lojmikak
Dołączył: 30 Sie 2010
Posty: 1597
Przeczytał: 0 tematów
Ostrzeżeń: 0/5
Skąd: olvovw
|
 Wysłany: Śro 22:15, 05 Sty 2011 Temat postu: ugg italia Bowl cutter mold of the orthogonal blan |
 |
|
Blanking die cutter bowl boriding Quadrature
Half of Volume 14 published 69 Materia1 & HeatTreatn1ent material formed when the heat treatment technology rapidly cooled ultra low carbon martensite. The second layer transition layer, the district heating temperature is Acl-Ac,[link widoczny dla zalogowanych],, the temperature gradient is small,[link widoczny dla zalogowanych], short duration of action, the ferrite and cementite to austenite are not fully dissolved, cooling to form martensite, iron ferrite + cementite hybrid organization. The third layer is the original organization tempering area, the area change in the original tissue temperature tempering, the formation of tempered sorbite organization. The hardness after quenching and laser hardened layer distribution and process parameters for [2], shown in Figure 2. In the scanning speed is constant, the laser power increases, the depth of hardened layer increases; in certain power base Ⅱ l} {P/l0W Figure 2 hardened layer depth and power, the relationship between speed of Fig. 2Therelationbetweendepthofhardenedlayerandpower, speed, the scanning speed increases with the depth of hardened layer instead of decrease. That in the unit area and per unit time material to increase the laser energy actually absorbed, case depth on the increase. A smaller scan rate to get a deeper depth of hardened layer. But will lead to reduced productivity. Figure 3 shows, laser quenching, the surface hardness of gears 61HRC, and almost no change in the distribution of hardened layer hardness gradient, is conducive to enhancing the wear resistance of gear to extend the life of gear. It is obvious from Table 3, compared with the conventional heat treatment, the laser hardening can improve the surface hardness of gears to reduce surface oxidation and succinic parts deformation. Distance from the surface / mm Figure 3 case depth and hardness of the relationship between Fig. 3Therelationbetweendepthofhardened1ayerandhardness Table 3 Comparison results of various types of gear hardening Tab. 3Thecomparisonofdifferenthardeningprocessesforgears flame hardening induction hardening distortion nitride laser quenching carburized medium large size difference between a small difference from the cold-hardened non-rigid good depth of difference 2.0 ~ 3.0mm3.0 ~ 8.0mm0.3 ~ 1.0mm0. 1.8mm0.25mtr surface oxidation 3 major conclusions of no greater or higher gear after laser quenching. The surface of acicular martensite. Almost no change in the distribution of hardened layer hardness gradient, effectively improved the life of gear. Laser quenching to solve the conventional gear carburizing deformation problems exist, not only eliminates the need for subsequent grinding process, but also improve yield. Gears of laser hardening for a variety of materials,[link widoczny dla zalogowanych], geometry and size of different types of gear, such as thin-walled gears, large gears and special gears and other materials, has good prospects References: [1】 Wu Jian. The nitrogen laser quenching + composite choice of treatment options [J】 _ thermal processing, 2007,36 (14): 50.52. [2】 Liu Yuanyuan,[link widoczny dla zalogowanych], Huang None. Big modulus gear steel and heat treatment [J】. Machinery, 2004, (s1): 147.148. Tin (Continued from page 69 1 [5】 Yangkai Jun, Zhu Shijie, Yan full Boronizing just .4 Crl3 stainless steel process and infiltration of the structure and performance [J】. Thermal processing technology, 2004, (7): 25.26. [6 】 Ye, Li Hui. Cr12MoV boriding a complex process of quenching [J]. Sichuan Ordnance Technology. 2001.22 (4) :25-26. [7】 Jun-Hua Xu. earth a solid boron permeation mechanism and organization structural characteristics [J]. East China Shipbuilding Institute, 1996,10 (4) :77-84. [8】 Cao Xiaoming, Wen-ming, Han Wenxiang, et al. REE solid Modification of boride layer [J] . Journal of Rare Earths, 1997,15 (4) :350-353. [9】 Shi-Qing Wang. Rare Earth Elements in Chemical Heat Treatment. ... Heat Treatment of Metals, 1988, (3) :52-59. [10】 Gieseking l . Boron permeation technology and its applications [M】. Beijing: Metallurgical Industry Press .2004.74-75. [II of Wu Lu Zhou, Yang Di. boride layer of observation and analysis [J]. Metal Heat Treatment,[link widoczny dla zalogowanych], 1987, ( 2): 913. [12】 Shen Si Wen, Songyue Peng, Feng Chengming. nitrided layer of rare earth elements on the hardness, wear resistance [J]. New materials, new technology, 2002, (5) :13-15 . Tin \
相关的主题文章：
[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
[link widoczny dla zalogowanych]
Post został pochwalony 0 razy
|
|
