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            當前位置:首頁>新聞中心>新聞動態>影響模具鋼可切削性的因素有哪些呢?

            影響模具鋼可切削性的因素有哪些呢?

            來源:http://www.environmentandpeople.net/ 日期:2021-03-22 發布人:admin


            模具鋼的切削加工性(可切削性,機械加工性)同切削加工性能,指金屬材料被刀具切削加工后而成為合格工件的難易程度。那么影響模具鋼可切削性的因素有哪些呢?
            The machinability (machinability, machinability) of die steel is the same as the machinability, which refers to the degree of difficulty for metal materials to become qualified workpieces after being cut by cutting tools. So what are the factors that affect the machinability of die steel?
            1.化學成分:鋼的合金成分越高,就越難加工,當碳含量增加時,金屬切削性能就下降。
            1. Chemical composition: the higher the alloy composition of steel is, the more difficult it is to process. When the carbon content increases, the metal cutting performance will decline.
            2.鋼的結構:不同的結構影響金屬切削性能,如鍛造.鑄造.擠壓.軋制和已切削加工過的,鍛件和鑄件有非常難于加工的表面。
            2. Steel structure: different structures affect metal cutting performance, such as forging, casting, extrusion, rolling and machined, forging and casting have very difficult machining surface.
            山東模具鋼
            3.硬度:硬度是影響金屬切削性能的一個重要因素,一般規律是鋼越硬,就越難加工。高速鋼(HSS)可用于加工硬度最高為330-400HB的材料;高速鋼+鈦化氮(TiN)涂層,可加工硬度最高為45 HRC的材料;而對于硬度為65-70 HRC的材料,則必須使用硬質合金.陶瓷.金屬陶瓷和立方氮化硼(CBN)。
            3. Hardness: hardness is an important factor affecting metal cutting performance. The general rule is that the harder the steel is, the more difficult it is to machine. High speed steel (HSS) can be used to process materials with hardness up to 330-400hb; high speed steel + titanium nitride (TIN) coating can process materials with hardness up to 45 HRC; for materials with hardness of 65-70 HRC, cemented carbide, ceramics, cermet and cubic boron nitride (CBN) must be used.
            4.非金屬參雜:一般對刀具壽命有不良影響。例如Al2O3(氧化鋁),它是純陶瓷,有很強的磨蝕性。
            4. Nonmetal impurity: generally, it has adverse effect on tool life. For example, Al2O3 (alumina), which is a pure ceramic, has strong abrasiveness.
            5.殘余應力:殘余應力能引起金屬切削性能問題,一般推薦在粗加工后進行應力釋放工序。
            5. Residual stress: residual stress can cause metal cutting performance problems, and it is generally recommended to carry out the stress release process after rough machining.
            鑄鐵的切削特性是什么?
            What are the cutting characteristics of cast iron?
            一般來說,鑄鐵的硬度和強度越高,金屬切削性能越低,從刀片和刀具可預期的壽命越低,用于金屬切削生產的鑄鐵其大部分類型的金屬切削性能一般都很好。金屬切削性能與結構有關,較硬的珠光體鑄鐵其加工難度也較大。片狀石墨鑄鐵和可鍛鑄鐵有優良的切削屬性,而球墨鑄鐵相當不好。
            Generally speaking, the higher the hardness and strength of cast iron, the lower the metal cutting performance, and the lower the life expectancy of blade and cutter. Most types of metal cutting performance of cast iron used in metal cutting production are generally very good. The cutting performance of metal is related to the structure, and the hard pearlite cast iron is difficult to process. Flake graphite cast iron and malleable cast iron have excellent cutting properties, while nodular cast iron is rather poor.
            一般對加工鑄鐵所要求的典型刀具屬性為:
            Generally, the typical tool properties required for processing cast iron are as follows:
            高熱硬度和化學穩定性,但也與工序.工件和切削條件有關;要求切削刃有韌性.耐熱疲勞磨損和刃口強度。切削鑄鐵的滿意程度取決于切削刃的磨損如何發展:快速變鈍意味著產生熱裂紋和缺口而使切削刃過早斷裂,工件破損,表面質量差,過大的波紋度等。正常的后刀面磨損,保持平衡和鋒利的切削刃正是一般需要努力做到的。
            High thermal hardness and chemical stability, but also related to process, workpiece and cutting conditions; the cutting edge is required to have toughness, thermal fatigue wear and edge strength. The satisfaction of cutting cast iron depends on how the wear of the cutting edge develops: rapid blunting means hot cracks and notches, resulting in premature fracture of the cutting edge, workpiece damage, poor surface quality, excessive waviness, etc. Normal flank wear, maintaining balance and sharp cutting edge is the general need to strive to achieve.

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