在对轧钢刀片进行锻造时，需有适当的压缩比，使钢中的碳化物细化并使之分布均匀，保证钢中网状碳化物大部分被破碎。锻造过程中，应该注意这两点：终锻温度过高，锻后易形成碳化物网，终锻温度过低，钢的塑性变坏，易生成小裂纹。
退火是为了使渗碳体呈球状并均匀分布，球化退火的加热温度范围一般为730～800℃。加热过程中一部分渗碳体溶于奥氏体，残留的渗碳体自发地趋于球形以减小表面能。随后的缓慢冷却过程中继续析出的渗碳体也接近球状，因而获得细而均匀分布的球状珠光体。
碳钢的轧钢刀片正常淬火加热温度为Ac1+30-50℃，属于不完全淬火。在淬火温度升高时，最初，强度和塑性有些提高，但当淬火温度超过一定限度后，强度及塑性都迅速下降。制造轧钢刀片需要有一个最佳淬火温度，超过这个淬火温度，其强度和塑性都明显下降。
轧钢刀片淬火后应立即回火。回火温度因刀片的种类与用途而稍有差异。平刃通常采用180～210℃，异形刀片采用200～250℃的炉温进行回火。
碳钢的化学成分：一般情况下，含碳量越高的钢材耐磨性越好，而韧性越差。为了使轧钢刀片有足够高的硬度及较好的耐磨性，使用的碳钢一般含碳量为0.65-1.35%C。随着钢材牌号的数字的升高，钢的硬度与耐磨性增高，而韧性逐渐下降。常用的碳钢有T7、T8、T9、T10、T11、T12及T13等等。在碳素工具钢中，锰含量过高会使钢的韧性下降，不过，含有少量（0.35-0.60%）的可提高钢的淬透性； 硅可提高钢的淬透性，而硫、磷等化学元素对钢材有害，应严格控制其含量。
本文由金属剪切机、废钢打包机厂家江阴市鸣澄液压机械有限公司整理提供，更多资讯请访问：www.jsmcyy.com
On rolling blade forging, needs to have proper compression ratio, the carbides in the steel refinement and uniform distribution, ensure that most of the carbide network in steel was broken. Forging process, should pay attention to these two points: the final forging temperature is too high, easy to form carbide network after forging, finish forging temperature is too low, steel plastic deteriorate, breeds into small cracks.
Annealing is to make cementite spherical and uniform distribution, the spheroidizing annealing temperature range is generally 730 ~ 800 ℃. Part of cementite in the heating process in austenite, the remaining cementite tend to spontaneously spherical to reduce the surface energy. Then continue to precipitate in the process of slow cooling of the cementite is close to the ball, thus obtain fine and uniform distribution of spheroidal pearlite.
Carbon steel rolling blade quenching heating temperature for normal Ac1 + 30-50 ℃, belong to incomplete hardening. When quenching temperature, at first, some improve the strength and plasticity, but exceed certain limit when the quenching temperature, strength and plasticity are falling fast. Manufacturing of steel rolling blade needs to have a best quenching temperature, more than the quenching temperature, the strength and plasticity are markedly reduced.
For steelrolling should immediately after quenching tempering. Tempering temperature is slightly different because of the kinds and application of the blade. Flat blade usually adopt 180 ~ 210 ℃, special-shaped blade USES the tempering temperature of 200 ~ 250 ℃.
The chemical composition of carbon steel: in general, the higher the carbon content of steel, wear resistance, the better the toughness, the worse. In order to make the steel rolling blade have enough high hardness and good wear resistance, the use of carbon steel in general carbon content is 0.65-1.35% C. With the increase of steel grade of digital, higher hardness and wear resistance of steel, and tough gradually decline. Common carbon steel with T7 has, T8, T9, and T10, T11, T12 and T13 and so on. In carbon tool steel, high manganese content can reduce the toughness of the steel, however, contains a small amount (0.35 0.60%) can improve the hardenability of steel; Silicon can improve the hardenability of steel, and the chemical elements such as sulphur, phosphorus is harmful to the steel, should be strictly control its content.
