热处理对蒸汽锅炉炉排片性能的影响

Influence of Heat Treatment on Properties of Furnace Grate

为了提高长期使用在 90 0℃下的炉排片的冷加工性能 ,通过调整 C、Ni含量和热处理工艺的试验 ,找出了其最佳成分 (% )为 :C1.5～ 2 .0、Si<1、Mn<1、P≤ 0 .0 40、S≤ 0 .0 40、Cr12～ 18、Ni0 .3～ 1.0 (质量分数 ,下同 )。首先对试样进行 10 0 0℃保温 8h炉冷至 80 0℃ ,再以 15℃ /h的冷却速度冷至 70 0℃保温 8h后炉冷的热处理 ,然后进行冷加工。

By adjusting C and Ni contents and heat treatment parameter, the optimum composition of furnace grate was found to raise the machining property of furnace grate of long period used at 900 ℃. The optimum values are: C 1.5 %～2.0 %、 Si<1 %、 Mn<1 %、P≤0.040 %、S≤0.040 %、 Cr 12 %～18 %、Ni 0.3 %～1.0 %. The heat treatment parameters before machining are as follows: holding 8 h at 1 000 ℃, cooling to 800 ℃ in the furnace; cooling to 700 ℃ at the rate of 15 ℃/h and holding 8 h; cooling to room temperature in the furnace.