Fabrication technology upgrade of TiC-based high manganese steel bonded cemented carbide
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摘要: 将脱脂烧结一体化烧结炉应用于TiC基高锰钢结硬质合金的工业生产中，通过技术革新实现了成形剂干净脱除、高温Mn挥发有效控制与收集和合金烧结性能的改善。结果表明，相对于利用传统设备和技术制备的合金，烧结制品的密度提高1.7%～1.8%，TiC颗粒烧结粗化长大和杂质脏化有效减少。在硬度基本不变的情况下，利用升级技术制备的TM60合金和TM52合金的抗弯强度提高30%以上，冲击韧性可实现成倍提升。该项技术有利于扩大TiC基高锰钢结硬质合金的应用范围，充分发挥出钢结硬质合金优异的抗冲击磨粒磨损性能。Abstract: Modern advanced degreasing and sintering furnace was applied to the industrial production of TiC-based high manganese steel bonded cemented carbide. The full binder removal, the effective control plus collection of Mn volatilized at high temperature, and the improvement of sintering ability during sintering process were realized by the technical innovation. The results show that, compared with the traditional equipment and technology, the density of the TM60 and TM52 alloys prepared by the upgrade technology is increased by 1.7%~1.8%, and both the TiC particle growing plus coarsening and the impurities caused by degreasing in the matrix are effectively reduced. In the case that the hardness is basically unchanged, the bending strength of the TM60 and TM52 alloys prepared by the upgrade technology is raised by more than 30%, and the impact toughness can be multiplied. The upgrade technology is beneficial to expand the application of TiC-based high manganese steel bonded cemented carbides and gives full play to the excellent impact abrasive wear resistance of the steel bonded cemented carbide.
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Key words:
- steel bonded cemented carbide /
- TiC /
- high manganese steel /
- mechanical properties
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图 1 TM60制品显微组织：（a）和（b）新技术和设备制备；（c）和（d）传统技术和设备制备
Figure 1. Microstructures of the TM60 products: (a) and (b) prepared by the new technology and equipment; (c) and (d) prepared by the traditional technology and equipment
Table 1. Composition and physical properties of the TiC-based high manganese steel bonded alloys[1,15]
合金牌号 质量分数 / % 密度 / (g·cm‒3) 硬度，HRC 抗弯强度 / MPa 冲击韧性 / (J·cm‒2) TiC 高锰钢 TM52 48 52 6.10 58～62 1800 8.0～10.0 TM60 40 60 6.30 56～60 1900 6.0～8.0 
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表 3 TM60和TM52制品硬度
Table 3. Hardness of the TM60 and TM52 products
试样编号 制备设备与技术 硬度，HRC TM60 A 新 59.0 B 59.3 C 旧 60.4 D 59.9 TM52 E 新 61.7 G 旧 62.6
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