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新型干法大中磨机衬板使用寿命为三四年
①温速度：从150℃开始以每小时80℃~100℃的速度升温，升到650℃保温一两个小时，然后以每小时120℃~150℃的速度升温（或随炉升温）。
① temperature speed: start from 150 ℃ and heat up at 80 ℃ ~ 100 ℃ per hour, rise to 650 ℃ for one or two hours, then heat up at 120 ℃ ~ 150 ℃ per hour (or heat up with the furnace).
②淬火温度：850℃~900℃，保温时间按铸件厚度每25mm保温1小时计算，并根据装炉情况适当延长保温时间。
② quenching temperature: 850 ℃ ~ 900 ℃, and the heat preservation time is calculated according to the thickness of the casting every 25 mm for 1 hour, and the heat preservation time is appropriately extended according to the charging condition.
③淬火介质：采用油淬，在油中停留时间按铸件每毫米厚度10秒计算，50mm厚应该八九分钟，出油后再风冷8分钟~10分钟，铸件200℃以下停风立即装炉回火。
③ quenching medium: oil quenching is adopted. The residence time in the oil is calculated by 10 seconds per millimeter of the thickness of the casting. The thickness of 50 mm should be 89 minutes. After the oil is discharged, air cooling should be carried out for 8 minutes to 10 minutes. The casting should be put into the furnace for tempering immediately when the air is stopped below 200 ℃.
④风冷时采用轴流风机，风量2万立方米/时；风压>300kPa；转速2940转/分；功率2.5/3kW。
④ axial flow fan is used for air cooling, with air volume of 20000 m3 / h; air pressure > 300kPa; rotational speed of 2940 rpm; power of 2.5/3kw.
⑤回火：油淬后回火温度200℃~300℃；6小时~10小时，空冷。
⑤ tempering: after oil quenching, the tempering temperature is 200 ℃ ~ 300 ℃; 6 hours ~ 10 hours, air cooling.
按照确定的化学成分认真进行操作，从熔炼、铸造、热处理及清整工艺等方面，在掌握基本理论的基础上，按照制定的工艺规则精细操作，使该钢种的金相组织为马氏体及少量贝氏体组织；机械性能达到硬度HRC48-55；冲击韧性ak20-50J/cm2；新型干法大中磨机衬板使用寿命为三四年，可满足水泥工业生产的需要。
Operate carefully according to the determined chemical composition, from the aspects of smelting, casting, heat treatment and cleaning process, on the basis of mastering the basic theory, operate carefully according to the established process rules, so that the metallographic structure of the steel is martensite and a small amount of bainite; the mechanical property reaches the hardness of hrc48-55; the impact toughness of ak20-50j / cm2; the use of lining plate of new dry process large and medium-sized mill The service life is three or four years, which can meet the needs of cement industry.
① temperature speed: start from 150 ℃ and heat up at 80 ℃ ~ 100 ℃ per hour, rise to 650 ℃ for one or two hours, then heat up at 120 ℃ ~ 150 ℃ per hour (or heat up with the furnace).
②淬火温度：850℃~900℃，保温时间按铸件厚度每25mm保温1小时计算，并根据装炉情况适当延长保温时间。
② quenching temperature: 850 ℃ ~ 900 ℃, and the heat preservation time is calculated according to the thickness of the casting every 25 mm for 1 hour, and the heat preservation time is appropriately extended according to the charging condition.
③淬火介质：采用油淬，在油中停留时间按铸件每毫米厚度10秒计算，50mm厚应该八九分钟，出油后再风冷8分钟~10分钟，铸件200℃以下停风立即装炉回火。
③ quenching medium: oil quenching is adopted. The residence time in the oil is calculated by 10 seconds per millimeter of the thickness of the casting. The thickness of 50 mm should be 89 minutes. After the oil is discharged, air cooling should be carried out for 8 minutes to 10 minutes. The casting should be put into the furnace for tempering immediately when the air is stopped below 200 ℃.
④风冷时采用轴流风机，风量2万立方米/时；风压>300kPa；转速2940转/分；功率2.5/3kW。
④ axial flow fan is used for air cooling, with air volume of 20000 m3 / h; air pressure > 300kPa; rotational speed of 2940 rpm; power of 2.5/3kw.
⑤回火：油淬后回火温度200℃~300℃；6小时~10小时，空冷。
⑤ tempering: after oil quenching, the tempering temperature is 200 ℃ ~ 300 ℃; 6 hours ~ 10 hours, air cooling.
按照确定的化学成分认真进行操作，从熔炼、铸造、热处理及清整工艺等方面，在掌握基本理论的基础上，按照制定的工艺规则精细操作，使该钢种的金相组织为马氏体及少量贝氏体组织；机械性能达到硬度HRC48-55；冲击韧性ak20-50J/cm2；新型干法大中磨机衬板使用寿命为三四年，可满足水泥工业生产的需要。
Operate carefully according to the determined chemical composition, from the aspects of smelting, casting, heat treatment and cleaning process, on the basis of mastering the basic theory, operate carefully according to the established process rules, so that the metallographic structure of the steel is martensite and a small amount of bainite; the mechanical property reaches the hardness of hrc48-55; the impact toughness of ak20-50j / cm2; the use of lining plate of new dry process large and medium-sized mill The service life is three or four years, which can meet the needs of cement industry.
