Hi, kavery.mp :
No, there isn't any way to disable comments. That's by design. SAP Community is a platform for engagement, not push communications. We encourage our members to comment on blog posts, and we expect the authors to reply -- as this type of interaction is part of the power of a community.
If you'd like to learn more, we cover this extensively in the "encourage engagement" step in our blogging tutorial: https://developers.sap.com/tutorials/community-blogging.html#68865f6d-ec4a-4cec-bde8-7c7b238e7e75.
I think it's not feasible to disable comments from SAP Blog. You can also go through below SAP Blog tutorial.