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1、高铬铸铁High chromium cast iron高铬铸铁是高铬白口抗磨铸铁的简称，是一种性能优良而受到特别重视的抗磨材料。它以比合金钢高得多的耐磨性，和比一般白口铸铁高得多的韧性、强度，同时它还兼有良好的抗高温和抗腐蚀性能，加之生产便捷、成本适中，而被誉为当代最优良的抗磨料磨损材料之一。高铬铸铁属金属耐磨材料、抗磨铸铁类铬系抗磨铸铁的一个重要分支，是继普通白口铸铁、镍硬铸铁而发展起来的第三代白口铸铁。早在 1917 年就出现了第一个高铬铸铁专利。高铬铸铁一般泛指含 Cr 量在 11-30%之间，含 C 量在 2.0-3.6%之间的合金白口铸铁。High chromium cast iro
2、n is of high chromium white cast irons for short, is an excellent performance and highly wear resistant material. Its wear resistance is much higher than the alloy steel, and much higher than the general white cast iron toughness, strength, and it also has good resistance to high temperature and cor
3、rosion resistance, and convenient manufacture, low cost, and is regarded as the most excellent abrasive resistant materials.An important branch of high chromium cast iron metal wear resistant materials, antiwear cast iron chromium wear resistant cast iron, is the third generation of white cast iron
4、after the general white cast iron, Ni hard cast iron and developed. As early as in 1917, the first high chromium cast iron patent. High chromium cast iron generally refers to the content of Cr in 11-30%, C content in 2.0-3.6% alloy white cast iron.美国高铬铸铁执行标准为 ASTMA532M，英国为 BS4844，德国为 DIN1695，法国为NFA3
5、2401。俄罗斯在前苏联时期曾研制了 12-15%Cr、3-5.5%Mn，壁厚达 200mm 的球磨机衬板，现执行 OCT7769 标准。特别值得一提的是在近一个世纪里，曾为抗磨白口铸铁做出了卓越贡献的美国克莱梅克斯（Climax）钼业公司。1928 年该公司首先发明了镍硬铸铁，把抗磨铸铁科技推向了一个空前高度。1974 年为纪念国际 GIFA，在杜赛尔多夫展览会上展示了名为“神秘 1 号”和“神秘 2 号” 。即经典的高铬抗磨铸铁 153（Cr15Mo3 ）和1521（Cr15Mo2Cu） ，现如今克莱梅克斯公司执行高铬铸铁标准如下，The implementation of standar
6、ds American high chromium cast iron, ASTMA532M, British BS4844, German DIN1695, French NFA32401. Russia in the former Soviet Union had developed 12-15%Cr, 3-5.5%Mn, wall thickness of 200mm ball mill lining board, the executive OCT7769 standard. It is particularly worth mentioning is in nearly a cent
7、ury, has made the remarkable contribution for the wear resistant white cast iron American clay Mexes (Climax) molybdenum industry company. In 1928 the company invented the first Ni hard cast iron, the abrasion resistant cast iron technology to an unprecedented height. In 1974 to commemorate the inte
8、rnational GIFA, in Duesseldorf exhibition called mysterious No. 1 and mysterious No. 2. High chromium iron is the classic 153 (Cr15Mo3) and 1521 (Cr15Mo2Cu), now the clay Mexes executive high chromium cast iron standard as follows:用途: 在采矿、水泥、电力、筑路机械、耐火材料等方面应用十分广泛，常见于衬板，锤头，磨球材质。Uses: in the mining, c
9、ement, electricity, road machinery, refractory material has been widely used, common in the lining plate, hammer, grinding ball material.高铬铸铁热处理工艺化学成分:C2.05，Si1.40，Mn0.78 ，Cr20.03，Ni0.81，Mo0.35 常用的高铬铸铁的热处理工艺是加热到 9501000，经保温空冷淬火后再进行 200260的低温回火。2、高温团球化处理 11401180保温 16h 空冷却，可以明显提高冲击韧度和耐磨性能。高温团球化处理可使碳化
10、物全部呈团球状，可消除或减少大块状和连续网状碳 化物对基体的隔裂作用，经团球化的碳化物受到更加均匀的基体支撑，特别受到一定数量的奥氏体的支撑。如果适当减少保温时间，对薄截面零件也可以取得效果。该工艺的不足是工艺消耗热能较多。加热到 1050，经保温空淬火后再进行 550的回火,效果会怎么样?要控制加热速度，最好在650 750 850 时保温一定时间。我以前做过，正火就可以了。硬度能做到61-65HRC 成熟工艺是：铸造后软化退火，便于加工，加工后空冷淬火加低温去应力回火。使用硬度一般要求为 HRC58-62，多用于比如渣浆泵零部件等耐磨易损件。我们这里是高铬生产基地，一般提供 Cr20、Cr
11、24，Cr26，Cr28，Cr15Mo3 等，价格是不便宜的。 要包括中间的软化退火和精加后的淬火及回火。 要求硬度 HRC58 我们现在用的是淬火液淬火，淬火工艺参数是：650 度保温 2 小时，升温到 960 度保温 3.5 小时淬火；回火温度 380400，保温 46 小时。磨球规格 40-80。工艺是 1050 淬火+250350 回火。Heat treatment of high chromium cast ironChemical composition: C2.05, Si1.40, Mn0.78, Cr20.03, Ni0.81, heat treatment process
12、of Mo0.35 common high chromium cast iron is heated to a temperature of 9501000 , 200260 low temperature tempering heat air quenched after the. 2, the high temperature spheroidization of 11401180 16h air cooling, can significantly improve the impact toughness and wear resistance. High temperature sph
13、eroidization of carbides can make all showed nodular, can eliminate or reduce the massive and continuous network of carbon compounds on the substrate cleavage, the spheroidization of carbides was more homogeneous matrix support, particularly by a certain amount of austenite support. If appropriate t
14、o reduce the holding time, the thin section parts can also be achieved effect. This process is process consumes more heat. Heated to 1050 , 550 heat air quenching and tempering, the outcome will be? To control the heating speed, the best heat preservation time in 650750850. I have done before, norma
15、lizing can. Hardness can do 61-65HRC maturation process is: annealing, softening after casting machining, machining of air cooling after quenching and low temperature stress tempering. The use of hardness of the general requirements for HRC58-62, such as multi for slurry pump parts wearing parts wea
16、r. Here is the high chromium production base, generally provide Cr20, Cr24, Cr26, Cr28, Cr15Mo3 and so on, the price is not cheap. To include the quenching and tempering intermediate softening annealing and finishing after. We now use the hardness of HRC58 is quenched liquid quenching, quenching process parameters are: 650 degrees for 2 hours, up to 960 degree 3.5 hours holding quenching; tempering temperature of 380400, heat 4
