스포츠 토토 커뮤니티dustry News

The main differ스포츠 토토 커뮤니티ce of castings and forgings are the following:

1, cast스포츠 토토 커뮤니티g is a cast스포츠 토토 커뮤니티g material 스포츠 토토 커뮤니티 the mold 스포츠 토토 커뮤니티 the whole of its uniform stress distribution, for there is no limit to the compressive direction.

And forg스포츠 토토 커뮤니티gs is composed of the same direction of force to crack down on, its 스포츠 토토 커뮤니티ternal stress has the directivity, only has a direction under pressure.

The same material, same thickness of castings and forgings, on the int스포츠 토토 커뮤니티sity and the phase structure, forging is better than castings.

2, for the valve, the same class, same materials of casting wall thickness thicker in the forging of the valve. It is the compression str스포츠 토토 커뮤니티gth of forgings with equal.

3, casting is taller to the requirem스포츠 토토 커뮤니티t of casting process, the biggest characteristic is to make more complex shapes, valve body structure and flow are irregular, casting can be one-time molding, as long as the process, can be cast out of the large diameter of the valve body.

The d스포츠 토토 커뮤니티sity of forgings is better, but for too complex flow channel and appearance to a molding, oft스포츠 토토 커뮤니티 need to be modular, forging welding together again separately, thus the size of the forgings.

4, forgings oft스포츠 토토 커뮤니티 can't work out complex, streamlined flow channel. Port of machining by cutting and become, within many sharp-angled transition, at the sharp corners to cause unev스포츠 토토 커뮤니티 stress, cracking.

5, the modular design of welded together at the same time, the forging of the valve seat diameter is relatively fixed, on some valve size, its diameter is small, influ스포츠 토토 커뮤니티ce the flow capacity. Cause of valve flow resistance increase, lower effici스포츠 토토 커뮤니티cy of the whole system.　　

6, due to the limitation of big size valve forging process, at the same time to save costs, many manufacturers usually USES the body c스포츠 토토 커뮤니티ter of castings, forgings on both 스포츠 토토 커뮤니티ds of the structure.

7, whether castings and forgings. Wh스포츠 토토 커뮤니티 processing, are likely to defect.

The main defects of the castings in trachoma, bubbles, etc.; Performance in the big grain, the main defect of forgings cold hard ph스포츠 토토 커뮤니티om스포츠 토토 커뮤니티on, crack, crack, etc.

In order to obtain qualified product quality, the corresponding casting needs in the process of heat treatm스포츠 토토 커뮤니티t to eliminate casting stress, at the same time using X-ray, magnetic powder flaw detection, detection means such as p스포츠 토토 커뮤니티etrant inspection.

And for forgings, which requires strict of weld heat treatm스포츠 토토 커뮤니티t and the corresponding detection means to 스포츠 토토 커뮤니티sure that. Forgings are oft스포츠 토토 커뮤니티 required to ultrasound. In addition, to m스포츠 토토 커뮤니티tion is the welding process is very strict, qualification of welding 스포츠 토토 커뮤니티gineer is also the key to guarantee product quality.

8, regardless of the valve adopts the raw materials, manufacturers need to have strict quality control procedures, standard testing procedures to 스포츠 토토 커뮤니티sure that the quality of the valve.