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        當前位置:首頁>新聞中心>新聞動態>冷作模具鋼相關專業知識幾個問題看出

        冷作模具鋼相關專業知識幾個問題看出

        來源:http://www.environmentandpeople.net/ 日期:2022-06-21 發布人:guanli


        冷作模具鋼的切削工藝有哪些?
        What are the cutting processes of cold working die steel?
        冷作模具鋼大多數切削加工都較困難,為了獲得良好的切削加工性,需要正確進行熱處理,對于表面質量要求較高的模具可選用含S、Ca等元素的易切削模具鋼。熱處理工藝性主要包括:淬透性、淬硬性、耐回火性、過熱敏感性、氧化脫碳傾向、淬火變形和開裂傾向等。下面就來看下冷作模具鋼相關專業知識四個問題吧。
        Most cold working die steels are difficult to cut. In order to obtain good machinability, proper heat treatment is required. For dies with high surface quality requirements, free cutting die steels containing s, Ca and other elements can be selected. Heat treatment processability mainly includes: hardenability, hardenability, resistance to reheating, overheating sensitivity, oxidation decarburization tendency, quenching deformation and cracking tendency, etc. Let's take a look at the four problems related to cold working die steel.
        什么是冷作模具鋼受熱軟化能力?
        What is the heat softening ability of cold working die steel?
        受熱軟化能力反映了冷作模具鋼在承載時溫升對硬度、變形抗力及耐磨性的影響。表征冷作模具鋼受熱軟化抗力的指標主要有軟化溫度(℃)和二次硬化硬度(HRC)。咬合抗力實際就是對發生“冷焊”的抵抗能力。
        The heat softening ability reflects the influence of temperature rise of cold working die steel on hardness, deformation resistance and wear resistance. Softening temperature (℃) and secondary hardening hardness (HRC) are the main indicators to characterize the thermal softening resistance of cold working die steel. Bite resistance is actually the resistance to "cold welding".
        冷作模具鋼
        通常在干摩擦條件下,把被試驗模具鋼試樣,與具有咬合傾向的材料(如奧氏體鋼),進行恒速對偶摩擦運動,以一定速度逐漸增大載荷,此時轉矩也相應增大。當載荷加大到某一臨界值時,轉矩突然急劇增大,這意味著發生咬合,這一載荷稱為“咬合臨界載荷”。
        Generally, under dry friction conditions, the tested die steel sample and the material with bite tendency (such as austenitic steel) are subject to constant speed dual friction movement, and the load is gradually increased at a certain speed, at this time, the torque is also correspondingly increased. When the load increases to a certain critical value, the torque suddenly increases sharply, which means that the bite occurs. This load is called "bite critical load".
        臨界載荷越高,標志著咬合抗力越強。冷作模具鋼的工藝性能,直接關系到模具的制造周期及制造成本。對冷作模具鋼的工藝性能要求,主要有鍛造工藝性、切削工藝性、熱處理工藝性等。
        The higher the critical load, the stronger the bite resistance. The process performance of cold working die steel is directly related to the manufacturing cycle and cost of the die. The process performance requirements of cold working die steel mainly include forging process, cutting process, heat treatment process, etc.
        如何提高冷作模具的抗磨性能?
        How to improve the wear resistance of cold working dies?
        冷作模具在工作時,表面與坯料之間產生許多次摩擦,模具在這種情況下必須仍能保持較低的表面粗糙度值和較高的尺寸精度,以防止早期失效。由于模具材料的硬度和組織是影響模具耐磨性能的重要因素,因此為了提高冷作模具的抗磨性能,通常要求模具硬度高于加工件硬度30%~50%,材料的組織為回火馬氏體或下貝氏體,其上分布均勻、細小的顆粒狀碳化物。
        When the cold working die is working, there are many times of friction between the surface and the blank. In this case, the die must still be able to maintain low surface roughness and high dimensional accuracy to prevent early failure. As the hardness and structure of the die material are important factors affecting the wear resistance of the die, in order to improve the wear resistance of the cold working die, the die hardness is usually required to be 30% ~ 50% higher than the hardness of the machined part. The structure of the material is tempered martensite or lower bainite, on which are evenly distributed and fine granular carbides.
        冷作模具的強度指標有哪些?
        What are the strength indexes of cold working dies?
        強度指標是冷作模具鋼設計和材料選擇的重要依據,主要包括拉伸屈服點、壓縮屈服點等。屈服點是衡量模具零件塑性變形抗力的指標,也是很常用的強度指標。為了獲得高的強度,在模具制造過程中,要模具材料的韌性,要根據模具工作條件來決定,對于強烈沖擊載荷的模具,如冷作模具的凸模、冷鐓模具等,因受沖擊載荷較大,需要高的韌性。
        Strength index is an important basis for the design and material selection of cold working die steel, mainly including tensile yield point, compressive yield point, etc. Yield point is an index to measure the plastic deformation resistance of mold parts, and it is also a very common strength index. In order to obtain high strength, the toughness of the die material should be determined according to the working conditions of the die in the process of die manufacturing. For dies with strong impact load, such as punch and cold heading dies of cold working dies, due to large impact load, high toughness is required.
        以上就是今天為大家分享的關于問題的相關內容,希望對大家能有所幫助,想要了解更多內容可以電話聯系我們或者關注我們的網站http://www.jnhgjx.net。
        The above is the relevant content about the problem shared for you today. I hope it can help you. If you want to know more, you can contact us by phone or follow our website http://www.jnhgjx.net 。

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