海峡金属材料公司长期直销各国进口弹簧钢，牌号齐全，质量保证，高强度弹簧钢丝，60Si2Mn弹簧钢圆棒，弹簧钢厂家，进口弹簧钢，进口弹钢带,进口弹簧钢丝.进口弹簧钢板，进口弹簧钢圆棒，弹簧钢带，弹簧钢板，弹簧钢圆棒，弹簧钢丝.直销代理美国芬可乐弹簧钢，德国撒斯特弹簧钢，日本住友弹簧钢，英国进口弹簧钢，台湾中钢弹簧钢，中国弹簧钢牌号等海峡公司供应相应牌号如下：

中国弹簧钢：65 70 85 65Mn 70Mn 55Si2Mn 55SI2MnB 55si2mnVB 60Si2Mn 60Si2MnA60si2CrA 60Si2CrVA 60CrMnBA. 60CrMnA 50CrVA  55CrSiA  55CrMnA  60CrMnOA  30W4Cr2VA 70Si2CrA

台湾中钢弹簧钢：SK3 SK4 SK5 SK7 SKS51 S55C S65C SK85 T8A T12A  T10A

美国芬可乐弹簧钢：1065 1070 1084 1566 1572 4151 5155 5160 6150 9255  9260  51B60H

德国撒斯特弹簧钢：C67E CK67 C75E CK75 C85E CK85 C101E CK101 38Si6 38Si7 46Si7. 51Si7 55Si7 56Si7 65Si7 71Si7 60SiMn 51MnV7 54SiCr6 60SiCr7 67SiCr7 55Cr3  50CrV4 58CrV4 51CrMO4 45CrMOV6-7 52MnCrB3.

日本住友弹簧钢：SUP3 SUP6 SUP7 SUP9 SUP9A SUP10 SUP11A SUP12 SUP13 S50C-CSP S55C-CSP S60C-CSP S65C-CSP S70C-CSP SK5-CSP SUP10-CSP .

东莞市海峡金属材料有限公司

Dongguan City Straits metallic material limited company

全国统一销售热线：400-669-1516

公司传真：0769-85375005

配货查询：0769-85386006

加工中心：0769-85387007

敬请关注海峡公司高强度弹簧钢丝，60Si2Mn弹簧钢圆棒，弹簧钢厂家最近到港及报价,详细请登陆海峡现货网查询:www.sk5sk7.com.

55SiMnVB--特性：强度、韧及塑性及淬透性均比60Si2MnA钢高，油中临界淬透直径约为50~107mm；热加工性能良好，热处理时表面脱碳倾向小，回火稳定性好。用途：适用于制造中型截面尺寸的板弹簧和螺旋形弹簧，可代替60SiMnA钢使用。
                                                                     

Equilibrium precipitated phases in switch K2 spring steel in the temperature range of 400 to 1600℃ and the solubilities of Nb and V in austenite were calculated by using the thermodynamic software Thermo-Calc to investigate the effect of alloying element content on the equilibrium precipitated phases.Then,the effect of Nb content on the precipitated phases was analyzed by carbon extraction replica and transmission electron microscopy（TEM）.It is shown that the main equilibrium precipitated phases in switch K2 spring steel are MX,M7C3,M3C2 and AlN,and the stability of MX phase can be significantly improved by adding Nb.TEM results reveal that the precipitated phases are spherical or disc-shaped,and their sizes range from several nanometers to more than 100nm.With the content of Nb increasing,the proportion of fine particles which precipitated from low-temperature phase ferrite increases dramatically,and the proportion of undissolved carbonitride also increases,overall the average particles size is refined.The large precipitates are Nb-rich carbides,while the small ones are V-rich carbides,which is in accordance with the results of thermodynamic calculations.