Ultrahigh-strength precipitation strengthening steel and preparation process and application thereof
A technology of precipitation strengthening and preparation process, applied in the field of steel production, can solve the problems of heavy tank body, poor wear resistance and corrosion resistance, cracking, etc. Effect
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[0084] The present invention provides 8 embodiments and 2 comparative examples.
[0085] The chemical composition of a steel for an ultra-high-strength stirring tank is: C: 0.17%-0.22%; Si: 0.35%-0.55%; Mn: 1.70%-2.00%; Alt: 0.015-0.060%; P: ≤ 0.015%; S: ≤ 0.004%; Cr: 0.30% ~ 0.60%; Ti: 0.18% ~ 0.26%, B: 0.0007-0.0018%, Sn: 0.035 ~ 0.055%, the rest is iron and unavoidable impurities.
[0086] The concrete smelting chemical composition of embodiment 1-8 and comparative example 1,2 is shown in Table 1:
[0087] The slab chemical composition (%) of table 1 embodiment 1-8 and comparative example 1,2
[0088] serial number C Si mn P S Alt Ti Cr B sn Example 1 0.18 0.40 1.83 0.010 0.002 0.032 0.19 0.52 0.0009 0.040 Example 2 0.19 0.42 1.96 0.009 0.003 0.038 0.20 0.45 0.0012 0.035 Example 3 0.20 0.55 1.70 0.011 0.002 0.041 0.25 0.30 0.0017 0.042 Example 4 0.22 0.48 1.79 0.012 0.003 0.035 0.18 0.42 0....
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