Research progress of Austempered Ductile Iron in China
It is the first time in our country to austemper the rare earth magnesium nodular iron at lower temperature and […]
It is the first time in our country to austemper the rare earth magnesium nodular iron at lower temperature and […]
Krzy ń ska a analysis by transmission electron microscopy (TEM) shows that the ferrite in acicular ferrite in ADI is
The research of Austempered Ductile Iron in the world began in the 60s of last century At the end of
In order to obtain ADI material with stable structure and performance, the salt bath used for isothermal transformation should have
The steel contains no other alloying elements except carbon and silicon and manganese alloy elements for deoxidation. This kind of
As a key factor affecting the microstructure and properties of austempered ductile iron, the range of isothermal quenching temperature (TA)
The increase of austenitizing temperature (t γ) and the prolongation of austenitizing holding time (t γ) can increase the solid
The small fluctuation range of chemical composition, especially the content of C, Si, Mn, P, s, re and Mg, is
The quality of ductile iron blank is the key to prepare high performance ADI material. The more graphite spheres are
Austempered Ductile Iron material standard American, European, Japanese and Chinese Austempered Ductile Iron grades and performance standards. The publication and
Isothermal transformation of ductile iron The specific process of Austempering is as follows: the nodular iron castings are heated to
In the 1930s, the isothermal quenching heat treatment technology was put forward in the United States through the isothermal transformation
5.Buried box with empty shell 5.1 preparation before embedding The inner wall of the roasted hollow shell cavity is smooth,
4.Baking of coating shell The baking of coating shell is the key link of the process. In the process of
Casting Name: 105 type cable head; material: ZG310-570; geometric dimension: 620 mm × 290 mm × 210 mm; single piece
The shell casting process of lost foam casting has cleaned the foam thoroughly and thoroughly through the roasting process before
The reason is that a lot of alloy elements are added into the casting during the process of proportioning, among
Figure 1 shows the metallographic structure of the steel tested after tempering at different temperatures. It can be seen from
The excellent properties of austempered ductile iron are closely related to its unique microstructure. The typical matrix structure of austempered
The casting process test of diesel engine block was carried out by using the process determined by analysis. The production
Dredger is a common dredger, working in sand and silt. It is generally used to excavate various kinds of silt,
The exhaust system of large castings mainly considers the exhaust of mold cavity and sand core. It is difficult to
Combined with the production conditions and experience, the casting shrinkage is 1% in length direction, 0.8% in height direction and
The engine body is an 8-cylinder in-line structure. Its appearance is shown in Fig. 1 and its sectional view is
As the core part of diesel engine, the engine block carries all parts of the engine. Its working environment is
The stop valve has five over-flow areas that need attention. According to the flow direction sequence, they are end channel
The independent valve seat of the globe valve is usually connected by welding. Because the welding rod should go deep
According to the current standard API 623-2013 “steel globe valves – Flanged and butt welded ends, bolted bonnet”, bs1873-1975 “steel
Stop valve is an indispensable fluid control product in modern industry, which plays a role of cutting off and throttling
(1) Preparation of main metal charge Weigh and prepare the main metal charge. (2) Preparation of main accessories Weigh and