High aluminiferous ferritic stainless steel sheet for weight sensor substrate, method for producing the same, and weight sensor
a technology of ferritic stainless steel and substrate, which is applied in the direction of pedestrian/occupant safety arrangement, instrument, vehicular safety arrangement, etc., can solve the problems of the average linear expansion coefficient between the stainless steel substrate and the glass layer is too large, so as to achieve excellent glass adhesiveness and high temperature oxidation resistance
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example 1
High aluminiferous ferritic stainless steels shown in Table 1 were melted and refined by the converter AOD method or the vacuum melting method. These steels were subjected to surface conditioning, thereafter hot rolled at a hot-rolling finishing temperature in the range from 880° C. to 900° C., coiled at a hot-rolling coiling temperature in the range from 400° C. to 750° C., and cooled by water cooling, and thus hot-rolled steel strips 5 mm and 3.8 mm in thickness were produced. Successively, the hot-rolled steel strips were subjected to shot blasting and descaling by pickling, and thereafter cold rolled to the thickness of 3 mm and 2 mm. Successively, the cold-rolled steel strips were annealed at 920° C. and then subjected to salt treatment and descaling by pickling, and thus cold-rolled steel sheets were produced. With regard to crystallized glass, crystallized glass having the average linear expansion coefficient of 14.5×10−6 / ° C. was used.
Here, evaluation tests were carried o...
example 2
The steel sheets of sample Nos. 7 and 3 shown in Table 1 were subjected to baking heat treatment under the conditions shown in Table 2. The crystallized glass having the average linear expansion coefficient of 14.5×10−6 / ° C., which was the same as used in EXAMPLE 1, was used.
A coating film thickness was measured by GDS (Glow Discharge Emission Spectrometry). The measuring device was JY500ORF-PSS type made by JOBIN YVON (France) and the measurement area was 4 mm in diameter. A sputter speed was measured by the depth formed after subjecting a Japanese Iron and Steel Certified Reference Material JSS652-13 to the discharge for 250 seconds. As the samples for calibration, four kinds of specimens including Japanese Iron and Steel Certified Reference Materials JSS652-13, JSS171-1, JSS1001-1 and the like were used.
The resistance to temper color was judged by visually observing the existence of color development at visible wavelengths.
The invention example Nos. 7 and 19 to 21 were the...
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