Environment-friendly agricultural machinery steel and preparation method thereof

• Main Authors: ZHAO MENGYING, YU BING, ZHANG SHILONG, HUANG XU, XU BIN, QIU YU, LI BEI, GUO ZIFENG, ZHANG YAN, NIU TAO, BAI FENGXIA
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2023
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to the technical field of steel preparation, in particular to environment-friendly agricultural machinery steel and a preparation method thereof. The steel for the agricultural machinery comprises the following chemical components: C, Si, Mn, P, S, Cr, B, La, Ce and Fe. Wherein the content of C is 0.20%-0.36% by mass, the content of Si is 0.10%-0.40% by mass, the content of Mn is 1.0%-1.5% by mass, the content of P is smaller than or equal to 0.015% by mass, the content of S is smaller than or equal to 0.010% by mass, the content of Cr is 0.3%-0.8% by mass, the content of B is 20 ppm to 50 ppm, and the total content of La and Ce is 30 ppm to 200 ppm. And in post-treatment, under the condition that the quality of the steel plate is guaranteed, water can be adopted as a quenching medium to replace oil, green production is met, and the technical problems that existing steel grade production is serious in pollution and large in environmental protection pressure are solved. 本申请涉及钢材制备技术领域，尤其涉及