Nisshin Steel Co., Ltd.

Nippon Steel Nisshin Co., Ltd.

Koji Omosako

Hajime Nakamura

Yoshio Nakajima

Takaharu Moriya

Satoshi Tagashira

Shoichi Koutani

Yoshio Tokuta

Manufacturing a steel sheet for a steel belt includes hot rolling a steel slab containing, in mass %, 0.60 to 0.80% of C, 1.0% or less of Si, 0.10 to 1.0% of Mn, 0.020% or less P, 0.010% or less S, 0.1 to 1.0% of Cr, 0 to 0.5% of V, 0 to 0.1% of Ti, 0 to 0.1% of Nb, and 0 to 0.01% of B, the balance Fe and unavoidable impurities, under a finish hot rolling temperature of 800 to 900&#xb0; C. An average cooling rate from finish rolling to coiling is 20&#xb0; C. per second or more. A coiling temperature is 450 to 650&#xb0; C. The hot-rolled slab is cold rolled with a total rolling reduction ratio of 40% or more and a reduction ratio per one pass of less than 12%, without performing a heat treatment. The cold-rolled slab is aged at 200 to 500&#xb0; C. for 0.5 to 30 hours.

Process for manufacturing a steel sheet, and steel belt made therefrom

In the reference electrode for the oxygen probe comprising a mixture of Cr powder and Cr.sub.2 O.sub.3 powder, an improved reference electrode characterized in that Cr powder and Cr.sub.2 O.sub.3 powder are mixed in a ratio 97%:3% to 80%:20% and the mixture is sintered beforehand. An oxygen probe using this electrode exhibits improved response, stability and reproducibility in molten steel.

Reference electrode for oxygen probe

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Hiroshima, Japan

Koji Omosako