一、前言钢管生产轧制成材后,有的产品尚需进行热处理,以适应工艺要求和改善钢管机械加工性能。为提高钢管退火质量和生产发展的需要,我厂在无缝钢管车间建造了明火加热辊底式连续热处理炉,具有上马快,可以处理各种高质量的钢材,而且效果显著。它优于间歇式生产的车底式、室式、罩式和外部机械化等热处理炉。经多年生产实践证明,这种炉型在产量和质量上均能满足热处理要求。该炉结构简单,是一种适合我国国情的较好炉型。二、热处理工艺要求及炉型选择辊底式热处理炉是以满足碳素结构钢、低合金结构钢及部份高合金钢的再结晶退火,高温回火等热处理制度。再结晶退火主要用于冷拨,冷拉后的钢管。因为钢材在冷拔、拉后晶 First, the foreword After the production of rolled steel pipe, some products still need to heat treatment to meet the technological requirements and improve the performance of steel pipe machining. In order to improve the annealing quality of steel pipe and the need of production development, our factory built a continuous heat treatment furnace for open hearth heat roller at the seamless steel pipe workshop. It has the advantages of quick loading, high quality steel processing and remarkable effect. It is superior to intermittent production of car type, chamber type, hood and external mechanization and other heat treatment furnace. After years of production practice has proved that this type of furnace in both yield and quality to meet the heat treatment requirements. The furnace structure is simple, is a good furnace for our national conditions. Second, the heat treatment process requirements and furnace type roller hearth heat treatment furnace is to meet the carbon structural steel, low alloy structural steel and some high alloy steel recrystallization annealing, high temperature tempering and other heat treatment system. Recrystallization annealing is mainly used for cold dial, cold-drawn steel. Because the steel is cold drawn, pulled after the crystal