Heat treatment of bucket teeth of excavator
Heat treatment is mainly to change the as cast structure of bucket teeth and change the as cast martensite into […]
Scientific
Scientific
Scientific
Material of bucket teeth of excavator
Selection of bucket teeth material according to the service condition of bucket teeth, while summarizing the shortcomings of high manganese
Scientific
Improvement measures of gray cast iron casting process for locking block of heavy lathe
1. Improvement of molding operation process As shown in the figure, change the original parting surface from φ 260mm center
Scientific
Control measures of sand sticking on the surface of cylinder block castings
1. Defect description The cylinder block is a horizontal horizontal pouring process (as shown in Figure 1), with complex structure
Scientific
Analysis of liquid metal filling process in gating system of semi closed sand casting
During sand casting, under the action of gravity, the liquid metal first enters the mold cavity through the sprue, enters
Scientific
Solution of hot crack casting defects
1.Improvement plan The existing tooling has been put into production, and the bottom injection process cannot be changed. Therefore, the
Scientific
Cause analysis of casting defects of gray cast iron brake drum
Through testing, the actual chemical composition of molten iron is: w (c) 3.35%, w (SI) 2.14%, w (MN) 0.77%, w
Scientific
Formation mechanism of hot crack casting defects
The connection opening of V-type engine body goes deep into the core, and the heat dissipation is slow. Compared with
Scientific
Defects of brake drum casting
1. Defect distribution characteristics A total of 188 castings were produced, and the semi-finished products could not be identified by
Scientific
Production technology of brake drum casting
The casting material brand of brake drum is HT250, which adopts Yingda electric furnace to melt molten iron, fcmx Xindong
Scientific
Quality control measures for inner cavity of cylinder water jacket
1. Current situation description and cause analysis For the cylinder block developed by ZHY casting in the early stage, there
Scientific
Hot crack casting defects of gray iron body parts
In order to facilitate statistics, the location of crack casting defects is numbered and marked according to figure 1. Table
Scientific
Design and selection of cold iron for key parts of wind power hub casting
Place cold iron at the position where it is difficult to set the riser or where the riser is not
Scientific
Analysis of liquid metal filling process in open sand casting gating system
Figures (a) and (b) reflect the flow of liquid metal in the sand casting axle housing when the liquid metal
Scientific
Design scheme of riser for wind power hub casting
(1) Design and selection of top riser (Fig. 1) After the mold filling, the molten iron on the top of
Scientific
Selection of pouring position of hub nodular iron castings
According to the diameter, wall thickness and inspection requirements of the main shaft hole of the wheel hub, the pouring
Scientific
Pouring temperature and mold filling speed of hub nodular iron castings
There are two process schemes of low-temperature fast casting and high-temperature slow casting for nodular iron castings of wind power
Scientific
Characteristics and difficulties of hub nodular iron castings
The nodular iron castings of wind power wheel hub belong to thick and large section castings, especially the thickness of
Scientific
Analysis of liquid metal filling process in closed sand casting gating system
Figure (a) is a real-time screenshot when the molten metal just fills the sprue at the beginning of pouring and
Scientific
Design of gating system in investment casting
Through the testing of the original investment casting prototype, it is found that there are shallow cracks at the intersection
Scientific
Material, structure and quality requirements of investment castings
The blank size of coupler parts is large, and the outline is 594mm × 370mm × 350mm, which is a
Scientific
Cleaning and deformation of valve castings
It can be seen from Fig. 1 and Fig. 2 that the inner cavity of the casting of the electro-hydraulic
Scientific
Casting defects of electro-hydraulic valve casting
The casting structure of the electro-hydraulic valve casting is complex (as shown in Figure 1), with two slender and curved
Scientific
Verification of investment casting gating system for large complex heavy duty coupler
The coupler casting scheme adopting the gating system of scheme B is trial cast. The appearance of the trial cast
Scientific
Simulation analysis and comparison of defects in investment castings
After solidification of investment casting in scheme a, there is shrinkage tendency, as shown in Fig. 1 (a), which is
Scientific
Analysis and comparison of solidification process of investment castings
In the solidification process of investment casting, the appearance, thin shoulder and thin-wall area of investment casting in scheme a
Scientific
Analysis and comparison of mold filling process of investment castings
During the mold filling process of investment castings in gating system scheme a, the metal liquid flows from the sprue
Scientific
Investment casting gating system for large complex heavy duty coupler
Coupler is the connecting device of rail vehicles. It needs to ensure that the connected carriages at both ends do
Scientific
Initial and boundary conditions of gating system in investment casting
The chemical composition of molten metal is detected in front of the furnace, and the results are shown in Table
Scientific
Determination of process parameters for sand casting of axle housing
Sand casting process parameters mainly include dimensional tolerance, linear shrinkage, draft angle and other aspects. The determination of these process