Preparation method of surface nanocrystallization low-alloy steel mold
A low-alloy steel and nano-technology, which is applied in the field of preparation of low-alloy steel moulds, which can solve the problems of shallow compound layer depth, inability to withstand high-speed loads, and inability to withstand heavy loads, so as to reduce types and heat resistance and the effect of improving corrosion resistance and increasing thickness
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Embodiment 1
[0032] Prepare the surface nanometerization low-alloy steel mold of embodiment 1 according to the following steps:
[0033] (1) In terms of weight percentage, prepare low alloy steel with the following components: C 0.09, Cr 1.45, Si 0.40, Mn 0.33, Mo 0.17, Ni 0.15, Nb 0.05, Pd 0.15, P 0.002, S 0.002, The balance is Fe and unavoidable impurities;
[0034] (11) Smelting and pouring: Carry out the electric arc furnace primary smelting, ladle RH treatment and LF treatment in sequence, and control the molten steel to meet the defined chemical composition before pouring. During the ladle refining, argon blowing is carried out at a pressure above 3 atm for at least 5 minutes to effectively Facilitate the floating and removal of impurities;
[0035](12) Rolling: including soaking treatment, rolling and cooling, wherein soaking treatment is soaking in a heating furnace at 1150°C for about 5 hours, the starting temperature of rolling is 1000°C, the final rolling temperature is 850°C, ...
Embodiment 2
[0047] According to the method described in Example 1, but the base salt described in the step (32) is the following components by weight: 100 parts of potassium cyanate, Ce 2 CO 3 3 parts, ZrO 2 3 copies. Obtain the surface nanometerized low-alloy steel mold of embodiment 2.
Embodiment 3
[0049] According to the method described in Example 1, but the base salt described in the step (32) is the following components by weight: 100 parts of potassium cyanate, Ce 2 CO 3 3 parts, CeO 2 3 copies. Obtain the surface nanometerized low-alloy steel mold of embodiment 3.
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