Fujian sales DN200 national standard straight seam three links Mengcun Zhanpeng manufacturers
The performance of straight seam tees depends primarily on the carbon content and microstructure of the steel. In the annealed or hot rolled state, as the carbon content increases, the strength and hardness of the straight seam tee increase, while the ductility and impact toughness decrease, and the weldability and cold bendability deteriorate. The aging of low carbon steel tees usually has two kinds of quenching aging and strain aging. Straight seam tees are caused by the action of gap elements. Straight seam tees are mainly caused by the redistribution of carbon, nitrogen and oxygen. Straight seam three-way quenching aging is the phenomenon that the performance of carbon steel tee changes rapidly with high temperature after rapid cooling. The carbon content in the straight seam tee steel, the degree of deoxidation of the carbon steel tee and the nitrogen content have a great influence on the quenching aging. The low carbon steel, the insufficiently deoxidized boiling steel and the steel with higher nitrogen content have quenching aging. Significantly, the medium carbon steel with carbon content of about 0.3%, the performance change caused by the quenching aging of the carbon steel tee has been greatly weakened, and the high carbon steel containing about 0.6% of carbon does not actually have an age hardening effect.
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