partitioning – Existing table partition table where partiotionkey is not part of the primary key

Main objective: Add partitioning to the table to make the removal of old non-blocking / faster orders (and understand partitioning)

I have an existing table order, like this:

CREATE TABLE Command (
OrderId INT,
Date of order Date / time,
Quantity INT,
CONSTRAINT [PK_OrderId] CLUSTERED PRIMARY KEY
(
    [OrderId] ASC
)
SURE [PRIMARY];

This table contains 50 million lines of the last 10 years.
I only need data from the last 5 years.

I have a partition function like this:

CREATE PARTITION FUNCTION OrderPF (date / time)
A RANGE OF RIGHTS TO VALUES (& # 39; 2014-01-01 & # 39;)

I have a partition scheme like this:

CREATE A PARTITION SYSTEM
AS A PARTITIONING OrderPF ALL TO ([PRIMARY]) 

My question is how?
I still want a primary key on the table.

Is the [OrderDate] column should be part of the clustered index? (Main question)

CREATE UNIQUE CLUSTERED INDEX IX_Order ON Order (OrderDate, OrderId) ON OrderPS (OrderDate);

If so, should I then create an additional non-clustered primary key only on [OrderId]?

ALTER TABLE Order ADD CONTRAINT PK_OrderId PRIMARY KEY NON CLUSTERED (Id) ON [PRIMARY];

Is this the right approach?