Dc53 cold work die steel - → Dc53 Hitachi domestic → Dc53 cold work die steel → 〖〗 the Dc53 mold material haituojinshu - → Dc53 Hitachi mold steel - → Dc53 - → 〖haituojinshu〗 Dc53 purposes → Dc53 imports Hitachi → Dc53, Japan hardness → 〖haituojinshu the〗 Dc53 heat treatment → Dc53 wear-resistant → Dc53 Hitachi → Dc53, Japan round bar → → → Dc53 Dc53 wool → to 〖haituojinshu〗 the Dc53 mold steel mold material in Japan 〖the Dc53 Japan prices haituojinshu〗 → Fushun → Dc53, Dc53 die steel, tool steel → 〖haituojinshu〗 domestically produced materials a Dc53 imported materials → Dc53 → Dc53 Chinese the Dc53 imports → 〖the metal mold steel haituojinshu〗 Japan Dc53 high abrasion toughness cold work die steel → Dc53 toughness → 〖haituojinshu〗 Dc53 mold steel performance → Dc53 material prices → Dc53 → 〖haituojinshu good〗 Dc53 toughness → the Dc53 heat treatment deformation mold steel → Dc53 chemical composition → 〖haituojinshu〗 DC53 die steel [DC53 hardness good] DC53 heat treatment hardness than SKD11, high temperature (520-530 ° C) after tempering up to 62-63HRC high hardness, strength and wear resistance DC53 more than SKD11. [DC53 excellent toughness] toughness is the SKD11 the 2 times more prominent DC53 toughness in cold work die steel, tool manufacturing with DC53 few cracks and cracking, greatly improving the service life. The less time】 【DC53 processing smaller residual stress in the wire cutting high-temperature tempering reduces residual stress, crack and deformation of the wire cutting suppression. Machinability and grindability than SKD11, the the DC53 cutting and grinding properties superior to SKD11, DC53 increase the tool life of the die and to reduce the processing step. DC53 is a new improved SKD11 cold work die steel, its technical specifications set out in the Japanese Industrial Standard (JIS) G4404. To overcome the weaknesses of SKD11 high-temperature tempering hardness and toughness, it will fully replace SKD11 in the general field of precision molds. [DC53 uses] the main purpose :: 1. (Precision stamping die) line difficult to machine precision punch die cutting, and a variety of uses stamping die and plastic deformation tools. 2 (forging, deep drawing and thread rolling with mold) other high-speed blanking punch, punch of stainless steel plate factory state: HB255 DC53 practical characteristics and advantages: machinability, abrasive. Machinability, abrasive than that SKD11 excellent processing tool life longer processing time compared Province. [Dc53] quench hardening heat treatment on the advantages than SKD11, it is possible to improve the vacuum heat treatment hardness defects. ) [Dc53 online cutting processing on the advantages】 by high-temperature tempering can reduce the residual stress and the elimination of retained austenite, to prevent the wire cutting cracks, deformation of the troubled. Dc53 in the surface hardening treatment on the advantages of the surface hardening treatment after the surface hardness higher than SKD11, to mold performance can be improved. The advantages dc53 repair welding job because of the warm-up and after hot temperature than SKD11 than simple repair welding operations. The DC53 die steel nitriding treatment: the workpiece after nitriding treatment surface to obtain a dense hardened layer, and significantly improve the wear resistance and corrosion resistance of the workpiece. 525 ° C gas nitriding treated surface hardness about 1250HV, 570 ° C soft nitriding treatment surface hardness of about 950HV. DC53 die steel Density: DC53 is slightly heavier than the average die steel, density 7.9g/cm 3 Dc53 mold steel chemical composition: carbon c: 1.00 Silicon Si: 0.91 Manganese Mn: 0.32 chromium Cr: 8.00 Mo Mo: 2.00 vanadium V: 0.28 p: 0.0007 DC53 Dc53 performance and the introduction of the mold steel: DC53 cold work die steel SKD11 (Crl2MoV) on the basis of improved conventional heat treatment conditions, the residual austenite almost all of decomposition generally omitted cryogenic treatment, strong hardness can still maintain a high toughness. An experimental design DC53 after quenching at 1040 ℃ and 520 ~ 530 ℃ high temperature tempering, hardness HRC up to 62 to 63 toughness twice Crl2MoV, the common cold die steel, and the cutting, grinding good machinability, small residual stress of the electrical processing deterioration layer, very little residual austenite, carbide fine and evenly distributed. More complex mold by the force of circumstances, some die working parts need to have some special mechanical properties, standard heat treatment process are often unable to achieve the desired performance requirements, the need for basic characteristics such as hardness, toughness and wear resistance by heat treatment appropriate adjustments to achieve the mold top working condition. Quenching temperature and tempering temperature is the main process parameters of heat treatment, the paper focuses on the tempering characteristics of DC53. The Dc53 die steel experimental design: experimental, DC53 heat treatment specification slightly to make some changes, appropriate adjustments to the quenching temperature, tempering temperature of 6-speed, ie 100 ° C, 200 ° C, 300 ° C, 400 ° C, 500 ° C, 600 ° C. 100 ℃ tempering selected the 101-2 type oven heating, the rest of the SX-25-12 box-type resistance furnace heating, each tempering temperature taken two specimens. Hardness testing selected metal Rockwell hardness test, at room temperature, HBRVU-187.5 the Burawoy optical hardness tester. The impact test 10mm × 10mm × 55mm unnotched specimen on in JB30B impact testing machine, impact energy of 0.3 KN.m or 0.15 KN.m. [Experimental results and analysis] ⒈ hardness value for each sample from each of three different locations of points measured hardness obtained under various tempering temperature hardness values ??The the comprehensive sample hardness values, DC53 tempering at 100 ~ 500 ℃ is not large, the hardness value changes; 400 ℃ temperature tempering hardness slightly higher standard heat treatment after tempering hardness peak is generally about 520 ℃; sharp decline after the high-temperature tempering at 600 ℃, the hardness, the average HRC hardness value only 52.4 tempering temperature is not too high. ⒉ impact toughness tempering after the oxidation of the sample surface decarburized layer is rubbed off, to measure the impact value of each sample in the different tempering temperatures, various impact values ??of the sample, DC53 tempering of 200 ° C, the average impact value reached more than 60 J/cm2. 500 ℃ tempering, impact toughness, show a certain high temperature temper brittleness. Above 600 ℃ tempering impact toughness is good, but the hardness dropped significantly, reach requirements. The experimental results show that the stability of the, the DC53 overall tempering better in certain tempering temperature range, the hardness and impact value little changed; toughness when tempering at 400 ~ 500 ℃ dropped significantly, the phenomenon of temper brittleness; at 600 ℃ tempering, the high toughness of the test piece, the impact value of 85 J/cm2, but the hardness is substantially decreased. In production. Require a higher cold work die some hardness, wear resistance requirements are not too high toughness can be a high-temperature tempering; higher hardness requirements, while higher toughness cold work die, should be used about 200 ℃ The low-temperature tempering. The other tempering temperature hardness and shock value calculation method can be used (such as interpolation, function approximation) prediction with experimental verification. The quenched sample carbide was the intermittent fine banded 200 ℃ tempered carbides evenly distributed, large blocky carbides are almost non-existent organization, it is better toughness. From the fracture morphology, fracture cleavage steps of 200 ° C tempering organization is far less than the quenched specimen fracture 5,000 times metallographic some small shallow dimples show its toughness. After tempering, the residual austenite more fully, a fine and uniform distribution of carbides, so that the increased toughness. DC53 die steel experimental conclusions ⒈ appropriate adjustments to the quenching temperature, DC53 200 ℃ tempering hardness and impact toughness are higher; tempering at 400 ~ 500 ℃ higher hardness, toughness dropped significantly; tempering at 600 ℃ The high impact toughness, hardness, decreased significantly. ⒉ complex shape precision die, trimming die, cold roll round tooling cryogenic tempering process should be adopted, so that the mold parts to obtain high hardness, high toughness, good wear resistance, high strength, can effectively extend the life of the die to prevent excessive wear, deformation, cracking and early failure of the phenomenon. ⒊ under the impact load large complex molds the low quenching high-back process can be used to get a higher impact toughness, to prevent mold from brittle fracture phenomenon. [DC53 die steel Specification】: round steel specifications :12 -50-150-300 sheet specifications: (MM): 20 * 105-130-153-166-206-254-306-350-450-610 30 * 105 -130-153-166-206-254-306-350-450-610 35 * 105-130-153-166-206-254-306-350-450-610 40 * 105-130-153-166-206 -254-306-350-450-610 45 * 105-130-153-166-206-254-306-350-450-610 50 * 105-130-153-166-206-254-306-350-450 -61 060 * 105-130-153-166-206-254-306-350-450-610 70,. * 105-130-153-166-206-254-306-350-450-610 (above specifications Shanghai sea Extension Metal Products Co., Ltd. the actual inventory Specification, non-standard specifications, and other specifications, please inquire of the Company)