Production method of the magnetometric sensor and the semi- hard magnetic material which for robbery prevention become making use of the semi- hard magnetic material and that

摘要

While maintaining coercivity and the residual induction which are required from the magnetic bias provision band of the magnetometric sensor for robbery prevention in the same range as the former semi- hard magnetic material, it offers the production method of the magnetometric sensor and the semi- hard magnetic material which for robbery prevention become the semi- hard magnetic material of the resource-saving type which decreases Ni content making use of that. Mass % with Ni: Under 13.0% of 5.0% or more, Mn: 4.0% or less of 0.5% or more, Al: It exceeds 0%, 3.0% or less, Ti: It exceeds 0% and 1.0% or less, the remainder consists of Fe and the impurity, coercivity 1000 - 2400A/m, is the semi- hard magnetic material where residual induction is above 1.3T. Production method of the aforementioned semi- hard magnetic material in the sheet after the cold rolled does aging processing in the temperature range of 520 - the 680, coercivity 1000 - 2400A/m, is production method of the semi- hard magnetic material which residual induction makes above 1.3T. Selective figure Figure 2