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HARDOX500耐磨板浇注时有哪些要求!

所属分类:常见问题 发布时间:2021-02-27 13:15:55 来源:http://www.lcnmb500.com 浏览量:

HARDOX500耐磨板浇注时,加入的悬浮剂只有在浇注系统中和型腔内全部熔化才能体现出它的作用,并且熔化的时间不能太长。即金属粉粒于钢水在浇注系统中流动以及在型腔内过热热量散失的时间之内应全部熔化完。如果颗粒过大、数量过多,当型腔内钢水开始凝固时会有一部分尚未熔化。这部分金属粉是过剩的,不只是浪费材料而且会造成金属内部的缺陷。颗粒过小、数量过少则起不到预期的作用。

During the casting of hardox500 wear-resistant plate, the effect of suspending agent can be reflected only when it is completely melted in the gating system and in the mold cavity, and the melting time should not be too long. That is to say, the metal powder is melted completely within the time when the molten steel flows in the gating system and the superheated heat is lost in the cavity. If there are too many particles, some of them will not melt when the molten steel begins to solidify. This part of metal powder is surplus, which not only wastes materials, but also causes defects in the metal. If the particle size is too small and the quantity is too small, it can not play the expected role.
HARDOX500耐磨板浇注时有哪些要求!(图1)
在浇注时,HARDOX500耐磨板钢水中加入悬浮剂,窿就会增大液体金属流动时的摩擦阻力。悬浮剂还起到内冷铁的作用,使温度降低,钢水的流动性也随之下降。用断面为梯形,截面积为悬浮浇注和非悬浮0.3cm2、 0.56cm2、0.5cm2、 l.0cm2浇注钢水流动性的比较的流动性试样测定加入金属粉和不卜非悬浮浇注悬浮浇注加金属粉的钢水的流动性,以钢水充填的长度作为流动性的衡量标志。悬浮浇注的钢水的流动性较对比的钢水低15%一20%。为保持充填程度相同则必须相应扩大浇注系统的截面积。
When casting, adding suspending agent into hardox500 wear-resistant plate molten steel, the hole will increase the friction resistance of liquid metal flow. The suspending agent also acts as an internal chill, which reduces the temperature and the fluidity of molten steel. The fluidity of molten steel with and without metal powder was measured by the fluidity sample with trapezoidal cross-section and 0.3cm2, 0.56cm2, 0.5cm2 and 1.0cm2 cross-section. The fluidity of molten steel with metal powder and without metal powder was measured by the filling length of molten steel. The fluidity of the suspension casting molten steel is 15% - 20% lower than that of the contrast molten steel. In order to keep the same filling degree, the cross-sectional area of gating system must be enlarged accordingly.
通常在HARDOX500耐磨板钢水进人铸型型腔之前,在铸型中有一个钢水旋转的空间,其目的在于使金属粉和钢水均匀混合。在此处钢液在旋转过程中和金属粉混合均匀。钢水由浇口杯经浇道以切向引入,在圆柱形的空腔中进行旋转。
Usually, before the molten steel of hardox500 wear-resistant plate enters the mold cavity, there is a space for the molten steel to rotate in the mold, which aims to make the metal powder and molten steel mix evenly. At this point, the molten steel and metal powder are mixed evenly in the process of rotation. Molten steel is introduced tangentially from the gate cup through the runner and rotates in the cylindrical cavity.
漏斗中放入一定量的悬浮剂,当其落下时和钢水混匀后进人直浇道。圆柱形空腔底部孔的位置应避免和切向引入的斜浇道的出口直接相对,以防止钢水从斜浇道流出后,立即向下流入直浇道之中,一般应错开一个角度。造型时在附加箱中作出引人浇道和圆柱形空腔。这种方法虽然混合的效果较前一种稍差些,但浇注系统简单,铸造工艺过程大为简化。经实践证明完全可以达到悬浮浇注的目的。
A certain amount of suspending agent is put into the funnel. When it falls, it is mixed with molten steel and then enters the sprue. The position of the hole at the bottom of the cylindrical cavity should be avoided to be directly opposite to the outlet of the tangential inclined runner, so as to prevent the molten steel from flowing out of the inclined runner and flowing down into the sprue immediately. Generally, it should be staggered at an angle. When molding, the guide runner and cylindrical cavity are made in the additional box. Although the mixing effect of this method is slightly worse than that of the former one, the gating system is simple and the casting process is greatly simplified. The practice shows that the purpose of suspension casting can be achieved.