are known conditions.High density inclusions is by the irradiation of X ray, be reflected on imaging egative film, can be by high density inclusions on imaging egative film become the ratio of the area of " image " and the actual projected area of high density inclusions in the vertical direction to determine the enlargement factor r of high density inclusions on imaging egative film, then pass through formula determine the position of high density inclusions in simulation workpiece vertical direction, i.e. the distance of high density inclusions Range Imaging egative film; Image space according to high density inclusions on imaging egative film is determined the position in its horizontal direction.By high density inclusions quantity shown on imaging egative film, know the minimum high density inclusions size that X ray can be identified, and the complexity of X ray identification point-like and wire high density inclusions.

In sum, the method can the imaging situation on imaging egative film accurately can judge that X ray is to titanium alloy high density inclusions detection sensitivity according to high density inclusions.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.

Fig. 1 is the horizontal level figure of snotter on TC11 plate;

Working state figure when Fig. 2 is X ray transillumination simulation workpiece.

Embodiment

The detection method of implementing X ray metal material detection system of the present invention sensitivity, need to provide X ray detector.The titanium alloy that the material trademark of usining is TC11 is as tested material, and the four kinds of metals such as tantalum, tungsten, molybdenum, niobium of take are example as snotter, set forth the specific embodiment of the present invention.

Concrete steps of the present invention are as follows:

First, TC11 material is made to the TC11 plate 20 that thickness is 10mm, totally 8;

Secondly, respectively four kinds of high desnity metal materials such as tantalum, tungsten, molybdenum, niobium are made to size, the standby not identical particle of shape, as shown in table 1:

Table 1:

Again, according to the arrangement mode of table 1 and order, four kinds of metallic particles such as molybdenum, tungsten, niobium, tantalum are embedded into the upper surface of TC11 plate 20, form the TC11 plate 21 with high density inclusions 3, as shown in Figure 1.

Again, as shown in Figure 2, by the TC11 plate without high density inclusions 3 20 and the TC11 plate 21 that has a high density inclusions 3 in layer closed assembly get up to form simulation workpiece 5, simulation workpiece 5 is put into X ray detector 1 below, and be placed with x-ray imaging egative film 4 below simulation workpiece 5, when x-ray bombardment is also passed high density inclusions 3 to simulation workpiece 5, high density inclusions 3 can be reflected on imaging egative film 4.

Wherein, distance between described high density inclusions 3 and imaging egative film 4, the TC11 plate 20 by without high density inclusions with have the stacked position of the TC11 plate 21 of high density inclusions to determine.

Wherein, the TC11 plate 20 of the thickness of described simulation workpiece 5 by without high density inclusions with have total number of the TC11 plate 21 of high density inclusions to determine.

Wherein, described high density inclusions is the position relationship in workpiece in simulation, comprises position relationship in vertical direction and the position relationship in horizontal direction, wherein, position in horizontal direction can determine by the image space on imaging egative film according to it, and the position relationship in vertical direction is as follows:

$d=f\·\frac{r-1}{r}$

In formula:

D is that high density inclusions 3 is to the distance of imaging egative film 4, the mm of unit;

F is the imaging focal length of X ray detector, the mm of unit;

R is the enlargement factor of high density inclusions 3 on imaging egative film, is that high density inclusions 3 becomes the ratio of the area of " image " and the actual projected area of high density inclusions 3 in the vertical directions on imaging egative film.

The complexity of minimum high density inclusions 3 sizes that wherein, described X ray can be identified and X ray identification point-like and wire high density inclusions 3 can be determined according to the quantity of the shown high density inclusions 3 on imaging egative film 4.

For implementing better the present invention, the present embodiment selects the X ray detected parameters shown in table 2 to carry out X ray detection to TC11 plate:

Table 2:

The experimental result of the present embodiment is as follows:

High density inclusions 3 Range Imaging egative film 4 positions are when different, and the situation of change of enlargement factor is as table 3:

Table 3:

High density inclusions 3 is from the distance mm of imaging egative film 4	Enlargement factor r
		70	1.04
60	1.034
		50	1.029
40	1.023
		30	1.017
20	1.011
		10	1.006

High density inclusions 3 situations that can identify are as table 4:

Table 4:

The situation of the high density inclusions 3 that can not identify, as table 5:

Table 5:

From experimental result, can find out: transillumination thickness is within the scope of 20～80mm, and X ray detection sensitivity can reach and detect the W snotter of 0.42mm * 0.56mm * 0.62mm and the Ta snotter of 0.63mm * 1.52mm * 0.51mm.Transillumination thickness is greater than after 40mm, X ray detects different with the detectability of point-like molybdenum snotter (0.44mm * 0.60mm * 0.68mm) to the wire molybdenum snotter (0.45mm * 0.57mm * 10.24mm) of same size, and now point-like inclusion can not be differentiated; When transillumination thickness reaches 80mm, the molybdenum that X ray can only detect 0.97mm * 1.06mm * 1.12mm is mingled with.Transillumination thickness reaches after 70mm, and X ray detects the detectability to niobium snotter, and the niobium that 0.90mm * 0.94mm * 1.00mm can only be detected is mingled with, and the wire niobium of 0.50mm * 4.11mm * 0.53mm is mingled with and can not be detected; When transillumination thickness reaches 80mm, the niobium that X ray can only detect 1.55mm * 1.53mm * 1.44mm is mingled with.

Claims (7)

1. the method for testing of X ray to titanium alloy high density inclusions detection sensitivity, is characterized in that, comprises the following steps:

(1) titanium alloy material is made to the titanium alloy plate of same thickness;

(2) select high desnity metal material to make shape, the standby not identical metallic particles of size;

(3) high desnity metal particle is embedded into the upper surface of titanium alloy plate, forms high density inclusions;

(4) again the titanium alloy plate that embeds high density inclusions is gathered into folds and forms simulation workpiece with the titanium alloy plate that does not embed high density inclusions, and simulation workpiece is put under X ray detector, below simulation workpiece, be placed with an imaging egative film, set suitable X ray detected parameters it is carried out to X ray detection, when x-ray bombardment can be reflected in high density inclusions on imaging egative film when simulation workpiece also passes high density inclusions;

(5) according to high density inclusions, the imaging situation on imaging egative film can judge that X ray is to titanium alloy high density inclusions detection sensitivity.

2. the method for testing of X ray according to claim 1 to titanium alloy high density inclusions detection sensitivity, is characterized in that, totally 8 of affiliated titanium alloy plates, and the thickness of every titanium alloy plate is 10mm.

3. the method for testing of X ray according to claim 1 to titanium alloy high density inclusions detection sensitivity, is characterized in that, described high desnity metal material is tantalum, tungsten, molybdenum, niobium.

4. the method for testing of X ray according to claim 1 to titanium alloy high density inclusions detection sensitivity, is characterized in that, the size of described metallic particles is as shown in the table:

5. the method for testing of X ray according to claim 1 to titanium alloy high density inclusions detection sensitivity, it is characterized in that, distance between described high density inclusions and imaging egative film, by having the titanium alloy plate of high density inclusions and not having the stacked position of the titanium alloy plate of high density inclusions to determine.

6. the method for testing of X ray according to claim 1 to titanium alloy high density inclusions detection sensitivity, it is characterized in that, the thickness of described simulation workpiece is by having the titanium alloy plate of high density inclusions and not having total number of the titanium alloy plate of high density inclusions to determine.

7. the method for testing of X ray according to claim 1 to titanium alloy high density inclusions detection sensitivity, is characterized in that, the definite method of described X ray to titanium alloy high density inclusions detection sensitivity:

Wherein, the position relationship of high density inclusions in simulation workpiece, comprise position relationship in vertical direction and the position relationship in horizontal direction, the position in horizontal direction can determine by the image space on imaging egative film according to it, and the position relationship in vertical direction is as follows:

$d=f\·\frac{r-1}{r}$

In formula:

D is the distance that high density inclusions arrives imaging egative film, the mm of unit;

F is the imaging focal length of X ray detector, the mm of unit;

R is the enlargement factor of high density inclusions on imaging egative film, is that high density inclusions becomes the ratio of the area of " image " and the actual projected area of high density inclusions in the vertical direction on imaging egative film.

The complexity of the minimum high density inclusions size that wherein, X ray can be identified and X ray identification point-like and wire high density inclusions can be determined according to the quantity of the shown high density inclusions on imaging egative film.