What are the factors affecting the machinability of die steel?

切削性(可加工性，机械加工性)与切削性能相同，是指金属材料被工具切削后成为合格工件的难易程度。那么影响模具钢切削加工性的因素有哪些呢？

Machinability (machinability, machinability) is the same as cutting performance, which refers to the difficulty of metal materials to become qualified workpieces after being cut by tools. So what are the factors affecting the machinability of die steel?

1.化学成分:钢的合金成分越高，越难加工。当碳含量增加时，金属切削性能会降低。

1. Chemical composition: the higher the alloy composition of steel, the more difficult it is to process. When the carbon content increases, the metal cutting performance will decrease.

2.钢结构:不同的结构影响金属切削性能，如锻造、铸造、挤压、轧制和机械加工，锻件和铸件具有非常难加工的表面。

2. Steel structure: different structures affect metal cutting performance, such as forging, casting, extrusion, rolling and machining. Forgings and castings have surfaces that are very difficult to machine.

3.硬度:硬度是影响金属切削性能的重要因素。一般规律是钢越硬，越难加工。高速钢(HSS)可用于加工硬度为330-400HB的材料。高速钢+TiN涂层，可加工硬度45HRC的材料；对于硬度为65-70HRC的材料，使用硬质合金、陶瓷、金属陶瓷和立方氮化硼(CBN)。

3. Hardness: hardness is an important factor affecting metal cutting performance. The general rule is that the harder the steel is, the harder it is to process. High speed steel (HSS) can be used to process materials with hardness of 330-400hb. High speed steel + tin coating, which can process materials with hardness of 45hrc; For materials with hardness of 65-70hrc, cemented carbide, ceramics, cermets and cubic boron nitride (CBN) are used.

4.非金属杂质:一般对工具寿命有不利影响。例如，纯陶瓷的Al2O3(氧化铝)具有很高的研磨性。

4. Non metallic impurities: generally have adverse effects on tool life. For example, Al2O3 (alumina) of pure ceramics has high abrasiveness.

5.残余应力:残余应力会引起金属切削性能问题，一般建议粗加工后进行应力去除。

5. Residual stress: residual stress will cause metal cutting performance problems. It is generally recommended to remove the stress after rough machining.

铸铁的切削特点是什么？

What are the cutting characteristics of cast iron?

一般来说，铸铁的硬度和强度越高，金属切削性能越低，刀片和刀具的预期寿命越低。金属切削生产中使用的大多数类型的铸铁一般都具有良好的金属切削性能。金属的可加工性与组织有关，越硬的珠光体铸铁越难加工。石墨片铸铁和可锻铸铁具有优良的切削性能，而球墨铸铁的切削性能很差。

Generally speaking, the higher the hardness and strength of cast iron, the lower the metal cutting performance and the lower the life expectancy of blades and tools. Most types of cast iron used in metal cutting production generally have good metal cutting properties. The machinability of metal is related to the structure. The harder the pearlite cast iron is, the more difficult it is to process. Graphite cast iron and malleable cast iron have excellent cutting performance, while nodular cast iron has poor cutting performance.

通常，加工铸铁所需的典型工具属性是:

Typically, the typical tool properties required to process cast iron are:

热硬度和化学稳定性高，还与工艺、工件和切削条件有关；切削刃需要具有韧性、抗热疲劳耐磨性和刃强度。切削铸铁的满意程度取决于切削刃的磨损如何发展:快速变钝是指切削刃由于热裂纹和缺口、工件损坏、表面质量差、波纹度过大等原因而过早断裂。正常侧面磨损。保持平衡和锋利的刀刃是我们通常需要努力实现的。

High thermal hardness and chemical stability, also related to process, workpiece and cutting conditions; The cutting edge needs to have toughness, thermal fatigue resistance, wear resistance and edge strength. The satisfaction of cutting cast iron depends on how the wear of the cutting edge develops: rapid blunting refers to the premature fracture of the cutting edge due to thermal cracks and notches, workpiece damage, poor surface quality, excessive ripple and other reasons. Normal side wear. Maintaining balance and sharp edges is what we usually need to strive to achieve.

以上就是今天带给大家的知识，济南模具钢专注行业多年，为用户不断的提供有价值的内容，更多内容请继续关注我们：https://www.jnqhmj.com

The above is the knowledge brought to you today. Jinan die steel has focused on the industry for many years and continuously provided users with valuable content. Please continue to pay attention to us for more content: https://www.jnqhmj.com