1. Strength

The working conditions of pre作你cision mold parts are mos市多tly very bad, and som還老e of them are often subjected to國新 greater impact load, wh花站ich leads to brittle f劇員racture. In order to prevent樹物 sudden brittle fracture of mold part讀歌s during work, the mold must 道費have high strength and toughness. Th照討e toughness of the mold mainly北銀 depends on the carbon con到購tent, grain size and數聽 organization state of the音朋 material.

2. Fatigue fracture performance

In the working process風相 of precision mold parts, under t化雜he long-term action of cyc飛員lic stress, fatigue fractures就就 are often caused. Its 技歌forms include low-energy mult子問iple impact fatigue fracture, ten體醫sile fatigue fracture, contact fati照電gue fracture, and bending fatigue fr討站acture.

The fatigue fracture performance of 遠鄉the mold mainly depends on its stre訊照ngth, toughness, hardness, and t件機he content of inclusio有白ns in the material.

3. High temperature performance

When the working temperature of the m舊花old is higher, the hardne快師ss and strength will decrease,飛跳 leading to early wear of the mold or還森 plastic deformation and failure.事喝 Therefore, the mold mater店人ial should have high紙做 anti-tempering stab土都ility to ensure that the mold有制 has high hardness and工到 strength at the worki化樹ng temperature.

4. Resistance to cold and heat fatigue區厭

Some molds are in a state of re會畫peated heating and cooling during 愛服the working process, which鐘光 causes the surface of the c鐵村avity to be pulled and pres微會sure to change the stress, causing surf錯計ace cracks and peeling, increasing fr時弟iction, hindering plastic deformati拿數on, and reducing dimensional中山 accuracy, resulting in Mold failu志長re. Hot and cold fatigue朋說 is one of the main for討花ms of failure of hot work體坐 molds. This kind of Don車飛gguan precision mold parts should 會好have high resistance to 請劇cold and heat fatigue.

5. Corrosion resistance

When some molds such as plas國制tic molds are in oper通購ation, due to the prese什睡nce of chlorine and fluorine in the pla如空stic, strong corrosive gases such as HC黃相I and HF will be resolved after bein來學g heated, which will erode the surface 報家of the mold cavity, increase its技見 surface roughness, and exac著雜erbate wear failure.