30cr13 martensitic stainless steel has good mechanical properties, hardenability and corrosion resistance, which is widely used in medical devices, measuring […]
The macro morphology of the preform is shown in figure (a). After sintering, ztap is fully wrapped by HCCI to
The nominal composition of the experimental alloy is shown in Table 1. The raw materials are: al-24.45% Si master alloy,
1.Selection and properties of preform materials The mass fraction of ZrO2 in ztap is 40wt%, the particle size is 1
(1) The results show that the Fe rich phase in al-17si-1fe alloy contains only long needle like β phase when
The slag holes are mainly distributed around 2 and 5 turns, accounting for 22.7%; the defect area is large and
Hypereutectic Al Si alloys have been widely used in the manufacture of automotive engine piston, cylinder block and other parts
The generation of cold shut is directly affected by the temperature of molten iron. At a certain temperature, the design
High chromium white cast iron or high manganese steel is usually used to cast wear-resistant parts such as grinding roller,
The air-conditioner of the defective product is mainly located at the highest point of the mold, i.e. 2 and 5
Large castings are not rare in iron mold sand coating process casting, but for large engine crankshaft castings with large
Air conditioner The cold air gap is the gap that penetrates or does not penetrate the casting, and the edge
1.Characteristics of wear resistant steel ball The composite wear-resistant casting steel ball has excellent comprehensive properties such as high strength,
The microhardness of lzqt600-3 ductile iron profile was tested under the optimal scheme of nitrocarburizing state in three parts. The
The steel ball used in ball mill can be divided into casting ball and forging ball. Generally, the diameter of
Lzqt600-3 ductile iron profile with horizontal continuous casting was selected as the research object. The as cast microstructure and properties
As cast and qsa313 The curve of the two samples first rises and then decreases, and fluctuates greatly. This is
The morphology and properties of Nitrocarburized layer of lzqt600-3 ductile iron profile at different positions were studied. The microstructure of
The significance of the comprehensive score data of friction and wear at the edge, 1 / 2R and center was
The range and variance analysis of orthogonal experiment were used to analyze the experimental results. Through the comprehensive balance method,
The friction and wear properties of lzqt600-3 ductile iron profile at different positions were tested. Among them, the comprehensive score
(1) Surface hardness test In order to make the depth of indentation less than the thickness of the layer and
The effective hardening depth of three parts of lzqt600-3 ductile iron profile was measured. According to the measured data, the
The sample is taken from the edge, 1 / 2R and center of lzqt600-3 ductile iron profile. It is first
The microhardness of different sections of the nitrocarburized lzqt600-3 ductile iron profile was tested. The effective hardened layer depth of
From the development and research trend of chemical heat treatment in atmosphere in recent years, it is still a hot
The evaluation index of the data is the visual analysis chart of the influence of various factors on the surface
When the piston pump works under high hydraulic pressure, abrasive wear and adhesive wear are the main failure causes of
Based on the ternary phase diagram of Fe-C-N system, the surface chemical heat treatment of nitrocarburizing is carried out. The
Nowadays, friction, lubrication and wear are the three most important research topics in tribology. Friction will cause wear, resulting in
