Articles

The new heat treatment of heat deformation used for mold forging is gradually familiar with. Final forging temperature of most of mold is about 850℃. Fast cooling quenching takes place of slow cooling after forging forming. Then, it is followed by high-temperature tempering or spheroidizing annealing....

Body-in-white, also called as body shell, refers to body structural parts and covering parts, including roof cover, wheel fender, engine cover, trunk lid and car door. However, it does not contain accessories and body whose decoration parts are not yet painted.   Stamping every part is the first...

Fission crystallizer is mainly used for old precision casting. Particularly, when casting quadrate ingot, the water jacket is separated from crystallizer. With the development of casting technique, crystallizer used for modern precision casting is integrated. When use old crystallizer for casting, the...

Auto stamping parts refer to metal stamping parts consists of auto components. For auto parts, some become directly into auto components having been stamped. The others need welding, machining or oil painting after having been stamped.    Auto stamping parts have various categories. Spring...

On automobile, 60%~70% of metal components are formed through plastic processing. Stamping is one of important methods for metal plastic processing. It is also one of the most essential, conventional and important metal processing methods. Covering parts, strutting pieces, structure reinforcements and...

Hot stamping is a new advanced manufacturing technology which is specialized in forming super strength steel stamping in recent years. It is also the latest technology for manufacturing auto stampings.    The steel plate formed by hot stamping is a kind of special boron alloy steel plate....

Powder forging is an advanced metal forming technology, having high quality, high precision, high efficiency, low consumption, low cost and other advantages which can meet the requirements of low carbon, energy conservation and environmental protection in the 21st century and can also meet the requirements...

Powder forging is a powder metallurgy parts net shaping technology that has low costs and high density. In recent years, for mechanical alloying, powders with different properties can be acquired without smelting. Mixed materials can be made into products through hot isostatic pressing and warm forging....

Both casting and forging can be used for manufacturing automobile hub.  Casting In general, two methods are used to cast automobile hub: gravity casting and low pressure casting.  The process of gravity casting is quite simple. Pour liquid alloy into casting mould, then, cool the alloy into form....

1. There are stripes and metal flow marks on surface of die castings. Reasons: (a) too shallow flow channel of pouring gate; (b) too high injection pressure, causing too high flow rate of metals and splash of molten metal. Solutions: (a) deepening flow channel of pouring gate; (b) reducing injection...

Good quality of raw materials is the necessary prerequisite to ensuring production of quality forgings. Defects of raw materials will influence forming process and final quality of forgings.   If chemical element content of raw materials exceeds specified range or content of impurity elements is...

Conventional heat treatment of forgings is mostly such heat treatment of cooling forgings to room temperature and reheating them based on technological procedure. However, quenching process by remaining heat from forging is such heat treatment of using remaining heat from forging for direct quenching...

Magnesium is the lightest among commonly used metals. It is one of the most abundant elements in earth crust, accounting for 25% of earth crust. Its melting point, namely 650°C, is nearly the same as melting point of aluminum. But it is lighter than aluminum and its density is equal to one thirds...

Forging is a manufacturing process of flattening, hammering or extruding metals with great pressure to form high-strength metal parts. In general, except in special cases, metals before forging should be preheated to reach anticipated temperature. It is noted that forging and casting are different manufacturing...

Magnesium alloy castings are characterized by light weight, good rigidity, corrosion resistance, dimensional stability, shock resistance, abrasion resistance, good attenuation property and easy recycling. In addition, they also have excellent thermal conductivity and electrical conductivity, no magnetism...

Martensitic stainless steels are sensitive to cooling rate, even air cooling. During cooling process, cracks are prone to occur due to relatively great cooling stress caused by martensitic transformation. As a result of non-concurrent martensitic transformation of forging surfaces and internal forgings,...

Forging production plays a very important part in the industry. Aluminum alloys are commonly used materials in the forging process. Those forgings that can be forged by low-carbon steels can be used for aluminum alloy forging production. The introductions about the techniques and the features of aluminum...

Surface treatment technology of casting moulds indicates that surface properties are crucial to working performance and service life of moulds, in addition to the required enough strength and toughness of mould base. Surface properties include wear-resistant property, corrosion-resistant property, coefficient...

How to decrease the impurities in molten steels of continuous casting? The following are three method to realize this goal.    First. To adopt suitable casting powders.    As an important assistant material, the casting powder can preserve heat and realize lubrication during casting...

Close collaboration has always been an important aspect for buyers and producers of forgings to attain the best possible product at the lowest possible cost. As forging methods and materials are greatly improved, this cooperation is more and more crucial. A deal of high-quality products with critical...