CN102980874B

CN102980874B - Method for making map for detecting microporosity

Info

Publication number: CN102980874B
Application number: CN201110263055.8A
Authority: CN
Inventors: 彭志江; 刘海强; 李建国; 郭伟杰; 付肃真
Original assignee: Shenyang Liming Aero Engine Group Co Ltd
Current assignee: AECC Shenyang Liming Aero Engine Co Ltd
Priority date: 2011-09-07
Filing date: 2011-09-07
Publication date: 2015-01-28
Anticipated expiration: 2031-09-07
Also published as: CN102980874A

Abstract

A method for making a map for detecting microporosity, belongs to the field of non-destructive testing. The method is characterized by: first collecting microporosity patterns of casting parts, performing metallographic analysis and fluorescence analysis to the patterns, and comparing metallographs with fluorescence photoes; drawing an analog map with CAD tools by reference to fluorescent display results, performing film-making and amendments to the analog map, and then laminating the analog map; and finally performing process inverse and analog map verification. The beneficial effects are: by directly comparing defective components with the map, test procedures for components and parts are simplified, and the turnaround cycle of products is shortened.

Description

A kind of method for making checking the collection of illustrative plates of microporosity

Technical field

The present invention relates to field of non destructive testing, particularly a kind of method for making checking the collection of illustrative plates of microporosity.

Background technology

Manufacture field at aeronautical product, x-ray examination and fluorescent penetration test check two kinds of inside parts and surface imperfection important nondestructiving detecting means, only has this two to close all to have crossed and just can deserve to be called the qualified part of metallurgical quality, but usually run into this situation aborning, fluorescence is carried out on some precision castings surfaces, when x-ray examination is carried out in inside, mostly meet the requirement of technical conditions, can't see defect, but can defect be exposed again when carrying out fluorescent inspection after processing, whether the metallurgical quality of part is qualified, part is judged by metallographic structure contrast point by only way exactly, this adds the work load of operating personnel undoubtedly, also increase the turn around time of part, because of not corresponding with x-ray examination rank fluorescent penetration test class criteria, sometimes much such foundry goods has often all fallen by waste disposal, this brings very large waste to the production of enterprise.

Summary of the invention

Object of the present invention: for above-mentioned problems of the prior art, the invention provides a kind of collection of illustrative plates checking microporosity, in production run, defective parts are directly contrasted collection of illustrative plates and tests, simplify check program, shorten the turn around time of product.

The manufacturing process of the collection of illustrative plates of inspection microporosity provided by the invention is: step one, collects cast member microporosity style; Step 2, carries out metallographic structure analysis, fluorescence morphology analysis to style, by metallograph and fluorescence display photo comparison; Step 3, according to comparing result, draws simulation collection of illustrative plates; Step 4, simulation collection of illustrative plates negative film making, revision, pressing; Step 5, technique reverse, the checking of simulation collection of illustrative plates.

Described step 3, it is characterized in that: first draw a helix, then equidistantly arrange along helix with one piece of filling pattern, control the size of helix pitch, draw the pattern that density is different, fill with different filling patterns, choose the loose display of the corresponding different stage of pattern that density degree increases gradually; Broken up by pattern, suitably the relevant Points And lines of increase and decrease, makes pattern closer to loose display.

Described step 4, it is characterized in that: adopt a kind of virtual printer directly CAD picture to be exported as eps format graphics, add the word and pattern layer of specifying, on the special software of process eps form, finely tune the size of point, size is between 0.25 ~ 0.3mm; Use cardboard shop fixtures, fluorescent paper is sandwiched in centre, applies picture above, bonds between each layer, high pressure pressing.

Described step 5, is characterized in that: rank of the rank after sample figure spectral test and metallographic examination being loosened contrasts, and whether the rank after checking figure spectral test and metallographic examination rank coincide.

Accompanying drawing explanation

Fig. 1 is inspection microporosity collection of illustrative plates fabrication processing figure;

Fig. 2 is style 1 ~ 6 grade of microporosity metallographic shape appearance figure;

Fig. 3 is style 1 ~ 6 grade of microporosity fluorescence display shape appearance figure;

Fig. 4 is the collection of illustrative plates of the inspection microporosity be depicted as the first time;

Fig. 5 is through the collection of illustrative plates of revised inspection microporosity.

Embodiment

As shown in Figure 1, inspection microporosity collection of illustrative plates fabrication processing figure provided by the invention, first the sample with different rarefaction defect size is collected, X-ray observation, Linear cut, metallographic structure observation are carried out to these styles, according to metallographic structure analysis result with reference to " microporosity comparation and assessment figure ", metallograph is carried out rank sequence by 1 ~ 6 grade, as shown in Figure 2, then in order metallographic specimen level Four ultrahigh-sensitivity fluorescence immersion is steeped, cleans, taken pictures, the Fluirescence observation in corresponding technological process Fig. 1 and fluorescent liquid cleaning, to metallographic specimen fluoroscopic examination display result as shown in Figure 3, to the loose size of fluoroscopic examination display, form and the comparative analysis of metallographic testing result, chart with reference to fluorescence display CAD software simulation, detailed process is: first draw a helix, then equidistantly arrange along helix with one piece of filling pattern, control the size of helix pitch, draw the pattern that density is different, fill with different filling patterns, choose the loose display of the corresponding different stage of pattern that density degree increases gradually, as shown in Figure 4, the pattern that described density degree increases from top to bottom is gradually as visible fluorescence examination criteria, in figure, numeral 1 ~ 6 represents the rank of rarefaction defect, pattern and digital one_to_one corresponding.

The fluff that fluff is unintelligible, 0.25 ~ 0.30mm is less larger in the simulation collection of illustrative plates be depicted as the first time be can't see at all, with some difference loose of reality, the form dwg that CAD can directly generate, dxf, dwt, in bmp, the company of publishing picture can identify and export only have bmp form, but the bmp format resolution directly exported is too low, the visual serious distortion made, directly CAD is generated eps format graphics for adopting a kind of virtual printer in the above problem embodiment of the present invention, add word and pattern layer on this basis, its effects is very good, simultaneously, loose pattern also can regulate arbitrarily (zooming in or out), the size of point also can make the appropriate adjustments, reference standard, the size of adjustment point is between 0.25 ~ 0.30mm, come and go revision version more than ten times, so far whole collection of illustrative plates is completed, as shown in Figure 5, clear through revised its effect of inspection collection of illustrative plates, bright.

In the preferred embodiment of the present invention, the pressing of collection of illustrative plates uses cardboard or plastic plate shop fixtures, requires straight; Fluorescent paper is sandwiched in centre, and described fluorescent paper soaks 8 ~ 10 minutes in saturated fluorescent liquid, hangs up dry 3 ~ 5 days with clip; Apply the picture of drafting above; By senior transparent sealing glue bonding between each layer, high pressure pressing.

The checking of technique reverse is carried out to material object in inspection collection of illustrative plates after revision, the pressing scene of putting into production, and rank of the rank after material object figure spectral test and metallographic examination being loosened contrasts, and whether rank and the metallographic examination rank of proof diagram spectral test coincide.In the embodiment of the present invention, the checking of technique reverse is carried out to 36 directionally solidified alloy high-pressure turbine working blades that metallographic is dissected, inspection is carried out under same process conditions, equal sensitivity, the consistance of figure spectral test of the present invention and metallographic examination are tied and are fitted like a glove, indivedual assay is also higher than metallographic examination, as shown in table 1.

Table 1. 36 directionally solidified alloy high-pressure turbine working blades technique reverse in kind the result

The foregoing is only preferred embodiment of the present invention, and be not used to limit application range of the present invention; Under all other do not depart from disclosed essence, the equivalence that completes changes or modifies, and all should be included in following Claims scope.

Claims

1. check a method for making for the collection of illustrative plates of foundry goods microporosity, the manufacturing process of described collection of illustrative plates comprises, and collects sample, metallographic examination, fluorescence analysis; It is characterized in that: the manufacturing process of described collection of illustrative plates also comprises, the drafting of figure spectrum analog, collection of illustrative plates negative film making, revision, pressing, checking;

Described figure spectrum analog drawing process: first draw a helix, then equidistantly arrange along helix with one piece of filling pattern, control the size of helix pitch, draw the pattern that density is different, fill with different filling patterns, choose the loose display of the corresponding different stage of pattern that density degree increases gradually; Broken up by pattern, suitably the relevant Points And lines of increase and decrease, makes pattern closer to loose display;

The manufacturing process of described collection of illustrative plates egative film: adopt a kind of virtual printer directly CAD picture to be exported as eps format graphics;

The revision process of described collection of illustrative plates egative film: on the special software of process eps form, adds the word and pattern layer of specifying, and finely tune the size of point, size is between 0.25 ~ 0.3mm.

2. the method for making of collection of illustrative plates according to claim 1, the bonding processes of described collection of illustrative plates egative film, is characterized in that: use hardboard shop fixtures, fluorescent paper is sandwiched in centre, applies picture above, bonds between each layer, high pressure pressing.

3. the method for making of collection of illustrative plates according to claim 1, described collection of illustrative plates proof procedure, it is characterized in that: rank of the rank after sample figure spectral test and metallographic examination being loosened contrasts, and whether the rank after checking figure spectral test and metallographic examination rank coincide.