国产精品久久久久久黄片_国内日韩精品天天更新_免费精品无码AV在线播放_亚洲欧美国产激情91_手机在线的A站免费观看_一本大道香蕉久97在线播放、_依依成人毛片网站免费看_欧美日韩一级自拍_亚洲av成人男人的天堂网站_欧美亚洲另类色国产综合

News & Events

News & Events

Application and comprehensive cost analysis of heating insulation riser in alloy steel wear-resistant castings

Release time:

2024-02-01

No matter what kind of production process is used, the design and selection of riser process have a great influence on the quality of castings. With the increasing maturity of domestic casting material suppliers in producing heat insulation riser technology, more and more casting manufacturers begin to use heat insulation riser technology.

The heating insulation riser sleeve has the characteristics of initial insulation, intermediate heating, and finally long-term insulation. By extending the liquid time of the molten steel in the riser, the feeding efficiency and casting quality are improved.

Compared with ordinary insulation riser, heating insulation riser has the following advantages:

1) effectively solve the casting shrinkage, shrinkage cavity and other defects, improve the density of castings.

2) Significantly reduce casting slag, porosity and other defects.

3) Significantly improve the feeding efficiency of the riser and the production rate of the casting process, and improve the economic efficiency of the enterprise.

4) Reduce the cost of riser cleaning and welding workload;

5) Casting crack tendency caused by riser thermal cutting;

At present, the production process of high manganese steel castings mainly adopts the following production processes: one is that most of the casting surface quality requirements are not high, CO2 hardened water glass sand molding process is adopted; The other is the production process of alkaline phenolic self-hardening resin sand, which generally requires higher requirements. Most export castings adopt this process. Some enterprises in the market also use nitrogen-free or low-nitrogen furan resin, but the quantity is still relatively small; there are also such castings produced by V method molding; There are also such castings produced by phenol urethane resin.

No matter what kind of production process is used, the design and selection of riser process have a great influence on the quality of castings. With the increasing maturity of domestic casting material suppliers in producing heat insulation riser technology, more and more casting manufacturers begin to use heat insulation riser technology.