A kind of martensitic precipitation hardening stainless steel and its preparation method and application
A precipitation hardening, stainless steel technology, applied in the field of alloy steel manufacturing, can solve the problems of low strength, unable to meet the needs of stainless steel strength use, etc., to achieve the effect of improving purity, reducing inclusions in steel, and optimizing the preparation process
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Embodiment 1
[0045] This embodiment provides a martensitic precipitation hardening stainless steel, the chemical composition of the martensitic precipitation hardening stainless steel includes: C: 0.045%; Si: 1.62%; Mn: 0.72%; P: 0.025%; S : 0.0015%; Cr: 14.3%; Ni: 7.1%; Al: 0.04~0.06%; Mo: 0.65%; Cu: 0.82%; N: 0.01%; Ti: 0.32%; the balance is iron and other unavoidable Impurities. The martensitic precipitation hardening stainless steel is obtained by smelting, continuous casting, hot rolling, hot annealing pickling, cold rolling, cold rolling annealing pickling, smoothing and aging of the raw materials of martensitic precipitation hardening stainless steel; specifically:
[0046] A. Smelting and continuous casting: Through EAF+AOD+VOD+CCP, VOD adopts vacuum decarburization technology, vacuum stirring for 73 minutes, the inclusions in the steel are fully floating, effectively reducing the inclusions in the steel, using Al deoxidation to further reduce the Total in the steel[ O], thereby r...
Embodiment 2
[0054] This embodiment provides a martensitic precipitation hardening stainless steel, the chemical composition of the martensitic precipitation hardening stainless steel includes: C: 0.043%; Si: 1.74%; Mn: 0.77%; P: 0.0235%; S : 0.0020%; Cr: 14.5%; Ni: 7.17%; Al: 0.111%; Mo: 0.75%; Cu: 0.86%; N: 0.01%; Ti: 0.225%; the balance is iron and other inevitable impurities. The martensitic precipitation hardening stainless steel is obtained by smelting, continuous casting, hot rolling, hot annealing pickling, cold rolling, cold rolling annealing pickling, smoothing and aging of the raw materials of martensitic precipitation hardening stainless steel; specifically:
[0055] A. Smelting and continuous casting: Through EAF+AOD+VOD+CCP, VOD adopts vacuum decarburization technology, vacuum stirring for 73 minutes, the inclusions in the steel are fully floating, effectively reducing the inclusions in the steel, using Al deoxidation to further reduce the Total in the steel[ O], thereby redu...
Embodiment 3
[0063] This embodiment provides a martensitic precipitation hardening stainless steel, the chemical composition of the martensitic precipitation hardening stainless steel includes: C: 0.0557%; Si: 1.713%; Mn: 0.7%; P: 0.025%; S : 0.0016%; Cr: 14.4%; Ni: 7.14%; Al: 0.045%; Mo: 0.62%; Cu: 0.77%; N: 0.0068%; Ti: 0.34%; the balance is iron and other inevitable impurities. The martensitic precipitation hardening stainless steel is obtained by smelting, continuous casting, hot rolling, hot annealing pickling, cold rolling, cold rolling annealing pickling, smoothing and aging of the raw materials of martensitic precipitation hardening stainless steel; specifically:
[0064] A. Smelting and continuous casting: Through EAF+AOD+VOD+CCP, VOD adopts vacuum decarburization technology, vacuum stirring for 73 minutes, the inclusions in the steel are fully floating, effectively reducing the inclusions in the steel, using Al deoxidation to further reduce the Total in the steel[ O], thereby red...
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