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发明公开
CN109777924A 一种耐候钢高强螺栓连接副热处理工艺 无效 - 驳回

一种耐候钢高强螺栓连接副热处理工艺
摘要：
本发明公开了一种耐候钢高强螺栓连接副热处理工艺，包括以下步骤S1：螺栓连接副预处理；S2：对预处理后的螺栓连接副淬火处理，淬火温度为790-870℃，淬火时间为55-65min；S3：螺栓连接副淬火后进行回火处理，回火温度为500-530℃，回火时间为110-130min；S4：热处理结束，获得成品；所述步骤S2包含将螺栓连接副放入淬火炉，向淬火炉中通入甲醇后；将淬火炉温度缓慢升至790-810℃，保持8-12min；继续升温至820-840℃，保持8-12min；继续升温至870-890，保温25-35min；降温至865-875℃，保持8-12min，经过该热处理工艺处理后的螺栓连接副防腐蚀效果优良，强度高，耐候系数达到6.95以上，延伸率达到13％以上，断面收缩率达到50％以上，-20℃冲击功达到41J以上。
摘要（英）：

The invention discloses a heat treatment process for a weather-resistant steel high-strength bolt connection pair. The heat treatment process for the weather-resistant steel high-strength bolt connection pair comprises the following steps: S1, carrying out pretreatment on the bolt connection pair; S2, carrying out quenching treatment on the pretreated bolt connection pair for a quenching time of 55-65min at a quenching temperature of 790-870 DEG C; S3, carrying out tempering treatment on the bolt connection pair after being quenched for a tempering time of 110-130min at a tempering temperatureof 500-530 DEG C; and S4, obtaining a finished product after the heat treatment is concluded, wherein the step S2 comprises placing the bolt connection pair in a quenching furnace, and charging methanol into the quenching furnace; then slowly increasing the temperature of the quenching furnace to 790-810 DEG C, and keeping for 8-12min; continuing to heat to reach 820-840 DEG C, and keeping for 8-12min; continuing to heat to reach 870-890 DEG C, and insulating heat for 25-35min; and cooling to reach 865-875 DEG C, and keeping for 8-12min. The bolt connection pair treated through the heat treatment process is excellent in anti-corrosion effect and high in strength; and the weather-resistant coefficient reaches 6.95 and above, the ductility reaches 13% and above, the percentage reduction ofarea reaches 50% and above, and the impact energy at minus 20 DEG C reaches 41J and above.

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