1. Quenching When quenching and heating in a salt bath furnace, the springs should be evenly bundled with iron wires, or the springs should be heated on the mandrel. When heating, ensure that the surface of the spring is oxidized and decarburized. Salt baths should be carefully deoxygenated. It can also be heated in a box-type furnace with a controlled atmosphere. The heating temperature is 850 degree C ± 10 degree C, and the temperature is kept for 1015 minutes, and the quenching oil is cooled through the furnace.
2.ばねの疲労強度を向上させるためにショットブラストが必要です。 発射体の直径は0。3 0。5mmです。 圧縮空気噴射を使用する場合、圧縮空気の圧力は0.40.5MPaです。 遠心ショットブラストでは、発射体の線速度は70m / sです。 ショットブラストで処理された圧縮ばねの耐用年数は2倍以上になる可能性があります。
3.再結晶焼鈍圧縮ばねを圧延して成形した後、ばねの幾何学的寸法を安定させ、焼入れ中の変形を減らすために、再結晶および焼鈍する必要があります。 再結晶焼鈍温度は550650度で、11.5時間保持した後、空冷-します。 塩浴炉で少量を行うことができ、連続抵抗炉を使用して大量の雰囲気を制御することができます。
4. Tempering can be carried out twice after tempering and quenching. Correction and tempering should be carried out first. The temperature of correction and tempering should generally be lower than the final tempering temperature by about 20 degree , and the temperature should be kept for 10-15 minutes. The final tempering is then carried out, and after the spring size is corrected, the spring is mounted on the tempering jig for final tempering. The tempering fixture should ensure that the pitch and free length of the spring meet the requirements. The tempering temperature is 420 degree ±10 degree , the temperature is kept for 3035min, and the furnace is water-cooled.
