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山东铝合金压铸的缺陷原因都有哪些呢?

来源:http://www.jnhjgs.cn     发布时间:2020-12-16 15:52:51    点击:

山东铝合金压铸的缺陷原因都有哪些呢?
What are the causes of defects in Shandong Aluminum alloy die casting?
一、流痕和斑纹
1、 Streaks and streaks
外观检查:铸件表面上有与金属液活动方向共同的条纹,有显着可见的与金属基体颜色不一样的无方向性的纹路,无发展趋势。
Appearance inspection: the surface of the casting has the same stripe with the moving direction of the molten metal, and there are obvious visible non directional lines which are different from the metal matrix color, so there is no development trend.
1.流痕发生的原因有如下几点:(1)模温过低;(2)浇道设计不良,内浇口位置不良;(3)料温过低;(4)填充速度低,填充时间短;(5)浇注体系不合理;(6)排气不良;(7)喷雾不合理。
1. the causes of the flow mark are as follows: (1) the mold temperature is too low; (2) the design of the runner is not good, and the gate location is bad; (3) the material temperature is too low; (4) the filling speed is low, and the filling time is short; (5) the pouring system is unreasonable; (6) the exhaust is bad; (7) the spray is unreasonable.
2.花纹产生的原因是型腔内涂料喷涂过多或涂料质量较差,解决和防止的方法如下:
2. The cause of the pattern is too much coating in the cavity or poor quality of the coating
(1)调整内浇道截面积或位置;(2)提高模温;(3)调整内浇道速度及压力;(4)适当的选用涂料及调整用量。
(1) Adjust the cross-section area or position of the runner; (2) increase the mold temperature; (3) adjust the speed and pressure of the runner; (4) select the appropriate coating and adjust the dosage.
                                                       山东铝合金压铸
二.网状毛翅(龟裂纹)
2、 Reticulate hairy wing (turtle crack)
外观检查:压铸件表面上有网状发丝一样凸起或凹陷的痕迹,随压铸次数增加而不断扩大和延伸。
Appearance inspection: the surface of the die casting has the trace of net hair like protrusion or depression, which expands and extends with the increase of die casting times.
1.产生原因如下:(1)压铸模腔表面有裂纹;(2)压铸模预热不均匀。
The causes are as follows: (1) there are cracks on the surface of die casting die cavity; (2) uneven preheating of die casting die.
2.山东铝合金压铸的缺陷解决和防止的方法为:
2. The methods to solve and prevent the defects of Shandong Aluminum alloy die casting are as follows
(1)压铸模要定期或压铸一定次数后,应作退火处理、消除型腔内应力;(2)如果型腔表面已出现龟裂纹,应打磨成型表面,去掉裂纹层;(3)beplay全站app安卓预热要均匀。
(1) The die casting die should be annealed regularly or after a certain number of times to eliminate the stress in the die cavity; (2) if there are turtle cracks on the surface of the die cavity, the forming surface should be polished to remove the crack layer; (3) the preheating of the die should be uniform.
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