Process performance of die steel
Release time:
2024-10-12
In the mold production cost, the material cost generally accounts for 10% to 20%, while the machining, heat treatment, assembly and management costs account for more than 80%, so the process performance of the mold material is one of the main factors affecting the production cost and manufacturing difficulty of the mold.
Machinability
-hot processing performance, refers to the thermoplastic, processing temperature range, etc.;-cold processing performance, refers to cutting, grinding, polishing, cold drawing and other processing performance.
Most of the cold work die steel belongs to hypereutectoid steel and ledegret steel, and the hot working and cold working properties are not very good, so the process parameters of hot working and cold working must be strictly controlled to avoid defects and waste. On the other hand, by improving the purity of the steel, reducing the content of harmful impurities, and improving the microstructure of the steel, the hot working and cold working properties of the steel are improved, thereby reducing the production cost of the mold.
In order to improve the cold working performance of die steel, since the 1930 s, research has been made on adding S, Pb, Ca, Te and other easy-cutting elements to die steel or elements that lead to graphitization of carbon in die steel, and various easy-cutting die steels have been developed to further improve its cutting performance and grinding performance, reduce tool abrasive consumption and reduce costs.
Hardenability and hardenability
The hardenability mainly depends on the chemical composition of the steel and the original tissue state before quenching; the hardenability mainly depends on the carbon content in the steel. For most cold work die steels, hardenability is often one of the main considerations. For hot work mold steel and plastic mold steel, the general mold size is larger, especially in the manufacture of large molds, its hardenability is more important. In addition, for the shape of complex easy to produce heat treatment deformation of various molds, in order to reduce quenching deformation, often as far as possible to use the cooling capacity of the weak quenching medium, such as air cooling, oil cooling or salt bath cooling, in order to obtain the required hardness and hardening layer depth, it is necessary to use the quenchability better mold steel. [2]
Quenching temperature and heat treatment deformation
In order to facilitate production, the quenching temperature range of die steel is required to be relaxed as much as possible, especially when the die is partially quenched by flame heating, because it is difficult to accurately measure and control the temperature, the die steel is required to have a wider quenching temperature range.
Mold in the heat treatment, especially in the quenching process, to produce volume change, shape warping, distortion, etc., in order to ensure the quality of the mold, requires the mold steel heat treatment deformation is small, especially for the complex shape of the precision mold, difficult to trim after quenching, the degree of heat treatment deformation requirements are more stringent, should choose micro deformation die steel manufacturing.
Oxidation, decarburization sensitivity
Mold in the heating process, if oxidation, decarburization phenomenon, it will make its hardness, wear resistance, performance and service life is reduced; therefore, the requirements of die steel oxidation, decarburization sensitivity is good. For mold steel with high molybdenum content, special heat treatment, such as vacuum heat treatment, controlled atmosphere heat treatment, salt bath heat treatment, etc., is required due to strong sensitivity to oxidation and decarburization.
Other factors
When choosing die steel, in addition to the use performance and process performance, the versatility of die steel and the price of steel must also be considered. Die steel general consumption is not large, in order to facilitate the preparation of materials, should be considered as much as possible the versatility of steel, as far as possible the use of mass production of universal die steel, in order to facilitate procurement, material preparation and material management. In addition, a comprehensive economic analysis must be carried out, considering the manufacturing cost of the mold, the production volume of the workpiece and the cost of the mold allocated to each workpiece. From the technical and economic aspects of a comprehensive analysis, in order to ultimately select a reasonable mold materials.
Previous Page
Previous Page
More Information
2024-10-12
Plastic molds include thermoplastic molds and thermosetting plastic molds. Plastic mold steel requires a certain strength, hardness, wear resistance, thermal stability and corrosion resistance and other properties. In addition, it is also required to have good manufacturability, such as small heat treatment deformation, good processing performance, good corrosion resistance, good grinding and polishing performance, good repair welding performance, high roughness, good thermal conductivity, and stable size and shape of working conditions Wait. Under normal circumstances, injection molding or extrusion mold can choose hot die steel; thermosetting forming and requiring high wear resistance, high strength mold can choose cold die steel.
Process performance of die steel
2024-10-12
In the mold production cost, the material cost generally accounts for 10% to 20%, while the machining, heat treatment, assembly and management costs account for more than 80%, so the process performance of the mold material is one of the main factors affecting the production cost and manufacturing difficulty of the mold.
What to pay attention to when purchasing die steel
2024-10-12
The things we need to pay attention to when purchasing different products are almost completely different. We still need to pay attention to some things at this time. In fact, this aspect still plays a very important role for us. The same is true for the purchase of die steel. What should we pay attention to when purchasing die steel? We must have a proper understanding of the market before purchasing die steel. When you have a better understanding of the overall market, you will know where you are going to purchase. It is good for us to realize the actual situation that we should pay attention to in a targeted way. This aspect is a very basic thing for us as a whole, and it is better to really find a suitable place for our procurement.
What does environmental protection bring to the steel market?
2017-10-26
This year is the closing year of the "Ten Atmosphere". Since the beginning of the year, the Ministry of Environmental Protection has maintained an unprecedented high pressure on air pollution control in various places; however, in the first 7 months of this year, the concentration of PM2.5 in the Beijing-Tianjin-Hebei region increased year-on-year. 11.3%;PM10 concentration increased by 10% year-on-year, and there was huge pressure to meet the standards. With the acceptance date approaching, environmental protection measures continue to refine: 1, the central environmental supervision, high-level, local governments attach great importance. 2. Special supervision by the Ministry of Environmental Protection and the "2+26" special supervision of the atmosphere organized by the Ministry of Environmental Protection will last for one year from March 2017 to March 18. Inspectors from across the country
2017-10-26
On September 27, the research report of the iron and steel industry of Zhongtai Securities said that the single-quarter profit of most listed steel enterprises in the third quarter caught up with that in the first half of the year, of which the average gross profit per ton of steel from July to now is about 800 yuan, far exceeding that of 471 yuan in the first half of the year. The average gross profit of hot coil from July to now is about 740 yuan, about 400 yuan higher than that of the first half of the first half of the first half of the year. The most conservatively expected heating season production limits will be compressed by 8% to 9% of steel production, when the steel supply phase of the shortage can easily cause short-term steel prices large fluctuations.
Period snail volume rose, in stock transactions turned good, pre-holiday market can be expected?
2017-10-26
September 27, the national steel market prices rose slightly. The price of rebar in 10 cities, including Shanghai, Guangzhou, Beijing and Nanchang, rose by 10-30 yuan/ton, while that in Kunming and Xi'an fell by 10-30 yuan/ton. 4.75 hot-rolled coil market price volatility is strong. Prices in 15 markets, including Shanghai, Hangzhou, Guangzhou, Wuhan, Beijing and Tianjin, Shenyang and Chongqing, rose by 20-80 yuan/ton. 20mm plate market price narrow consolidation. Prices in 11 markets, including Shanghai, Hangzhou, Hefei, Wuhan, Tianjin-Hebei and Chongqing, fell by 10-60 yuan; under the market prices in Guangzhou, Beijing, Xi'an and Wu'an
Quick Navigation
Add.: Huangcaolang Second Industrial Zone, Dalang Town, Dongguan City, Guangdong Province, China
Tel.: +86-769-8313 7751
Fax: +86-769 - 8313 6003
E-mail: dgzr@zhongrui-7.cn
Follow Us
Copyright©2024 Dongguan Zhongrui Metal Material Co., Ltd.
