Special metal composition adds the metallurgy technology treatment of material

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Metallurgy treatment is being used when adding material to make a technology process work, want the parameter such as volume of the type of heat source of characteristic make choice of according to material, power and scanning speed above all, process data the area through conveyor park next, shape stage by stage below the action of heat source. Adding material to make a process is a blame machines a process continuously, the stability of process, consistency is the key of its success or failure. The requirement of the stability that the product machines, consistency needs to wait for the joint action ability of the element to assure by material, heat source, technological process. In adding material to make a process, volume of the type of common heat source, power and scanning speed are constant, the heat source that the material in machining a process namely shapes is stable and consistent. In machining a process, heat source can be reached with powder at the same time already shaped the matrix of the area produces effect, when using the means that spread pink to send pink, heat source is right pulverous action more direct; and when using direct means sending pink, the action between heat source and matrix can become more apparent. No matter powder uses which kinds of means to be shaped by park area, in same action area, space, heat source is stable to gross of powdery style intention. Heat source action at material, accept action mechanism and material oneself position (be like granuality, globose degree, exterior condition) the influence that waits for an element. Accordingly, the stability that gains material to make a process is final decide by the stability of material, consistency place. The consistency of material is better, the metallurgy change that the material in machining a process produces is stabler, the change that just can assure the material in scanning method so and final performance more stable, consistent. To pulverous material, the groovy performance such as the chemical part that the consistency of function includes material not only, organization, mechanical function is consistent, at the same time feature of its form appearance, if bead is diameter size, spherical,spend waiting for an element also is main index. Optimal adds material to make answering with powder is bead diameter dimension, appearance is consistent. Accept the restriction that produces craft and method, in actual production use completely consistent data very hard, the powder that treatment uses mixes by the powder of a variety of bead diameter commonly and become. To assure to machine the stability in the process, the metallurgy change that this kind of mixture powder produces in machining a process should be controlled inside reasonable range. The powder in adding material to make a process suppose all is ideal sphere, density of heat source energy distributings equably, the influence of oversight material appearance to heat source absorptivity and the photograph of the material in machining a process change wait for an element. Pulverous in shape be heated to come in the process shape the energy that temperature place requires is: By the characteristic that adds material to make a technology knowable, k is constant. Offer when Q / optimal treatment status is when Q needs =1, material falls in the action of heat source namely won't overheat, also won't owe hot; and offer when Q / Q needs > 1 when, the specification machines the oversupply demand of the heat source in the process, redundant energy can heat powder to shape to prep above needs temperature; is offerred when Q / when Q needs <1, show the in short supply of energy. As a result of: Pulverous diameter is smaller, in other parameter same condition falls, q is offerred > after metallic melt, the effect that suffers exterior tension produces a ball extremely easily to change, as a result of the cooling rate in shaping fast, the ball is changed may be come down by complete reservation, make the exterior quality of workpiece drops, serious when can cause treatment to cannot undertake. Discover in actual production, the scale of fine pink in the ball happening to change phenomenal degree to follow powder in machining a process increases and increase. When pulverous diameter is too big, heat the energy that the process gets cannot heat powder adequately to shape to ideal temperature, the metallurgy change that this may cause material is not complete, affect the adhesion between material, make the compact sex of workpiece drops. When pulverous diameter reachs one critical value, shape process general cannot undertake completely. By the metabolic rule of function knowable, in it is the photograph adjacent area among with D0 inside, the change of function is relatively gently, the better than deviate position of the supply of energy and demand is relatively right now minor, this benefit adds material to make the stability of the process at maintaining. Can push from this know, add material to make used pulverous material particle size distribution should be inside a narrower range. This and add material to make the size that uses noodles or vermicelli made from bean or sweet potato starch be in commonly at present actual condition conform to suits 500 purposes of 200 ～ . CNC Milling