冷拔無縫鋼管生產控制措施包括什麼

冷拔無縫鋼管生產控制首先就是提高鋼管的塑韌性，提高鋼水的潔凈度，減少有害夾雜，提高鋼管的整體質量。在生產過程中采用合理的冷卻制度，避免內部出現裂紋，從多方面出發提高冷拔無縫鋼管的質量。冷拔無縫鋼管在生產過程中合理控制加熱溫度，通過測定熱塑性曲線，選擇最佳的加熱溫度。管坯加熱還要註意有足夠的保溫時間，以降低變形抗力和提高45#結構冷拔無縫鋼管塑韌性。
The production control of cold-drawn seamless steel pipes is to improve the plasticity and toughness of steel pipes, improve the cleanliness of molten steel, reduce harmful inclusions and improve the overall quality of steel pipes. In the production process, reasonable cooling system is adopted to avoid internal cracks and improve the quality of cold-drawn seamless steel tube from many aspects. The heating temperature of cold-drawn seamless steel pipe is reasonably controlled in the production process, and the optimum heating temperature is selected by measuring the thermoplastic curve. In order to reduce the deformation resistance and improve the plastic toughness of 45# cold-drawn seamless steel tube, sufficient heat preservation time should be paid attention to when the tube billet is heated.
冷拔無縫鋼管的生產過程需要的程序比較多，最後一步是降低軋輥轉速，軋輥轉速是穿孔工藝的關鍵參數，軋輥轉速由低向高變化過程中，存在一個開始出現分層的臨界軋輥轉速。軋輥轉速較低時，管坯容易形成孔腔；軋輥轉速較高時，管坯和45#結構冷拔無縫鋼管容易形成分層缺陷。為瞭消除管坯和45#結構用無縫鋼管分層缺陷，應把軋輥轉速降低到開始出現分層的臨界軋輥轉速以下。
The last step i环氧地坪s to reduce the roll speed. Roll speed is the key parameter of piercing process. In the process of changing the roll speed from low to high, there is a critical roll speed that begins to appear layered. When the roll speed is low, the billet is easy to form holes; when the roll speed is h印花地坪igh, the billet and 45# cold-drawn seamless steel pipe are easy to form delamination defects. In order to eliminate the delamination defect of seamless steel tube for billet and 45# structure, the roll speed should be reduced to below the critical roll speed when delamination begins to occur.