Particle-strengthened hot-rolled seamless steel pipe tandem mill composite roll and preparation method thereof
A technology of composite roll and seamless steel pipe, applied in the field of roll manufacturing, to meet the requirements of service conditions, improve service life, and improve the effect of spheroidization
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Embodiment 1
[0022] Refer to attached figure 1 And attached figure 2 , This embodiment is for the manufacture of Φ250 hot-rolled seamless steel pipe unit three-roll G1 continuous roll. The billet weight is 854kg, and the theoretical casting weight of the working layer part of the roller body is 314kg.
[0023] The matrix composition of this embodiment is: C: 3.6%, Si: 2.1%, Mn: 0.32%, P: 0.017%, S: 0.014%, Cu: 0.25%, Mg: 0.05%; the proportion of composite particles is: TiC 16kg, WC 16kg, Ni powder 2kg, Nb powder 2kg, industrial reduced iron powder 28kg, bismuth powder 0.02kg, antimony powder 0.012kg. The above-mentioned material ratio is put into a ball mill and stirred for 2 hours to make it evenly mixed to form a mixed material, which is pressed into a 5-10mm composite particle block and preheated to 350-400°C for use.
[0024] A steel parting ring 3 is designed to separate the mold cavity of the composite roll slab, and is prepared into two parts, the working layer 1 of the roll bod...
Embodiment 2
[0029] refer to figure 1 with figure 2 , This example is to use different matrix composition ratios to manufacture Φ250 hot-rolled seamless steel pipe unit three-roll G3 continuous rolling roll. The billet weight is 845kg, and the casting theoretical weight of the working layer 1 part of the roll body is 310kg.
[0030] The matrix components of this example are: C: 3.7%, Si: 1.8%, Mn: 0.35%, P: 0.015%, S: 0.010%, Cu: 0.20%, Mg: 0.045%; the composite particles are respectively: TiC 8kg , WC 8kg, Ni powder 1kg, Nb powder 1kg, industrial reduced iron powder 14kg, bismuth powder 0.018kg, antimony powder 0.014kg; the above raw materials were put into a ball mill and stirred for 2 hours to make them evenly mixed and pressed into 5-10mm Small pieces of composite particles, and these small pieces are preheated to 350 ~ 400 ° C for use.
[0031] A steel parting ring 3 is used to separate the cavity of the billet into two parts, the working layer 1 of the roll body and the mandrel 4...
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Abstract
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