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山东铝合金压铸防止变形与开裂的措施?

来源:六合历史开奖记录    发布时间:2019-12-03 11:36:31    点击:

现在就由济南市宏捷模具有限公司带大家了解一下山东铝合金压铸是怎么处理及防止压铸模具热处理变形与开裂的?
  Now Jinan Hongjie mould Co., Ltd. will take you to know how to deal with and prevent the heat treatment deformation and cracking of Shandong Aluminum alloy die casting mould?
  形成压铸模具热处置变形与开裂的缘由是多方面的,包括钢材的化学成分与原始组织、零件的构造外形和截面尺寸以及热处置工艺等要素都会触及。在实践消费中,变形常常是无法彻底根绝的,只能尽量减小其发作的水平,但只需采取恰当的手腕,开裂的状况完整是能够防止的。
  There are many reasons for forming the deformation and cracking of die-casting mould during heat treatment, including the chemical composition and original structure of steel, the structural shape and section size of parts, and heat treatment process. In the practice of consumption, deformation is often not completely rooted, only to minimize the level of its attack, but only to take the appropriate wrist, the complete situation of cracking can be prevented.
  准备热处置
  Prepare for heat treatment
  所谓的准备热处置是相关于更终热处置而言的,就是在更终热处置之前增加一个起到准备作用的热处置步骤,这一步骤能够为更终热处置提供一个良好的机加性能或组织形态。常见的准备热处置工艺包括退火、正火和调质等。。
  The so-called preparation heat treatment is related to the final heat treatment, which is to add a preparation step before the final heat treatment, which can provide a good mechanical performance or microstructure for the final heat treatment. Common heat treatment processes include annealing, normalizing and tempering..
  淬火加热方式和零件的防护
  Quenching heating mode and protection of parts
  淬火和回火是更易使零件产生变形和开裂的过程。关于一些小型压铸模具、细长圆柱形零件或高合金钢模具零件等,应防止运用直接加热的淬火方式,而是先将其预热至520到580摄氏度,然后再放入中温盐浴炉内加热至淬火温度。理论证明,采用这种加热方式的零件,比直接在电炉或反射炉中加热淬火,变形量明显要。炎纯鲆哺旧夏芄环乐。
  Quenching and tempering are the processes that are most likely to cause deformation and cracking of parts. For some small die-casting dies, slender cylindrical parts or high alloy steel die parts, the quenching method of direct heating should be prevented. Instead, they should be preheated to 520-580 ℃, and then put into the medium temperature salt bath furnace for heating to the quenching temperature. The theory proves that the deformation of the parts heated by this way is obviously smaller than that of the parts directly heated and quenched in the electric furnace or reverberatory furnace, and the cracking condition can be fundamentally prevented.
六合历史开奖记录_山东铝合金压铸
  另外,在停止淬火和回火处置时,有必要对零件容易发作变形和开裂的部位,采取措施停止有效地维护,使其外形与截面对称,内应力坚持平衡。特别关于那些外形复杂的零件更是如此。常用的维护办法包括捆包法、填充法和梗塞法等。
  In addition, when quenching and tempering are stopped, it is necessary to take measures to stop the effective maintenance of the parts prone to deformation and cracking, so that the shape and section are symmetrical, and the internal stress is kept in balance. Especially for those parts with complex shape. Common maintenance methods include baling method, filling method and infarct method.
  冷却方式优化和冷却剂的选择
  Optimization of cooling mode and selection of coolant
  当压铸模具零件加热终了,从炉中取出后不应直接放入冷却剂中,那样容易形成部分温差过大而招致变形和开裂。正确的办法是应先将零件置于空气之中停止预冷,然后再放入冷却剂中淬火。为保证零件各个局部冷却速度平均,放入冷却剂后还应停止恰当旋转,且旋转方向更好是不固定。
  When the die-casting die parts are heated up, they should not be directly put into the coolant after being taken out of the furnace, which is easy to cause deformation and cracking due to excessive temperature difference. The correct way is to put the parts in the air to stop precooling, and then put them into the coolant for quenching. In order to ensure the average cooling speed of each part, the proper rotation should be stopped after the coolant is put in, and the rotation direction should preferably be not fixed.
  冷却剂的选择也同样重要。关于合金钢而言,运用硝酸钾和亚硝酸钠热浴的等温淬火或分级淬火是减小变形的有效办法,特别是对处置外形复杂、尺寸请求准确的压铸模具而言。有些多孔模具零件,具有在油中冷却收缩,在硝酸盐中冷却收缩的特征,合理应用两种不同介质,也能够减小由于淬火形成的零件变形。
  The choice of coolant is equally important. As for alloy steel, the use of isothermally or step quenching with potassium nitrate and sodium nitrite hot bath is an effective way to reduce the deformation, especially for die-casting dies with complex shape and accurate size requirements. Some porous die parts have the characteristics of cooling shrinkage in oil and cooling shrinkage in nitrate. Reasonable application of two different media can also reduce the deformation of parts due to quenching.
  回火处置的控制
  Control of tempering treatment
  压铸模具零件在冷却剂中淬火之后,不应该在空气中停留过久,而是要及时放入回火炉中停止回火处置,以消弭零件的内应力,减小变形和开裂倾向。特别关于一些需求停止线切割加工的压铸模具零件,在线切割加工之前采用分级淬火和屡次回炽热处置,能够有效进步零件的淬透性,使其内应力散布平均,不易发作变形和开裂。在回火处置过程中,一定要防止低温回火脆性和高温回火脆性的呈现。
  After quenching in the coolant, die-casting die parts should not stay in the air for too long, but should be put into the tempering furnace in time to stop tempering, so as to eliminate the internal stress of parts and reduce the deformation and cracking tendency. Especially for some die-casting die parts that need to stop the WEDM, the use of graded quenching and repeated heat treatment before the WEDM can effectively improve the hardenability of the parts, so that the internal stress distribution is average, and it is not easy to deform and crack. In the process of tempering treatment, it is necessary to prevent the appearance of low temperature temper brittleness and high temperature temper brittleness.
  以上就是由济南市宏捷模具有限公司对压铸模具热处理变形与开裂的处理及防止问题的介绍,希望可以帮到你,欢迎访问官网
  The above is the introduction of Jinan Hongjie mould Co., Ltd. to the treatment and prevention of deformation and cracking in heat treatment of die casting mould. I hope to help you. Welcome to the official website
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