To Prevent the Air Bubbles in Precision C
    1. In the precision casting conditions allow conditions, complex in structure of casting the top set exhaust bubble.2. When designing gating system, abundant thought to shell exhaust demand.3. The shell roasting temperature, time to reasonab...

The Cause of The Bubbles for Investment C
    Common precision casting defects have bubbles, the bubbles is refers to the individual location precision casting present lubrication hole defect.Bubbles are usually talents were found after machining.Dongguan precision casting technology pe...

Heat Resistant Steel Working Conditions
    Above 450 ℃, and as high as 1100 ℃ above work, and under static load, fatigue, or shock. Steel contact with high temperature gas phase, surface to high temperature oxidation or corrosion damage. Material under the effect of high temperat...

Forging Forming Method
    Forging press forming method can be divided into: (1) model of closed forging.Metal blank in a certain shape in the bore of the forging die forging compression deformation, can be divided into the die forging, cold heading, rotary forging, e...

Contractility of Wear-Resistant Steel Cas
    The contraction of wear resistant steel castings by various obstacles.Some resistance from mold, core, some is due to the obstacles caused by the casting structure itself.Casting shrinkage with casting size, wall thickness and structure of t...

The Difference Between The Forging and Ca
    1, Forging is a forging machinery to pressure on the metal blank , make its produce plastic deformation to obtain a certain shape and size, a certain mechanical properties of forgings of processing methods.One of two major parts of forging....

A Common Defect of Precision Casting
    The reason:1. Most of the cases present bubble is mainly due to the fine casting exterior shell roasting is not abundant, when pouring molten steel shell suddenly produce a large number of gas cannot successful eduction, which constitute a b...

The Advantages of Common Precision Castin
    Precision casting with a small investment scale, large production capacity, low production cost, the advantages of complex product process simplification, investment, fast effect. Thus in competition with the rest of the process and the mean...

The Characteristics of The Common Precisi
    Features:1, precision casting, casting dimension precision, surface roughness, the dimension precision of casting can reach level 4, 6, the surface roughness of 0.4-3.2 mu m, can greatly reduce the casting machining allowance, and can realiz...

Performance Requirement of Strong Heat-Re
    1. Have higher high temperature lasting and creep limit andAnd good high temperature fatigue performance.2. Improve the hot strong sexual way(1) increase the Cr, Mo elements such as solid solution strengthening;(2) reduce the S and P content...

Types of Casting
    (1) special casting, press molding materials and can be divided into natural mineral sand as the main special casting molding materials (e.g., investment casting, mold casting, shell mold casting foundry, negative pressure casting, mold cas...

Casting Technique
    Casting process usually includes: (1) casting processing and inspection, foreign body casting processing including removal of core and the casting surface, remove poured riser, shovel grinding burrs and cover with seam protruding content and...