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橡塑技术与装备 CHINA RUBBER/PLASTICS TECHNOLOGY AND EQUIPMENT

参考文献 ： [3] 张津超，石世宏，龚燕琪 . 等 . 激光熔覆技术研究进展 [J].
[1] 赵洵，赵清万 . 大型双螺杆挤压造粒机生产过程中的常见问题 表面技术，2020,49(10):1-11.
[J]. 石油和化工设备，2019,22(03):67-68. [4] 陈冠秀，安立周，王硕 . 等 . 激光熔覆技术的研究概况及其发
[2] 耿孝正 . 双螺杆挤出机及其应用 [J]. 中国塑料，2005(02):73. 展趋势 [J]. 机电产品开发与创新，2022,35(05):15-18.

Research on laser cladding process on the surface of screw element for
extruder pelletizer

2
1
1
Wang Likai , Meng Yan , Wang Lu , Zhang Guangwei 2
(1.Olefin No.1 Branch of National Energy Group Ningxia Coal Industry Co. LTD., Yinchuan 750409, Ningxia,
China;
2. Dalian Rubber ＆ Plastics Machinery Co. LTD., Dalian 116039, Liaoning, China）
Abstract: In this paper, the laser cladding process is used to clad two new cladding materials of Cr18
series with 5~6 mm on 38ClMoAl substrate, and the organization and morphology of the cladding metals
were analyzed and the changes of their wear resistance and hardness were determined. The size of the
deformation during the repair process of the laser cladding process was determined by comparing the size of
the inner hole splines before and after the repair of the original screw. The results show that the fusion cladding
metal is well combined with the matrix, mainly dominated by dendritic martensite, with hard carbides diffusely
distributed between the dendrites. A fine heat-affected zone was formed between the cladding layer and
the substrate, and the melt grew rapidly along the direction of maximum heat dissipation perpendicular to the
interface, forming cytosolic crystals and dendritic crystals with obvious upward growth. The average hardness
#
of 1 molten metal is 50~52HRC, and the average hardness of 2 molten metal is between 54~57HRC. Through
#
the wear comparison, it can be seen that the two kinds of cladding metal wear weight loss is 68% and 36% of
45 hardened steel respectively. Detecting and comparing the dimensions of the screw element before and
#
after repair, the dimensional deformation of the parts after laser repair is within 0.12 mm on average, which
meets the repair requirements.
Key words: extrusion pelletizer; screw element; laser cladding; organization and morphology
（R-03）

多方共同出资 1 亿 成立特种橡胶公司
Multiple parties jointly invested 100 million yuan to establish a special rubber company
凯立新材 10 月 29 日公告，公司拟与宁波国悦企业管理合伙企业、宁波乾朗企业管理合伙企业、控股股东西
北有色金属研究院控制的西安西色院五号企业管理合伙企业（以下简称 “ 西色院五号 ”）、林涛、张咪、文永忠共
同出资 1 亿元设立合资公司彬州凯泰新材料有限公司（以下简称 “ 彬州凯泰 ”，暂定名，最终以工商登记核准名
称为准）。
其中，凯立新材认缴出资 4 000 万元，认缴比例 40%，彬州凯泰设立后将纳入公司合并报表范围。彬州凯泰
成立后，将专注于氢化丁腈橡胶特种材料的研发、生产和销售。
西安凯立主要从事贵金属催化剂的研发与生产、催化应用技术的研究开发、废旧贵金属催化剂的回收及再加
工等业务。
摘编自 “ 聚胶 ”
（R-03）

·40· 第 49 卷 第 12 期