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beplay全站app安卓选材的三个原则!

来源:http://www.jnhjgs.cn     发布时间:2021-02-16 18:00:38    点击:

(一)beplay全站app安卓满足工作条件要求
(1) The die meets the requirements of working conditions
1、耐磨性
1. Wear resistance
坯料在beplay全站app安卓型腔中塑性变性时,沿型腔表面既流动又滑动,使型腔表面与坯料间产生剧烈的摩擦,从而导致beplay全站app安卓因磨损而失效。所以材料的耐磨性是beplay全站app安卓基本、重要的性能之一。
When the blank is plastically denatured in the mold cavity, it flows and slides along the surface of the mold cavity, resulting in severe friction between the surface of the mold cavity and the blank, resulting in the failure of the mold due to wear. So the wear resistance of material is one of the basic and important properties of die.
硬度是影响耐磨性的主要因素。一般情况下,beplay全站app安卓零件的硬度越高,磨损量越小,耐磨性也越好。另外,耐磨性还与材料中碳化物的种类、数量、形态、大小及分布有关。
Hardness is the main factor affecting wear resistance. In general, the higher the hardness of die parts, the smaller the wear, the better the wear resistance. In addition, the wear resistance is also related to the type, quantity, shape, size and distribution of carbides in the material.
2、强韧性
2. Strength and toughness
beplay全站app安卓的工作条件大多十分恶劣,有些常承受较大的冲击负荷,从而导致脆性断裂。为防止beplay全站app安卓零件在工作时突然脆断,beplay全站app安卓要具有较高的强度和韧性。
Most of the working conditions of the dies are very bad, and some of them often bear large impact load, which leads to brittle fracture. In order to prevent the sudden brittle fracture of die parts, the die should have high strength and toughness.
beplay全站app安卓的韧性主要取决于材料的含碳量、晶粒度及组织状态。
The toughness of the die mainly depends on the carbon content, grain size and microstructure of the material.
3、疲劳断裂性能
3. Fatigue fracture property
beplay全站app安卓工作过程中,在循环应力的长期作用下,往往导致疲劳断裂。其形式有小能量多次冲击疲劳断裂、拉伸疲劳断裂接触疲劳断裂及弯曲疲劳断裂。
In the working process of die, under the long-term action of cyclic stress, fatigue fracture is often caused. Its forms are small energy multiple impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture and bending fatigue fracture.
beplay全站app安卓的疲劳断裂性能主要取决于其强度、韧性、硬度、以及材料中夹杂物的含量。
The fatigue fracture performance of the die mainly depends on its strength, toughness, hardness and the content of inclusions in the material.
4、高温性能
4. High temperature performance
当beplay全站app安卓的工作温度较高进,会使硬度和强度下降,导致beplay全站app安卓早期磨损或产生塑性变形而失效。因beplay全站app安卓材料应具有较高的抗回火稳定性,以保证beplay全站app安卓在工作温度下,具有较高的硬度和强度。
When the working temperature of the die is higher, the hardness and strength will decrease, leading to early wear or plastic deformation and failure of the die. Because the die material should have high tempering stability, in order to ensure that the die has high hardness and strength at working temperature.
                     济南beplay全站app安卓
5、耐冷热疲劳性能
5. Cold and hot fatigue resistance
有些beplay全站app安卓在工作过程中处于反复加热和冷却的状态,使型腔表面受拉、压力变应力的作用,引起表面龟裂和剥落,增 大摩擦力,阻碍塑性变形,降低了尺寸精度,从而导致beplay全站app安卓失效。冷热疲劳是热作beplay全站app安卓失效的主要形式之一,帮这类beplay全站app安卓应具有较高的耐冷热疲劳性能。
Some molds are in the state of repeated heating and cooling in the working process, which makes the cavity surface subject to tension and pressure stress, causes surface cracking and spalling, increases friction, hinders plastic deformation, reduces dimensional accuracy, and leads to mold failure. Cold and hot fatigue is one of the main failure modes of hot working dies. This kind of dies should have high cold and hot fatigue resistance.
6、耐蚀性
6. Corrosion resistance
有些beplay全站app安卓如塑料模在工作时,由于塑料中存在氯、氟等元素,受热后分解析出hci、hf等强侵蚀性气体,侵蚀beplay全站app安卓型腔表面,加大其表面粗糙度,加剧磨损失效。
When some moulds, such as plastic moulds, work, because there are chlorine, fluorine and other elements in the plastics, they decompose and precipitate HCI, HF and other strong corrosive gases after heating, which erode the surface of the mould cavity, increase its surface roughness and aggravate the wear failure.
(二)beplay全站app安卓满足工艺性能要求
(2) The die meets the requirements of process performance
beplay全站app安卓的制造一般都要经过锻造、切削加工、热处理等几道工序。为保证beplay全站app安卓的制造质量,降低生产成本,其材料应具有良好的可锻性、切削加工性、淬硬性、淬透性及可磨削性;还应具有小的氧化、脱碳敏感性和淬火变形开裂倾向。
Mold manufacturing generally has to go through forging, cutting, heat treatment and other processes. In order to ensure the manufacturing quality of the die and reduce the production cost, the material should have good malleability, machinability, hardenability, hardenability and grindability, as well as small oxidation, decarbonization sensitivity and quenching deformation cracking tendency.
1、可锻性
1. Malleability
具有较低的热锻变形抗力,塑性好,锻造温度范围宽,锻裂冷裂及析出网状碳化物倾向低。
It has low hot forging deformation resistance, good plasticity, wide forging temperature range, low tendency of forging crack, cold crack and network carbide precipitation.
2、退火工艺性
2. Annealing processability
球化退火温度范围宽,退火硬度低且波动范围小,球化率高。
The spheroidizing annealing temperature range is wide, the annealing hardness is low and the fluctuation range is small, and the spheroidizing rate is high.
3、切削加工性
3. Machinability
切削用量大,刀具损耗低,加工表面粗糙度低。
Large cutting parameters, low tool loss and low surface roughness.
4、氧化、脱碳敏感性
4. Oxidation and decarbonization sensitivity
高温加热时抗氧化怀能好,脱碳速度慢,对加热介质不敏感,产生麻点倾向小。
When heated at high temperature, the oxidation resistance is good, the decarbonization speed is slow, and it is insensitive to the heating medium.
5、淬硬性
5. Hardenability
淬火后具有均匀而高的表面硬度。
After quenching, it has uniform and high surface hardness.
6、淬透性
6. Hardenability
淬火后能获得较深的淬硬层,采用缓和的淬火介质就能淬硬。
After quenching, a deeper hardening layer can be obtained, which can be hardened by using mild quenching medium.
7、淬火变形开裂倾向
7. Quenching deformation and cracking tendency
常规淬火体积变化小,形状翘曲、畸变轻微,异常变形倾向低。常规淬火开裂敏感性低,对淬火温度及工件形状不敏感。
Conventional quenching has small volume change, slight shape warpage and distortion, and low tendency of abnormal deformation. It is not sensitive to quenching temperature and workpiece shape.
8、可磨削性
8. Grindability
砂轮相对损耗小,无烧伤极限磨削用量大,对砂轮质量及冷却条件不敏感,不易发生磨伤及磨削裂纹。
It is not sensitive to the quality and cooling conditions of the grinding wheel, and is not easy to cause grinding damage and grinding cracks.
(三)beplay全站app安卓满足经济性要求
(3) The die meets the economic requirements
在给beplay全站app安卓选材是,必须考虑经济性这一原则,尽可能地降低制造成本。因此,在满足使用性能的前提下,首先选用价格较低的,能用碳钢就不用合金钢,能用国产材料就不用进口材料。另外,在选材时还应考虑市场的生产和供应情况,所选钢种应尽量少而集中,易购买。
In selecting the material for the mould, we must consider the principle of economy to reduce the manufacturing cost as much as possible. Therefore, on the premise of meeting the service performance, the first choice is the lower price. If carbon steel can be used, alloy steel will not be used, and if domestic materials can be used, imported materials will not be used. In addition, the production and supply situation of the market should also be considered when selecting materials. The selected steel grades should be as few as possible, concentrated and easy to purchase.
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山东济南beplay全站app安卓_铝合金压铸厂-山东宏捷beplay全站app安卓有限公司 手机: 13173017488 咨询热线: 0531-88771136 咨询热线:18615459955    邮箱:hlm369@126.com

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