METHOD AND DEVICE FOR ANALYSIS OF METAL ALLOY SPECIMEN DENSITY AND/OR SURFACE TENSION Russian patent published in 2015 - IPC G01N13/02 

FIELD: physics.

SUBSTANCE: claimed process is based on photometry of metal alloy fused specimen drop on the substrate at heating and, then, cooling whereat metal alloy specimen is placed on the substrate. Then, the substrate with specimen is placed into horizontal furnace, heated, fused and cooled starting from the specimen fusion start at t_fus0 at every temperature t₁ and up to preset maximum temperature t_max. Then, the signals of photoreceiver U_fi are recorded at the computer as i-images of the melt drop. Contours of said images are used to calculate the density thermal dependency d_i(t_i) and/or surface tension σ_i(t_i) of metal alloy specimen drop. Note here that, at cooling, the difference between modules of density d_i(t_i) and/or surface tension σ_i(t_i) for each of temperatures t_i of thermal dependencies at heating and cooling. Then, said differences are summed up at the sum Σ(Δ_i) larger than error δ_i by preset magnitude. Specimen contamination alarm signal is generated. The results of experiment are annulled to experiment with the metal alloy new specimen. Claimed device comprises the photoreceiver connected with the computer. Note also the device incorporates extra units of signalling, timing, subtracting, adding, comparator and its operation threshold controller. Subtraction unit first and second inputs are connected with the computer first port while timing unit input is connected with the computer second port. Timing unit output is connected with subtraction unit third input and adding unit first input. Adding unit second input is connected with subtraction unit output. Adding unit output is connected with one of the comparator inputs. The other input of the computer is connected with comparator operation threshold controller output while comparator output is connected with signalling unit.

EFFECT: online quantitative indication of the specimen contaminants, lower requirements to qualification of personnel.

7 cl, 3 dwg