適于美國市場的半掛汽車車軸用無縫鋼管的研制

R & D of Seamless Steel Tube for Semi-trailer Axle Service Suitable for US Market

摘要: 根據(jù)美國市場對半掛汽車車軸用無縫鋼管的特殊要求，有針對性地進行成分設(shè)計、生產(chǎn)工藝制定和熱處理制度的研究，對熱軋態(tài)和熱處理后的半掛汽車車軸用無縫鋼管性能、硬度進行檢測。指出750℃入爐保溫3 min，隨爐升溫至910℃保溫6 min后進行水淬；接著進行560℃回火，保溫60 min后出爐空冷，是生產(chǎn)滿足美國市場的半掛汽車車軸用無縫鋼管要求的最佳熱處理制度。

Abstract: Following the special requirements for the seamless steel tube for semi-trailer axle purpose by the US market, the chemical composition, the manufacturing process and the heat treatment schedule are accordingly designed and determined, while testing and inspections are conducted to the as-hot rolled and as-heat treated seamless steel tubes for semi-trailer axle service for their properties and hardness.It is concluded that the following heat treatment schedule should be deemed as the best one to satisfy the requirements by the US market for the seamless steel tube for semi-trailer axle purpose.First the tube is held in the furnace at 750℃ for 3 minutes, then held for 6 minutes along with the temperature going up to 910℃, and water quenched.Afterwards, the tube is immediately tempered at 560℃, then held for 60 minutes, and finally, after leaving the furnace, air cooled.